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Sustain09 School of Natural and Built Environments Postgraduate Poster Presentation April 9, 2009 University of South Australia, Mawson Lakes

Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

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Page 1: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

 

 

Sustain09  

 

School of Natural and Built Environments 

Postgraduate Poster Presentation 

April 9, 2009 

University of South Australia, Mawson Lakes

 

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i  

 

Communication is a vital part of any research. We communicate to form research 

collaborations,  to gain  funding,  to have our  findings  reviewed, and  to  share our 

results with our peers and the wider community. Research conferences often offer 

the  opportunity  to  communicate  via  poster  presentations.  A  well  structured, 

informative  and  attractive  poster  can  be  very  effective  at  capturing  the 

imagination  of  other  researchers.    In  addition,  developing  a  poster  involves 

selecting  your best  research, and using efficient words and  ideas  to  reduce  this 

research  to only a  few hundred words. The process  therefore helps  the  student 

focus on what is really important in any study. Hence, preparing and presenting a 

poster is a vital skill for all postgraduate students, and indeed for all researchers.  

 

As part of its postgraduate program the School of Natural and Built Environments 

holds an annual poster presentation  for research students to develop the poster 

construction  and  presentation  skills  that will  help  them  develop  as  researchers 

and  in  their  future  careers.  The  School  has  a  diverse  array  of  students  from 

Australia and around the world and the research conducted falls within a number 

of academic disciplines.  

 

The gathering  together of  these  students  to present and discuss  their work has 

many  benefits.  First,  they must  succinctly  portray  a  quantum  of  their work.  In 

itself,  this  process  is  an  important  skill  and  one  that  can  only  be  honed  with 

practice  and  feedback.  Second,  the  discussion  of  their  project  with  other 

researchers  often  leads  to  new  insights,  new  directions,  or  new  collaborations. 

This  speculation  is of  great benefit  to  all  involved.  Third,  the  research  students 

must consider  the work of  their peers. This consideration can  lead  to new  ideas 

for  their  own  projects  –  new  ways  to  view  or  collect  data,  new  methods  of 

analysis,  or  new  ways  to  present  results.  Fourth,  research  gatherings  lead  to 

Welcome from the Director of Research 

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meetings and  friendships  that can provide  support  through a  research  student’s 

degree and beyond. These events are a welcome addition to the opportunities for 

School  staff  and  students  to  share  their  research.  The  diversity  of  the  School 

ensures  that  these  events  are  a  fascinating  and  stimulating  gathering  of 

personalities and research.  

 

I am continually impressed by the quality of work conducted and presented by the 

research  students  within  the  School  of  Natural  and  Built  Environments.  The 

posters presented  in  this document are a great example of both  the breadth of 

research conducted at the School and its quality. I thank the research students for 

again  rising  beyond what  is  expected  of  them  and  ensuring  the  success of  this 

forum.  This  success  is one  that benefits both  the  students  and  the  School  as  a 

vibrant research culture that continues to grow.  

 

Professor Chris Daniels 

Director of Research 

School of Natural and Built Environments 

April 2009 

 

               

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Table of Contents 

 

Organising Committee  ................................................................................................ v 

About the school  ........................................................................................................ vi 

Presentation Program  .............................................................................................. viii 

Posters  ....................................................................................................................... 1 

‐ Dating 14C‐ bearing groundwater using 36Cl  

‐ Housing pathways and community integration of African refugees in Australia: Towards 

an understanding of African refugee housing issues 

‐ Role and Perception on Urban Green Space in Kuala Lumpur and Adelaide  

‐ Development of Coagulation for Optimised Removal of Environmental  

Pollutants  

‐ Clues from the Past with a View to the Future 

‐ People, Land, Opportunity  

‐ Barriers to Local Governments' Action to Address Climate Change  

‐ Direct Seed Mix Treatments for Restoration of Vacant Agricultural Land  

‐ Modelling Australian Road Transport Greenhouse Emissions in Carbon Constrained 

Economy 

 

 

Usama Abu Risha ..................................................................................................................................................... 2

Paul Atem ................................................................................................................................................................ 3

 

Zainul Mukrim Baharuddin  ..................................................................................................................................... 4

Behnoosh Bazr Afkan  .............................................................................................................................................. 5

Mary‐Anne Binnie .................................................................................................................................................... 6

 

Paul Corcoran .......................................................................................................................................................... 7

Cathryn Hamilton  ................................................................................................................................................... 8

Michael Heath  ........................................................................................................................................................ 9

Ivan Iordanov Iankov  ............................................................................................................................................ 10

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‐ TOD ‐ Transit Oriented Development  

‐ The Development of Level Crossing Risk Index  

‐ Integrating Natural and Built Environments  

‐ Australian Contaminated Sited Law and Policy Case Studies  

‐ Fate and Dynamics of Endocrine Disrupting Chemicals (EDCRS) and Pharmaceutically 

Active Compounds (PhACs) in the Soil Environment  

‐ Sustainable Transport   

‐ What is Citizen Science?  

 ‐ Linking Macro and Micro Traffic Models  

‐ Travel Time Reliability for Selected Adelaide's Corridors  

‐ Shelter Properties of Cracking Clays: Implications for Rangeland Biodiversity  

‐ Fuzzy‐Neuro for Trip Distribution Estimation  

 

  

      

Susan Irvine  .......................................................................................................................................................... 11

Siti Zaharah Ishak  .................................................................................................................................................. 12

Timothy Johnson  .................................................................................................................................................. 13

Sally Legg  .............................................................................................................................................................. 14

Gareth Lewis  ......................................................................................................................................................... 15

Jaruwit Prabnasak  ................................................................................................................................................. 16

Philip Roetman  ..................................................................................................................................................... 17

Branko Stazic  ........................................................................................................................................................ 18

Susilawati  .............................................................................................................................................................. 19

Helen Waudby  ...................................................................................................................................................... 20

Gusri Yaldi  ............................................................................................................................................................. 21

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Organising Committee 

 

Ms Susan Irvine, PhD candidate 

Mr Michael Heath, PhD candidate 

Mr Philip Roetman, Masters candidate 

Ms Leonie Edwards, School Administrative Officer (NBE) 

Professor Chris Daniels, Director of Research (NBE) 

                              

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About the School  

 

The  School  of  Natural  and  Built  Environments  focuses  on  the  unique  relationships  and 

synergies between natural  and built environments, with  a particular  interest  in  teaching  and 

research to support improved environmental and socio‐economic sustainability for the future. 

 

The School  is  located across two campuses –  in the heart of Adelaide at the City East Campus 

and at the expanding and vibrant new suburb of Mawson Lakes on the northern  fringe of the 

City. As part of the Division of Information Technology, Engineering and the Environment (ITEE), 

the School offers applied and  relevant programs  that  take  students out of  the classroom and 

into the field. 

 

Civil Engineering 

Civil  Engineering  programs  place  particular  emphasis  on  the  application  of  theory  through 

focused project  and  assignment work. By  the  final  year of  the degrees,  fifty per  cent of  the 

courses  are  project  based  including  a major  industry  related  research  project  and  a  design 

project that models  industry experience. This strong  industry focus ensures that graduates are 

already  familiar  with  the  industry  needs  and  modes  of  operation  when  they  commence 

employment.  The  programs  are  accredited  by  Engineers  Australia.  Industry  links  include 

Department of Transport, Energy &  Infrastructure  (DTEI), SA Water and Built Environs  ‐ all of 

whom  provide  scholarships  for  students  in  the  program.  UniSA  coordinate  regular  industry 

lectures as well as industry sponsored student projects. 

 

Construction Management and Economics 

Construction Management and Economics at UniSA offers  the only construction management 

degrees  in  South Australia  and  is one of  the most  accredited  construction management  and 

economics programs  in Australia. Students  can  study a broad  range of  courses,  including  the 

study  of  sophisticated  construction  techniques,  surveying  and  estimating,  design  economics, 

contract  administration,  project  management,  planning  and  more.  All  undergraduate  and 

postgraduate  programs  provide  the  education  and  training  required  to  reach  a  professional 

level and have a number of key  industry  links. The Bachelor of Construction Management and 

Economics program maintains a 100% employment rate. 

 

 

 

 

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vii  

Environmental Management and Sustainability 

UniSA  offers  four  specialised  programs  in  the  field  of  Environmental  Management  and 

Sustainability ‐ Biodiversity and Park Management, Environmental Protection and Management, 

Geospatial  Information Systems, and Geographical and Earth Systems. All four awards provide 

students with a broad understanding of environmental  issues and share a common  first year, 

allowing the flexibility to move between the awards as career aspirations become clear. 

 

Graduates will be qualified to work in a wide variety of positions related to the natural and built 

environment and the multi‐disciplinary nature of the programs, as well as the strong focus on 

practical components of learning and active fieldwork, provides expertise in the natural, spatial 

and  social  sciences.  Graduates  are  employed  in  the  private  and  government  sector  in  all 

Australian states and several overseas countries. 

 

Transport Systems Engineering 

The Transport Systems Engineering program  is designed  to provide Masters  level expertise  in 

the  planning,  designing  and  managing  of  transport  systems  and  continuing  education  for 

graduate students with professional  interest  in the area of transport systems engineering and 

transport planning. The coursework enhances  the concepts and  theory  in different aspects of 

traffic and transport engineering and students develop the capacity to undertake  independent 

research and the ability to analyse and report on research procedures and findings. 

 

Urban and Regional Planning 

Urban  and Regional Planning  at UniSA  is home  to  the  longest‐established planning  school  in 

Australia and celebrates sixty years of planning education in 2009. Both the undergraduate and 

postgraduate  programs  incorporate  a  range  of  teaching  techniques  focused  on  providing 

students with  the best possible conditions to advance their  learning. Students undertake  field 

trips, engage in collaborative projects, and are taught a number of professional skills courses by 

highly qualified planners. A work placement program has been built  into the bachelors degree 

which  provides  students  with  an  opportunity  to  work  alongside  qualified  planners  for  an 

extended  period  of  time.  The  Planning  programs  are  strongly  supported  by  the  Planning 

Institute  of Australia,  the  national  body  that  accredits  professional  planners.  There  is  also  a 

strong  ‘Young Planners’ group, which  represents  recent graduates and  is closely  linked  to  the 

student‐governed ‘Organisation of Planning Students’. 

 

    

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viii  

 

 

                  

Presentation Program 

Thursday, 9th April  

12:00pm   Registration 

12:20am  Welcome: Professor Patrick James, Head of School

12:30am  Introduction from Postgraduate Representatives, Susan Irvine & Michael Heath 

12:40pm  Lunch 

1:10am  Student Poster Presentation and Question Time 

1:40am  Discussion of Posters Led by Professor Chris Daniels

2.10pm  Afternoon Tea  

2:30pm  Talking Research with Professor Nanthi Bolan, UniSA Dean of Graduate Studies  

2:45pm  Student Poster Awards 

3:00pm  Research Degree Coordinators Address New Students, Dr Fleur Tiver (RDC Mawson Lakes) & Dr Sadasivam Karuppannan (RDC City East)  

3.30pm  Close  

     

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Posters 

1

Page 11: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

Abstract:The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher than the 14C ages. The problem is global and can be attributed either to using inaccurate initial 36Cl and 14C values or to applying inaccurate in-aquifer 36Cl and/or 14C evolution model/s. This work, for the first time, presents similar 36Cl and 14C ages for Great Artesian Basin (GAB) groundwater at Dalhousie, South Australia, using initial 36Cl and 14C values from the recharge area and assuming subsurface addition of 36Cl-free Cl .

Figure 1 Proposed 36Cl/Cl evolution models in the southwestern Great Ar-tesian Basin.

U. A. Abu Risha School of Natural & Built Environment, The University of South Australia

The majority of previous studies attrib-ute the evolution of groundwater initial 36Cl/Cl ratios to: 1. the decay of the initial 36Cl, and2. the transfer of hypogenic 36Cl into

groundwater from aquifer rocks.Three models were found to account for the evolution of the assumed 36Cl/Cl initial ratios measured in the Sandy and Claude wells which occur in the GAB recharge area, to the ratios ob-served in the Dalhousie Springs within times similar to the 14C ages (Figure 1). The Sandy well model assumes subsurface 36Cl-free Cl addition to the groundwater at a rate of 5 mg/l/ka (1000 years). The Claude well models assume subsurface 36Cl-free Cl addi-tion rates of 5 and 10 mg/l/ka.

Figure 5 Comparison between the 14Cages and the 36Cl ages estimated assum-ing initial 36Cl/Cl ratio similar to the Claude well ratio and subsurface 36Cl-freeCl addition rates of 5 & 10 mg/l/ka.

The differences between the esti-mated 14C and 36Cl ages are < 5 ka (Figures 4 and 5) which can be re-garded as a breakthrough in ground-water dating studies.The atmospheric 36Cl/Cl ratios can-not represent the initial groundwater ratio because they are: (1) quite dif-ferent from the recharge area groundwater ratios. and (2) widely variable both spatially and temporally (Keywood, 1995). The ratios of the Claude and Sandy wells are similar to the ratios of the Finke River flood-water (Radke et al. 2000).

Figure 2 14C ages-36Cl/Cl ratio plots of the Dalhousie Springs in the evo-lution time space of the initial 36Cl/Clratio measured in the Claude well as-suming subsurface 36Cl-free Cl rates of 5, 10, and 20 mg/l/ka.

To link the 14C ages to the 36Cl/Cl evo-lution models, the14C ages were plot-ted versus the measured 36Cl/Cl ratios on the initial 36Cl/Cl evolution plots (Figure 2 and 3). It is clear that the Sandy model assuming subsurface 36Cl-free Cl addition rate of 5 mg/l/ka is better than the other models and its ages are closer to the 14C ages. This method provides a means to check the validity of the assumed 36Cl-free Cl ad-dition rates. The actual addition rates to the samples plot to the right of a given model curve are less than the assumed rate of this model whereas the addition rates of the samples plot to the left of the curves are higher than the assumed rates.

Figure 2 14C ages-36Cl/Cl ratio plots of the Dalhousie Springs in the evolu-tion time space of the initial 36Cl/Clratio measured in the Sandy well as-suming subsurface 36Cl-free Cl rates of 5 and 10 mg/l/ka.

Dating 14C– bearing groundwater using 36Cl

Figure 4 Comparison between the 14Cages and the 36Cl ages estimated assum-ing initial 36Cl/Cl ratio similar to the Sandy well ratio and subsurface 36Cl-free Cl addi-tion rate of 5 mg/l/ka.

Conclusions14C and 36Cl are natural radioactive isotopes. After entering an aquifer, they start to decay. If the initial 36Cl/Cl ratio decline is only due to decay, it cannot be measured before the pas-sage of 60 ka. By then all the initial 14C is ex-pected to be decayed. However, this condi-tion is rare in nature and the addition of 36Cl-free Cl or mixing with old saline groundwater can cause 36Cl/Cl measurable differences within the limits of the 14C ages.

Acknowledgements Thanks are due to my supervisors Dr. Ian Clark and Prof. Simon Beecham.

RecommendationsThe atmospheric chemical deposition studies in Central Australia focused only on the rain-fall events of normal magnitudes (e.g. Hutton, 1986; Keywood, 1995). The develop-ment of freshwater bodies below the ephem-eral rivers in the GAB reflects the need for studying floodwater chemistry in this region.

References Hutton, JT 1983, 'Soluble ions in rainwater collected near Alice Springs, N.T., and their relation to locally derived atmospheric dust', Transactions of the Royal Society of South Australia, vol. 107, p. 138. Keywood, MD 1995, 'Origins and sources of atmospheric precipitation from Australia: chloride-36 and major-element chemistry', PhD Thesis, Australian National University. Radke, BM, Ferguson, J, Cresswell, RG, Ransley, TR & Habermehl, MA 2000, Hydrochemistry and Implied Hydrodynamics of the Cadna-owie-Hooray Aquifer, Great Artesian Basin, Bureau of Rural Sciences, Can-berra.

2

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6. Research theoretical frameworkThis research employs communicative planning theory to draws on Haber-mas’ theory to engage Af-rican migrants in a discus-sion of their experiences & their interpretations of housing conditions in re-lation to bureaucratic de-

cisions & how com-municative tensions might affect them.My aim is to seek a consensus on how best to address ten-sions between or-ganisations that me-diate between Afri-can migrants & af-fordable housing &

1. Aim and objective of the re-search

The research’s major aim and objec-tive is to empirically explore the housing related issues that could present themselves through data collected from African migrants. The research identifies & examinesThe challenges by drawing onCommunicative action theory.

4. Literature review Many of African migrants arrived in Australia as part of the federal government humanitarian pro-gram in response to political crisis & civil wars in Africa. Before reaching Australia, many of them spent several years in refugee camps after fleeing their countries of origin. The housing crisis in the African community is the result of many factors. Among these are issues with obtaining paid work.

2. Research limitationsLiterature & studies of African refugees have focused on health & education issues with modest focus on how housing issues matter for durable settlement of Africans, or the relationship of housing to health & education. This research will add to exist-ing literature and academic knowledge es-pecially in the field of urban & regional

Housing pathways and community integration of African refugees in Australia: Towards an understanding of African refugee housing issues

African families traditionally live in an extended familysituation. They need an affordable home for successful settlement and integration in Australia. New housing stocks are required to meet the housing needs of African migrants as much of current housing stock in Australia do not suit large families.

Map indicates patterns of African migration to South Australia over recent

3. The significance of the researchThis research serves two functions, i.e. to contribute to the existingrefugee migration field of studies & to address limitation of housingliterature particularly in relation to African refugees in Australia. It aims to provide conclusions & recommen-dations that will be based on sound research findings.

5. Research methodologyIn order to effectively investigate the housing experiences of the African refu-gees in Australia this research under-takes a case study of African refugees in Adelaide, South Australia. In-depth semi-structured interviews will be the primary means of data collection. The case study will involve 20 semi-structured interviews with purposively selected African migrants from refugee backgrounds.

7. Results and discussionData analysis focuses upon two key areas: housing needs as an indicator to community integration & demand, and other social problems confronting African migrants in the wider Australian society. It discusses the nature of household demand specifically in relation to family structure and household size. The analysis will pay particular attention to economic andsocial capital. Close examination of such factors will offer effective understanding of African migrants’ housing situation in the context of Australian social policy.

Paul Atem is a PhD scholar in planning discipline. Paul came to Australia as a refugee from Sudan & he’s interested in the field of migration & international sustainabledevelopment. Paul’s PhD supervisors are Dr. Lou Wilson & Dr. Andrew Allan

Email: [email protected]

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Prepared By: Zainul Mukrim Baharuddin PhD Planning

[email protected]

Supervisors:Dr Alpana Sivam, Dr Sadasivam Karuppannanand Prof Chris Daniels

RESEARCH METHODOLOGY

INTERVIEW

STAKE-HOLDERS

STATEMENT OF THE PROBLEMS

RESEARCH OBJECTIVES

URBAN GREEN

SPACE

SOCIAL and HEALTH ENVIRONMENTAL

ECONOMIC

Study of Kuala Lumpur and comparison with Adelaide.

Social

Attributes

Environmental

Attributes

Park

Visitors

Government

Non–

Government

QUESTIONNAIRE

CitizensPark

Visitors

LANDSCAPE

OBSERVATION

1

2

RESULT AND RECOMMENDATION

The aim

of this research is to explore urban green spaces and people’s attitudes

toward wildlife in Kuala Lumpur,

Malaysia and to compare this to the scenario in Adelaide,

South Australia.

Focus Groups :

NGOs and Built

Environment Professionals

1) Open space planning In Malaysia, urban green space has received little atten-tion in future planning. Large cities such as Kuala Lum-pur aim ambitiously to be a ‘Garden City’ by 2020 (Draft KLSP 2020). However, urban green space planning has been implemented to fulfil predominantly the social needs of people and less consideration to environmental aspects such as wildlife and biodiversity, woodlands and wetlands.

2) Urban green space conservation Urban green space is decreasing due to pressures of rapid population growth, residential and commercial de-velopments. If this trend continues it will invariably af-fect the health and sustainability of the urban environ-ment and lead to long-term damage of the natural habi-tat (Pauleit 2003, Tratalos 2007 and McKinney 2008). Due to the decline in the amount of urban green space many problems occur such as floods, air and noise pol-lution and social and health issues.

3) Demand on Urban Green Space literature

There are not many published scientific researches re-lating to environmental matters of urban green space. For example, in the last sixteen years these issues were not highlighted in the Journal of Landscape and Urban Planning (Chiesura 2004; Matsuoka & Kaplan 2008).This shows that little intension and contribution by profes-sional on the environmental issues, (Brown 2005). How-ever, Swanwick et al (2003) and Bell et al (2007) argue that it has been addressed in other studies, particularly those emanating from the UK.

4) Attitude on Urban green space

Urban green space is crucial to sustainable city because it involves social, economic and environmental issues and if managed properly, has ecological benefits for its inhabitants. Professionals and other citizens are well aware of the values of urban green space and its promo-tion of social integration, community development and environmental protection (Swanwick 2003 and Balram 2005). However, many countries currently have little knowledge about environment conservation (Niemela 1999) and there is little understanding or agreement of this concept among built environment professionals (Brown 2005).

National Land-scape Dept (JLN)

City Hall of

Kuala lumpur (DBKL)

-————————————————————————————————————————————————————

1. To identify the perception of the stakeholder and citi-

zens regarding on the social and environmental bene-

fits of various urban green spaces.

2. To recognize the perceptions/attitudes of stakeholders

and public toward wildlife in urban green spaces.

3. To explore why do ecological con-

cerns of urban green space receive

little intention from citizens and

stakeholders?

CONCLUSION

This research will investigate perceptions of various stakeholders and urban dwellers in Kuala Lumpur, Ma-laysia and Adelaide, Australia. It will make a comparison of both cities’ policies regarding urban open spaces and their implications for urban policy development. Both cities are aware that it is important in an era of increas-ing urbanization to provide more peaceful and sustain-able urban environments. Guidelines will be suggested for making attainable urban open space and more gen-erally in improving people’s knowledge of the environ-ments they live in.

-————————————————————————————————————————————————————

4

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100 1000 10000 100000

UV�Abs�@

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nm

Apparent�Molecular�Weight

Myponga�raw

Myponga�raw

VHA

SHA

CHA

NEU

zz

Procedures:�

Treated�water�

Raw�water�

5

Page 15: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

Clues from the past witha view to the future

M.N. Binnie, School of Natural and Built Environments, University of South Australia, Mawson Lakes, SA 5095

IntroductionUnderstanding modern environments provides

information that may enable interpretation of ancient

environments. For example, investigating signals of the

past may contribute to a better understanding of Earth

and current climate change. This in turn, may allow

predictions of future sea-level changes. Foraminifera are

potentially useful tools for such investigations.

PurposeAspects of this research was designed to:

�� Investigate the distribution pattern of modern foraminifera

in an estuarine environment.

�� Determine the species of foraminifera that have potential

for use as indicators of euryhaline conditions, that is, able

to tolerate a broad range of salinity.

Results from this project will provide additional data on the

distribution of benthic foraminifera in modern environments

and broaden the main investigation into ancient sea-levels in

Spencer Gulf, South Australia.

Foraminifera are single celled organisms which construct shell-like

tests (Figs. 3 & 4). They predominantly occur in marine

environments, from estuaries to open oceans and also in saline

lakes. Species distribution is related to water depth, which is a

primary factor that controls such parameters as salinity,

temperature, dissolved gases, light and plant distribution. Their

wide, geographical distribution and abundance makes them ideal

proxies for palaeo-environment analysis and interpretations.

Study Site Onkaparinga Estuary (Fig. 1) is situated approximately 35

km south of Adelaide and consists of a tidal channel with

adjacent tidal flats, salt marshes, artificial wetlands and

open water. The estuary is 10.5 km long and extends from

Old Noarlunga to the mouth (Fig. 2) at Port Noarlunga (DEH

2005). It is a tidal dominated, open estuary and is host to a

variety of birdlife, invertebrates and fishes.

PhD Geology Candidate, investigating benthic foraminiferal assemblages as environmental indicators to interpret Holocene sea-level changes in Spencer Gulf, South Australia.

AcknowledgementsProfessor John Cann — Principal Supervisor. Assoc. Professor Jim Jago — Associate Supervisor. William Shackleton — Critical Review. Graham Nash — ANU. UniSA —funding and resources to conduct this research. Dept. Ed., Science & Training —Research Training Scheme.

Discussion & Conclusion Estuarine parameters are variable. For example, salinity can

reach to levels greater than 37 ‰ in the upper reaches

depending on seasonality and daily tidal influences. Species

such as E. excavatum are tolerant to and exploit such

conditions, hence dominate the foraminiferal assemblage.

These same species that are present in modern estuaries

are also preserved as fossils in sediment cores thus

providing clues to past environments.

Fig. 6 Selected pie diagrams illustrating dominant species; upper estuary.

ResultsSurficial sediment samples were taken from 8 sites along

the estuary. Preliminary results indicate low species

diversity in the upper estuary (Fig. 5) where it is

dominated by Elphidium excavatum and Ammonia beccarii

(Fig. 6). In contrast, species diversity is greatest in the

lower regions closer to the estuary mouth.

Fig. 2 Mouth of Onkaparinga Estuary

Fig. 5 Sample site 2Onkaparinga Estuary

Fig. 1 Location Map

F i g . 3 M a r g i n o p o r a vertebralis & Baculogypsina spp. are characteristic of tropical seas.

Fig. 4 Peneroplis planatusis characteristic of seagrass meadows.

Reference: Dept for Environment & Heritage 2005. Onkaparinga Estuary Information Package.

Onkaparinga�Estuary�Site�2

7%

57%

32%

5%

Ammonia beccarii

Elphidium excavatum

Other species Triloculina inflata 9%

31%

43%

11%

6%

Elphidium excavatum

Ammonia beccarii

Triloculina inflata

Ammobaculites barwonensis Other species

Onkaparinga�Estuary�Site�3

6

Page 16: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

Method 1: Using the principles of Participatory GIS and Continuous Improvement, construct a value stream to determine theeffectiveness of GIS within ILC business processes and constituent parts, then communicate the results to the ILC

NB The communication is a work in progress. Below is a template that will be used to convey the efficiency savings to the

ILC. The final version of the template will be an interactive poster where ILC personnel will be allowed to

navigate to relevant information by clicking on the different tabs & buttons, including videos to compare current business

processes against proposed GIS orientated processes.

Aim 1:Contribute to the ILC’s land acquisition and land management processes by identifying opportunities to increase the

application of GIS and methodologies as a means of maximising benefits for Indigenous people.

Introduction

Main Findings

Conclusion

People, land, opportunity ………….. The Indigenous Land Corporation (ILC) assists Indigenous people to derive lasting economic, social, environmental and cul-tural benefits from owning and managing their land. Creating training and employment opportunities is central to achieving these benefits now and for future generations

Shirley McPherson ILC Chairperson 2009

Hammer and Champy (2003) defineContinuous Improvement (or Kaizen inJapanese) as a quality improvementprogram that seeks to enhance existing processes within a current organisational framework in order to make thatorganisation ‘lean’ and eliminate waste.

ReferencesHammer, M & Champy, J 2003, Reengineering the Cooperation, Harper Collins, New York

Nietschmann, B 1995 ‘Defending the Miskito Reefs with maps and GIS Mapping With Sail, Scuba and

Satellite’, Cultural Survival Quarterly

Rambaldi G, Kwaku Kyem,AP, McCall M, & Weiner D 2006 Participatory Spatial Information

Management and communication in Developing Countries , EJISDC

Research question: To what extent can encouraging organisational participation in Geospatial Information Systems (GIS) improve the ILC’s land acquisition and management business processes?

Objective 1: Review and examine the ILC business processes e.g. Land Acquisition, Land Management and Reporting.

Improved delivery of ILC programs

PGIS practice is geared towardscommunity empowerment through measured, demand driven, user friendly and integrated applications of geo-spatial technologies

Rambaldi et al (2006)

The Barbara Hardy Centre forSustainable Urban Environments

+ = http://www.iapad.org/mapping_and_gps.htm √

More Indigenous territory has been

claimed by maps than by guns. This as-

sertion has its corollary: more Indigenous

territory can be reclaimed and defended

by maps than by guns. Whereas maps like

guns must be accurate, they have the ad-

ditional advantages that they are inexpen-

sive, don't require a permit, can be openly

carried and used, internationally neutralize

the invader's one-sided legalistic claims,

and can be duplicated and transmitted

electronically which defies all borders, all

pretexts, and all occupations.

(Nietschmann, 1995)

Adapted from original image “Impact of colonisation’ program ©Migration Museum & Method Media

7

Page 17: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

Barriers to Local Governments’ Action to address Climate Change

Climate Change and Local Governments

The issue of climate change and the need to reduce emissions of greenhouse gases (GHGs) has in recent years become a key area of concern for communities in Australia. The Intergovernmental Panel on Climate Change (IPCC 2007) reported that

“the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations and that discernible human influences now extend to other aspects of climate including ocean warming,

continental-average temperatures, temperature extremes and wind patterns.” Although climate change is a global issue the contributing factors arise through local action, particularly the use of energy from fossil fuels. While state planning strategies dictate the direction and priorities for planning communities into the future, these are then incorporated into development plans and policies for implementation by each local government agency. Australian local government is the statutory body primarily responsible for jurisdictional planning decisions and shaping the future character of the local built and natural environments (Critchley and Scott 2005).

‘Ideal’ Local Action

A questionnaire was posted to Chief Executives of each metropolitan local government (Councils) in South Australia (SA) and Victoria (Vic) in April 2008. Responses were received from 18 of the 20 SA Councils (90%) and from 19 of the 28 Vic Councils (70%). In response to the question:

“In an ideal world, what process or measure do you think local government needs to implement to make a

positive impact on climate change?” a variety of responses were received. These have been summarised in Figures 1 and 2.

0 1 2 3 4 5 6 7 8

Council�Leadership/�Example

Vehicle�Fuel�Efficiency

Streetlighting

Household�Energy�Efficiency

Planning�Policy

Information�&�Education

Mobilise�Community

Renewable�Energy

Monitoring�and�Feedback�of�information�on�energy�use�

Advocacy�to�higher�levels�of�Govt

Implement�adaptation�programs

Develop�policy�position�and�action�plan

Number�of�Councils

SA�Councils�� Ideal�Process�or�Measure

Figure 1. Ideal process or measure nominated by SA Councils to make a positive impact on climate change

0 1 2 3 4 5 6 7 8

Council�Leadership�/Example

Vehicle�Fuel��Efficiency

Transport�Infrastructure��&�Access

Streetlighting

Building��Design

Household�Energy�Efficiency

Planning��Policy

Information�&�Education

Industry�Assistance

Planting�Trees/�Street�Trees�/retain�trees

Water��Management

Mobilise�Community

Purchase��GreenPower

Renewable��Energy

Divert�green�waste��/organic�waste��from�landfill

Stricter�Targets

Monitoring�and�Feedback�of�information�on�energy�use�

Implement�action�plan

Number�of�Councils

Vic�Councils�� Ideal�Process�or�Measure

Figure 2. Ideal process or measure nominated by Vic Councils to make a positive impact on climate change

Barriers to Implementation

When asked the question:

“In your opinion, what are the barriers to local government implementing the ideal process or

measure?” the responses from Councils were also varied. These are summarized in Figures 3 and 4. These barriers are mainly financial, political, institutional, infrastructural or social. These findings support that of other research studies concluding that the barriers to implementing measures to address climate change at the local level are generally not technological.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Insufficient�funding

Councillor�lack�of�knowledge

Limited�people�resources

Not�a�priority�� community

Lack�of�political�will�/�support�at�higher�levels�of�Govt

Jursidictional�&�institutional�barriers

Better�networks�and�partnerships�needed

Lack�of�data�at�regional�level

Senior�Management�not�committed

GHG�seen�as�an�environmental�issue

Number�of�Councils

SA�Councils�� Barriers

Figure 3. Barriers to implementation (of ideal process or measure) nominated by SA Councils

Figure 4. Barriers to implementation (of ideal process or measure) nominated by Vic Councils

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Insufficient�funding

Councillor�lack�of�knowledge

Lack�of�information�on�alternative�technologies

Limited�people�resources

Not�a�priority�� community

Lack�of�political�will�/�support�at�higher�levels�of�Govt

Political�power�of�housing�and�development�industry

Vic�Civil�&�Admin�Tribunal

Capture�of�Govt�by�Fossil�Fuel�Lobby

Privatization�of�electricity�generators

FBT�Rules�Vehicles

Jursidictional�&�institutional�barriers

Number�of�Councils

Vic�Councils�� Barriers

2008 GHGs

2030 Target

2020 Target

2050 Target

Cathryn Hamilton PhD Candidate, School of Natural and Built Environments, University of South Australia, Adelaide, South Australia

Supervisors: Assoc Prof Jon Kellett, Prof Steve Hamnett

Acknowledgements: PhD Research funded by the ARC Linkage Project: Carbon Neutral Communities—Making the Transition. Project Partners - UniSA, RMIT University, City of Playford, Manningham City Council, ICLEI—CCP Australia, Moreland Energy Foundation Limited, Northern Alliance of Greenhouse Action, Consumer Affairs Victoria and Community Power.

References: IPCC (2007) Climate Change 2007: The Physical Science Basis. Summary for Policymakers. [http://www.ipcc.ch last accessed 26 July 2007] CRITCHLEY, V. & SCOTT, J. (2005) Changing governments: Councils embracing the precautionary principle. IN KEEN, M., BROWN, V. A. & DYBALL, R. (Eds.) Social learning in environmental management: towards a sustainable future. London, Earthscan.

Political Financial

Infrastructural Institutional

Social

8

Page 18: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

Direct�seed�mix�treatments�for�restoration�of�vacant�

agricultural�land�

Ph.D.�Project�Partners:�Australian�Defence�Force�Department�of�WLB&C�

Rural�Solutions�SA�

Michael�J.�Heath�B.Ap.Sci.(Hons)��Dr�Fleur�Tiver�(Supervisor)��Ms.�Joan�Gibbs�(Associate�Supervisor)�

Biography�from�the�Author:�

I�graduated�from�a�Bachelor�of�Applied�Science�in�Biodiversity,�Environmental�and�Park�

Management�from�the�University�of�South�Australia�in�2005.�After�graduating�I�����������

commenced�work�for�the�South�Australian�Research�and�Development�Institute�(SARDI)�

being�involved�with�genetic�resources�and�sustainable�technologies.�In�2007�I�returned�to�

UniSA�to�complete�an�Honours�Degree�investigating�mine�site�rehabilitation,�then�com�

mencing�my�Ph.D.�Candidature�in�2008.�Throughout�this�time�I�have�committed�to�volun�

tary�work�with�the�Compass�Creek�Care�landcare�group.�

The�AIM�of�this�project�is�to�monitor�and�compare�the�effectiveness�of�sowing�a�low�and�a�high�����������

diversity�native�seed�mix�for�the�restoration�of�a�agriculturally�degraded�site�to�a�state�most�

similar�to�that�of�neighbouring�remnant�ecosystems�and�previously�revegetated�sites.�A�KEY���

OUTCOME�IS�THE�RE�ESTABLISHMENT�OF�LANDSCAPE�SUSTAINABILITY,�BIODIVERSITY�AND�

ECOSYSTEM�FUNCTIONS�PRESENT�BEFORE�DISTURBANCE.�

MONITORING��of�experimental�sites�includes�Vascular�Plants,�Invertebrates,����������

Mycorrhizal�Fungi�and�Soil�Physical�and�Chemical�Properties.�These�BIOINDICATORS�have�

been�chosen�due�to�their�role�in�energy�capture,�nutrient�and�water�cycling,�landscape�

stability,�habitat,�plant�growth,�reproduction�and�establishment,�and�the�food�chain.�

HIGH�DIVERSITY��Acacia�hakeoides�

Acacia�ligulata�

Acacia�oswaldii�

Atriplex�nummularia�

Atriplex�paludosa�

Eucalyptus�gracilis�

Eucalyptus�porosa�

Maireana�brevifolia�

Melaleuca�lanceolata�

Myoporum�insulare�

Nitraria�billardierei�

Pittosporum�angustifolium�

Rhagodia�parabolica�

Acacia�notabilis�

Adriana�klotzschii�

Alyxia�buxifolia�

Eucalyptus�socialis�

Geijera�linearifolia�

Scaevola�spinescens�

Lawrencia�squamata�

LOW�DIVERSITY��Acacia�hakeoides�

Acacia�ligulata�

Acacia�oswaldii�

Atriplex�nummularia�

Atriplex�paludosa�

Eucalyptus�gracilis�

Eucalyptus�porosa�

Maireana�brevifolia�

Melaleuca�lanceolata�

Myoporum�insulare�

Nitraria�billardierei�

Pittosporum�angustifolium�

Rhagodia�parabolica�

Local�provenance�seed�mix�species�tested�

VASCULAR�PLANT�monitoring�����������������

incorporates�the�analysis�of�Density,�������

Percentage�Cover,�Frequency,�Species�

Richness,�Species�Diversity�and�����������

Percentage�of�Exotics.�INVERTEBRATE�

monitoring�includes�Abundance,�Species�

Richness�and�Species�Diversity.�The�����

frequency�of�native�plant�root�infection�

with�MYCORRHIZAL�FUNGI�is�surveyed.�

SOIL�analysis�includes�soil�type,�grain�

size,�organic�carbon�content,�pH�and�����

available�nutrients�and�elements.� Vascular�plant�community�

Invertebrate�trap�

�Mycorrhizal�infection�

Soil�grain�size�test�

PROJECT�SITE�

The�project�site�is�located�at�the���������

Australian�Defence�Forces�Proof�and���

Experimental�Establishment�in�the�dis�

trict�of�Port�Wakefield,�South�Australia.�

The�site�is�95km�from�the�Adelaide�CBD.�

The�region�is�classified�as�semi�arid.�

EXPERIMENTAL�DESIGN�

������������ �������� �

������� �� ���������� �

������������������������

�� ����������������������

� ���������������� ���������

��� ������� ����!!����!!�

� �������������������

��������������"������

������������������"�

��������#�������

$�������� ������ ������

���%����������������� ���

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��������������������

9

Page 19: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

Vehicles of the future Technologies based on Internal Combustion En-

gine (ICE) Gasoline engine

Direct Ignition (DI) Features: advanced injection technology, additional nitrogen oxide

after-treatment necessitated by lean burning, spark ignition en-gines with variable and electro-mechanical valve trains, reduced friction technologies, displacement-on-demand, turbocharging, multispeed transmissions

Improved performance: engine shut-off at idle without hybridization, improved energy utilization

Timeframe: 2010 + Control Auto Ignition (CAI)

Features: sophisticated De-NOx after treatment Improved performance: sophisticated energy utilization Timeframe: 2020 +

Diesel engineDirect Ignition (DI)

Features: high turbo-charging, inter-cooling, downsizing Improved performance: improved energy utilization Timeframe: 2010 +

Homogenous Charge Compression Ignition (HCCI) Features: advanced combustion process Improved performance: sophisticated energy utilization Timeframe: 2015 +

Hybrid Electric Vehicle (HEV)Features: electric motor, battery, Continuously Variable Transmis-

sion (CVT) Improved performance: engine shut off, low speed efficiency, re-

generate energy Timeframe: 2010 +

Fuel cells (FC)Features: Fuel cell systems Improved performance: zero tailpipe emissions, potential zero well-

to-wheel emissions Timeframe: 2030 +

Fuels of the future Internal combustion engine (ICE) fuels using ex-

isting fuel infrastructure Low sulphur gasoline and diesel

Benefits: lean burn gasoline engine; ultra clean diesel engine Challenges: energy intensive desulphurisation Timeframe: 2010 +

Fischer-Tropsch (FT) process diesel Benefits: favourable emissions characteristics; reduced fuel con-

sumptionChallenges: energy intensive FT process with higher CO2 emissions Timeframe: 2020 +

Conventional biofuels Benefits: carbon neutral (in theory) Challenges: limits by land and water resources availability; the diffi-

culty of assessing accurately GHG reduction; the difficulty to achieve economies of scale because of the logistic of biofuel pro-duction

Timeframe: 2015 + Advanced biofuels

Benefits: potential to use wide range of biomass, including waste (“biomass to liquid” – BTL); potential to be market competitive with conventional gasoline and diesel

Challenges: highly uncertain future – not proven on a commercial scale; required very large scale optimisation

Timeframe: 2030 + ICE fuels requiring separate fuel infrastructure –

LPG, CNG, H2Challenges: long term benefits from these fuels are limited Timeframe: interim implementation

Fuel cells fuels Benefits: zero tailpipe emissions Challenges: storage not suitable for mass production vehicles, en-

ergy intense hydrogen production Timeframe: 2030 +

MotivationMitigation towards sustainable transport is particularly challenging task that Australia is currently facing and will face in the next several decades. However, if this problem is not addressed adequately now, the potential rise of transport GHG emission will jeopardise GHG emission reductions that could be achieved in other sectors of the economy with costly efforts. In the expected conditions of growing demand for transport services the most appropriate action to contain transport GHG emissions within the required limits is to effectively miti-gate to more GHG efficient Australian vehicle fleet.

I. Knowledge Base

II. Methodology

Projection of “well-to-wheel” road transport greenhouse emissions which offers following advantages:

�� Dynamic and interactive modeling for pre-diction the evolution of different vehicle propulsion systems and fuel combinations.

�� Dynamic modeling of emissions trading - Iterative update of emissions permits de-mand.

�� Utalisation of realistic disaggregated emis-sions factors for different vehicles classes bases on typical driving conditions.

Well-to-Wheel (Well-To-Tank + Tank-To-Wheel) greenhouse emissions for various fuel and propulsion system combination

Source: Sustainable Mobility Project Calculations.

Ivan Iankov Institute for Sustainable System and Technologies

Transport Systems

University of South Australia

© 2009

10

Page 20: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

TODTOD - Transit Oriented Development‘Imagine a region made up of a network of great neighborhoods‘Imagine a region made up of a network of great neighborhoods——places where residents of diverse places where residents of diverse

incomes, ages and backgrounds have the option to walk to nearby shopping, parks and schools; where incomes, ages and backgrounds have the option to walk to nearby shopping, parks and schools; where streets are safe to walk along and public spaces are beautiful, inviting and frequented; and where people streets are safe to walk along and public spaces are beautiful, inviting and frequented; and where people can choose to take a train or bus to their destinations as easily and conveniently as a car…can choose to take a train or bus to their destinations as easily and conveniently as a car… Achieving this vision will require new thinking about the way we plan our communities and Achieving this vision will require new thinking about the way we plan our communities and transportation systems…’transportation systems…’

What is TOD?What is TOD?

��Pedestrian & cycle friendly, higher density, mixed use development within walking distance oftransit*—there is no standard definition

��Many so-called TODS fall far short of their potential

��Dittmar & Poticha - 5 main goals: �� Location efficiency � Value capture � Resolution of tension between node & place

��Above all, ‘‘livability’livability’ - would YOU want to live and/or work there?

*Transit is the term used for public transport in the USA.

�� Rich mix of choices �� Place making

Why plan & build TOD?Why plan & build TOD?��Social benefits—reduced commuting time & stress, a range of

employment, services & community facilities nearby, more affordable housing options, social diversity, revitalised urban centres

��Environmental benefits—reduced vehicle emissions, pollution &resource consumption, more scope for recreation, greenspace,growing food

��Economic benefits—savings on infrastructure, reduced household transport costs, local economic vitality, increased property values, alternative to costly infrastructure and service provision on urban fringes

ObstaclesObstacles��Negative public perceptions, often of higher density,

may lead to opposition & costly delays��Developer and builder resistance to new trends,

increased cost of taller buildings ��Restrictive local government regulations and zoning ��Rising land values in TODs can squeeze out lower

income households ��Lack of balance between residential & commercial

uses threatens a viable, vibrant community ��Demand for park and ride facilities threaten walkability ��Lack of a stakeholder shared vision and collaboration

How to achieve TOD’s potential?How to achieve TOD’s potential?��A ‘Vision’ is essential, agreement on common goals, linking of

transport & housing policy at regional level ��Value genuine community consultation & consensus building to

avoid opposition & delays ��Forge partnerships between levels of government, developers,

not-for-profits, local people ��Embrace a comprehensive planning approach, employ leverage

to maximise public investment ��Enrich existing features, create diversity and choice, maintain a

‘people focus’, provide a wide range of services & amenities, keep it walkable

��Restrict car parking, ensure transit is excellent and varied

Refe ence :References:CORBETT, J. & ZYKOFSKY, P. (1996) Building Livable Communities: A

Policymaker's Guide to Transit—Oriented Development. Center For Livable Communities/ Local Government Commission, USA.

DITTMAR, H. & OHLAND, G. (Eds.) (2004) The new transit town: best practices in transit-oriented development, Washington DC. Island Press.

Sue Irvine is a PhD candidate in Planning at the School of Natural and Built Environments, University of South Australia. She is researching the locational aspects of lifetime affordable housing. March 2009. [email protected]

Light Rail Transit and surrounding TOD in Portland. The Transit Coalition LA 2008

‘‘Building near transit has been identified as one of the major Building near transit has been identified as one of the major ingredients in creating a “livable community”… places where ingredients in creating a “livable community”… places where

we enjoy living, working and playing.’we enjoy living, working and playing.’

One design puts people first, the other puts cars first...

Subiaco TOD, Perth - pedestrian & cycle friendly

Pedestrians, transit and cars can co-exist in an orderly, attractive way

LivableHouston

The New Transit Town, pp20-21

Building Livable Communities, p1

11

Page 21: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

The�development�of�level�crossing�risk�index��Siti�Zaharah,�I.,�Yue,�W.L.�and�Sekhar,�S.V.C�

PhD�Candidate,�Institute�for�Sustainable�Systems�and�Technologies��Transport�Systems,�UniSA,�South�Australia,�5001�Australia�Senior�Lecturer,�Program�Director,�Institute�for�Sustainable�Systems�and�Technologies���Transport�Systems�,�UniSA�,�South�Australia,�5001�Australia�

Lecturer,�Division�of�Information�Technology,�Engineering�and�the�Environment,�UniSA,�South�Australia�5001�Australia�

Petri�nets�modelling�steps�

Introduction�Level�crossing�accidents�are�amongst�the�most�complex�issues�in�rail�safety,�due� to� its� unique� combinations�dealing�with� at� least� two�modes�of� trans�port.� The� functions� and� characteristics� of� the� two� components� and� their�corresponding� elements� represent� the� risk� at� level� crossings� locations.� In�this�research,�Petri�Nets�approach�will�be�applied� in�assisting�the�develop�ment� of� meaningful� model� and� risk� index� for� South� Australia� as� a� case�study.�

Objective�of�study�1.�To�determine�the�factors�effecting�safety�at�level�crossing—engineering�

factors,�human�factors�&�level�crossing�surrounding�environment�2.�To�developed�level�crossing�risk�index�for�South�Australia�

Approach�of�study�This�research�deals�with�a�formal�approach�based�on�Stochastic�Petri�nets.�This�approach�allow�combination�of�hardware,�software�and�hu�man�components�in�one�model.�Therefore�it�is�possible�to�determine,�for�example,�the�effect�of�failure�of�one�components�on�another�com�ponents.�The��qualitative�&�quantitative�analysis�can�also�be�analysed�at�the�same�time.��

Modelling�Tools�In�this�research,�the�Petri�nets�tool���tools�is�use�to�build�the�Petri�nets�model.�This�software�tool�is�suitable�for�creation�of�complex�models�and�for�analysing�of�their�deterministic�and�stochastic�temporal�behav�iour.���

Research�methodology�

Level�Crossing���Risk�Index�

South�Australia�case�study�� Approximately�1228�level�crossing�in�

South�Australia�Consisting�of;�� Active�crossing=�967�� Passive�crossing�=�261��

Conclusion�&�future�research�work��� Modelling�tool�—���Tools�allow�model�evaluation�using�Monte�Carlo�simu�

lation.���� Modelling�output—potential�accidents�obtained�should�be�realistic.�The�

result�will�be�compared�with�the�real�accident�data�&�ALCAM�model.��� The�model�will�be�tested�on�selected�locations�in�the�case�study�area.���� The�result�will�be�categorised�according�to�the�existing�characteristics�&�

parameters�considered�at�the�location,�and�level�crossing�risk�indices�for�South�Australia�will�be�developed.��

Build�into�Petri�nets�structure�using���Tools�

Outcomes�Potential�accident��

occurrence�Author�information�Siti�Zaharah�Ishak�is�a�PhD�Student�from�Institute�for�Sustainable�Sys�tems�and�Technologies—Transport�Systems,�University�Of�South�Aus�tralia.� She� received�a�Bachelor� in� Engineering� (Hons)�Civil� from�Uni�versiti�Teknologi�MARA,�Malaysia�and�a�MSc�in�Highway�and�Transpor�tation� Engineering� from� Universiti� Putra�Malaysia.� � She� is� currently�working�on�the�railroad�safety�engineering�studies.��

E�mail�:�[email protected]

Acknowledgement;�This�PhD�study�was�funded�by:�

ALCAM��Database��

GIS�output�on�level�crossing��surrounding�environment�factors�considered�

Petri�nets�modelling�structure�

South�Australia�

12

Page 22: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

The Research Field based research will use Chanticleer pear trees (Pyrus calleryana “Glen’s Form” Chanticleer) planted in winter 2009 in combination with three permeable pavement designs and a control of standard concrete block paving. Trees and soils will be monitored quarterly between 2009 and 2012. Soil moisture and soil oxygen levels will be used to compare conditions be-neath the permeable designs and the control; Tree growth will be analysed in relation to soil data. Root growth will be examined through par-tial non-destructive excavation during winter 2012.

Questions: ��How much water will permeable paving supply?��How much water can the soil store without compromising infrastructure foundations?��How will trees respond?�� ?

Integrating Natural and Built EnvironmentsIntegrating Natural and Built Environments

harnessing synergies between trees and civil infrastructureharnessing synergies between trees and civil infrastructure

Trees and footpaths don’t always make good Trees and footpaths don’t always make good neighbours. Conflicts can be hazardous, neighbours. Conflicts can be hazardous,

disruptive and expensive. disruptive and expensive.

The ProblemThe Problem The Solution?The Solution? Tree growth is responsive to environmental factors and is Tree growth is responsive to environmental factors and is largely predictable. Interactions between roots and largely predictable. Interactions between roots and infrastructure may therefore be manageable through treeinfrastructure may therefore be manageable through tree--sensitive urban design and innovative engineering practices.sensitive urban design and innovative engineering practices.

Permeable pavers may provide conditions which retard Permeable pavers may provide conditions which retard shallow root growth but encourage growth at depth, resulting shallow root growth but encourage growth at depth, resulting in increased clearances between roots and footpaths. in increased clearances between roots and footpaths. Balancing increased moisture infiltration with extraction by Balancing increased moisture infiltration with extraction by trees may result in improved tree health and longevity, trees may result in improved tree health and longevity, improved infrastructure stability, reduced infrastructure improved infrastructure stability, reduced infrastructure damage, and reduced discharge of stormwater and pollution damage, and reduced discharge of stormwater and pollution into receiving waters.into receiving waters.

Field trials of permeable pavement sections measuring 4m x Field trials of permeable pavement sections measuring 4m x 2m (shown below) will be constructed in winter 2009. 2m (shown below) will be constructed in winter 2009. Boreholes will enable monitoring of soil moisture and oxygen Boreholes will enable monitoring of soil moisture and oxygen levels at depths to 4m. A Callery pear (Pyrus calleryana) levels at depths to 4m. A Callery pear (Pyrus calleryana) sapling will be planted at each site. sapling will be planted at each site.

Permeable pavements will be tested against a control of Permeable pavements will be tested against a control of standard concrete block paving to determine influences on soil standard concrete block paving to determine influences on soil moisture and oxygen, tree growth and health. moisture and oxygen, tree growth and health.

Designs to be tested include an even 150mm deep permeable Designs to be tested include an even 150mm deep permeable base (above right) which is anticipated to produce an evenly base (above right) which is anticipated to produce an evenly distributed root growth pattern at depth, and permeable base distributed root growth pattern at depth, and permeable base materials formed into a swale (above left) which it is materials formed into a swale (above left) which it is anticipated may concentrate root growth parallel to kerbing anticipated may concentrate root growth parallel to kerbing and the footpath.and the footpath.

Soil conditions and tree growth will be monitored quarterly for Soil conditions and tree growth will be monitored quarterly for a period of three years. Roots will be examined following a period of three years. Roots will be examined following partial excavation after year three. partial excavation after year three.

Research title: Trees, Stormwater, Soil and Civil Infrastructure, Synergies Towards Sustainable Urban Design For a Changing Climate.

Research Supervisor: Dr. Donald Cameron BE, MEng, PhD , University of South Australia Co-Supervisor: Dr. Gregory Moore BSc.(Ed) BSc.(Hons), MBA, PhD , University of Melbourne

PhD Candidate: Tim Johnson DipHort (Arb), BAppSc, GDipAppSc, GDipOEd, GDipMgt. Working as a local government horticultural officer, regular exposure to the conflicts between green and grey infrastructure led to the development of this research project.

13

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Case Study 1:West End Gasworks(Qld)

Site Background �� Industrial – Gas Production

Sources of Contamination�� Petroleum Hydrocarbons (TPH), Monocyclic

Hydrocarbons (BTEX), Polycyclic Aromatic

Hydrocarbons (PAH), Ammonia Sludge, Naphthalene,

Cyanide Waste and Phenolic Material

The Remediation Process�� Excavation of contaminated fill

�� Residual contamination remaining in-situ

Use of Institutional Controls�� Site Management Plan

Statutory Framework�� Environment Protection Act 1994 (Qld)

�� Integrated Planning Act 1997 (Qld)

Case Study 2:Pasminco Cockle CreekSmelter (NSW)

Site Background �� Industrial – Lead smelting operation

Sources of Contamination�� Heavy Metals i.e. Lead and Zinc

The Remediation Process�� Excavation of contaminated fill

�� Capped Containment Cell

Use of Institutional Controls�� Costs of maintenance of cell funded under strata

titles or community titles legislation

Statutory Framework�� Contaminated Land Management Act 1997 (NSW)

�� State Environment Planning Policy 55 (SEPP 55)

Australian Contaminated Sites Law and Policy Case Studies

Sally Legg

Case Study 4:West Melbourne Gasworks(Vic)

Site Background�� Industrial – Gas Production

Sources of Contamination�� Polycyclic Aromatic Hydrocarbons, Monocyclic

Aromatic Compounds, Heavy Metal, Cyanide, Sulphate,

Acidity and Ammonia

The Remediation Process�� Excavation of contaminated fill

�� Importation of fill

Use of Institutional Controls�� Site Management Plan

�� Conditions in Audit Report

Statutory Framework�� Environment Protection Act 1970 (Vic)

Case Study 3: Bassendean (WA)

Site Background �� Iron and Steel Foundry

�� Engineering and servicing workshop including

metal work and finishing activities

Sources of Contamination�� Heavy Metals

The Remediation Process�� Excavation and off-site Disposal

�� In-situ retention below a geotextile marker mesh and

under road reserves

Use of Institutional Controls�� Memorial on Certificate of Title

�� Classification lodged in database

Statutory Framework�� Contaminated Sites Act 2003 (WA)

14

Page 24: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

Norfloxacin,an antibiotic

Fate and dynamics of Endocrine Disrupting Chemicals (EDCRs) and Pharmaceutically Active Compounds (PhACs) in the Soil EnvironmentPhD Candidate, Gareth Lewis; Principal Supervisor, Dr Albert Juhasz; Associate Supervisor, Dr Euan Smith.

H

O

H

H

H

H

CH3 O H

H

H

Waste products from urban and industrial activities pollute the Environment.

Adelaide Suburbs Sewage Industry Intensive Farming

Some pollutants, known as endocrine disrupting chemicals (EDCRs), in biosolids leach from amended land and can have adverse effects on aquatic biota.

Testis of male fish contain ovain otherwise normal testis tissue

17 �-estradiol, an EDCRproduced by female mammals

Antibiotics, are also present in biosolids and can potentially leach from biosolid-amended land to create an environmentin which multiple antibiotic resistant bacteria can develop.

The current research topic will study the fate, transport and potential biological impacts ofPhACs on the environment.

Results obtained will provide baseline data that can be used in future risk assessment processesassociated with biosolid–amendments of land in an Australian context.

EDCRs and antibiotics are collectively known as pharmaceutically active compounds (PhACs)

Adverse biological effect(s)

Biosolids, produced from sewage, and animal manure, from intensive farming, are applied to arable land as a fertilizer.

Application of biosolids to land

Urban and IndustrialActivities

Biosolidproduction

The ‘Feminization’ of fish

O

N

F

N

NH

O

O

H

CH3

(Cyranoski, D. (2001). Feminized fish encourageJapan to test pollution links. Nature 412, 668.)

15

Page 25: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

Institute for

Transport Systemsand Technologies -Sustainable SystemsInstitute for “Sustainable Transport”

Sustainable Transport has recently become an important concern for transport and land-use planners. It is a concept developed in reaction to the consequences of visibly gone wrong transport and land-use policy and development over the second half of the past century – Urban transport systems that relied on personal vehicle, have proved unsustainable, consuming excessive energy, affecting the health and environment, and delivering a declining level of service despite increasing investments.

Motorcycle and Asian developing countries

Recently, a pre-study has been established. 9 travel surveydatabases undertaken in 8 mid-sized cities of Thailand,between 2003 and 2008, were taken into the analysis.Several statistic evidences from this study do help us toroughly picture how the relationship between motorcycleand Asian people looks like. In this poster, 4 evidences arepresented:

• The first chart (the pine chart) shows the average proportion of household car and motorcycle ownershipamong those mid-sized cities. Almost 90% of urbanhouseholds own at least 1 motorcycle.

• The second chart (the colour column chart) shows the proportion of trips made by various transport modes.Over 50% of trips are typically made by motorcycle whileless than 10% are made by public transit.

• The other 2 charts (on the green hatch) present somefindings from an attitude study on motorcycle in a mid-sized city in Thailand. Majority of people have a neutralto highly positive to using and owning motorcycle.

These imply a strong motorcycle dependency, and also the difficulty in changing traveller behaviour and introducinga more sustainable transport mode.

No it is not!

Neutral

Yes it

is!

A study to define possible way to introduce more sustainable transport systems into mid-sized cities of Asian developing countries. Conceptually, for the first step the reasons behind traveller behaviour and decision making need to be investigated using several approaches e.g. statistics, choice modelling and activity-based analysis. The further step is to define the strengths, weaknesses, opportunities and threats (SWOT) involved in each reason contributing MDE, and seeking for a point that we could potentially force people with a new policy and/or development strategy to introduce more sustainable transport system while reducing use of previous unsustainable systems. Stated Preference approach would play important role in this stage. A brief diagram of the study methodology is shown on the left hand side. This study chooses Thailand as the principle study area. A further study could be an extension of the study area to other Asian developing countries.

Attitudes on Motorcycle

A Pre-Study in Thailand

A Study for Sustainable Transport in Asian Mid-Sized Cities

No I don’t!

Neutral

Yes I d

o!

For more information, please contact:Researcher: Jaruwit PrabnasakSupervisor: Prof Michael TaylorEmail: [email protected]

Why mid-sized cities? It is the fact that over 60% of urban population in Asian developing countries lives in mid-sized cities (population of between 50k and 500k).Most previous studies in motorcycle dominant environments were however established in such large cities with multimillions population. We know there are manydiscrepancies between mid-sized and large cities that could contribute to different people behaviour and lifestyle. That means the policies as well as developmenttechniques suggested for those large cities perhaps do not fit to the mid-sized cities.

Motorcycle seems to be a signature of Asian developing countries!We all know that there is a massive use of motorcycles in most urbanareas of those countries, called Motorcycle Dominant Environment (MDE).Recent studies have affirmed that the great contributions of MDE could below-income, rapid urban expansion and deficiency of public transitservices. Although, the unique characteristic of motorcycle could fill upthose gaps and provide a lot of benefits to the owners under the condition,it also causes many serious transport issues. In which to develop‘Sustainable Transport’ in those countries, the impacts of motorcycle must be seriously taken into account.

Start with existing databases

Stated Choice Model

Test and improve policy/strategy

New policy/strategy

Stated Preference

Survey

General stat Activity-basedChoice model

Mixed-analysis

9 travel survey databases

State of the art knowledge

Define ‘unsolved problems’

< Research methodology >

“Assume you already have a car, do you wish to have another motorcycle?”

“Is the motorcycle an necessary thing for your household?”

< Household Vehicle ownership >

< Travel mode choices >

Car

Motorcycle

Public Tran

sit

Oth

ers

9.7%

53.2%

28.2%

8.9%

41%

48%7%

5%

Motorcycle Only

Car and Motorcycle

None

Car Only

43%

3% 3%

28%23%

46%

20%23%

6%5%

16

Page 26: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

Figure 2. Survey returns by suburb around Adelaide

“Citizen Science is a research methodology

where professional researchers engage the

public to collect data within a cooperative

framework of research and education”

Cooper, CB, Dickinson, J, Phillips, T, & Bonney, R (2007) Citizen science as a tool for conservation in residential ecosystems, Ecology and Society, Vol. 12, No. 2.

Case Study

What is Citizen Science? Scientists work to understand the complexities of the natural world. This endeavour often requires a great deal of data collection, but time and resource availability limit the data collection that scientists can do. One solution to this problem is to have more people collecting data, and this is where Citizen Scientists can assist. Members of the community can help further our understanding of the natural world by collecting data and submitting their findings.

Citizen Science is more than just data collection. In order for a research project to work properly, Citizen Scientists need adequate information about what they are studying and how to study it. So scientists must produce information for the community, to inform them about the project and the subject of the study. Additionally, scientists must provide feedback to participants once the results of the study are finalised, in order to

maintain the engagement of the Citizen Scientists.

There are many benefits of Citizen Science. Community members get a chance to inform scientists, and, in the process, learn more about their environment. Further, information gained through Citizen Science projects can change public perceptions of the natural world, promote interaction with nature, and engage the community in the management of natural resources. Scientists benefit from data collection over

a large area, or over a long period of

time. Data can also be

collected from areas that are

normally difficult to access, such as private

property, or at times when fieldwork is

sometimes challenging, such as at night-time.

Operation Possum is a Citizen Science project that has collected information about possums and how people interact with them in South Australia. With the support of local and regional radio through ABC 891 Adelaide, researchers from the Barbara Hardy Centre have been able to collect data from around the state. The public response to Operation Possum was tremendous. Over 2,300 surveys were completed via an online survey instrument over a three month period in 2008. Figures 1 and 2 show survey returns from towns and suburbs in South Australia.

Philip Roetman Barbara Hardy Centre, UniSA Supervisors: Prof. Chris Daniels

& Dr. Delene Weber [email protected]

Figure 1. Survey returns by town around South Australia

“Thankyou for creating this survey, and attempting to raise some awareness amongst the community” (survey respondent) 17

Page 27: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

Macroscopic models represent travel movements with aggregate vehicle flows over a given time period, e.g. peak, off-peak or daily. Interactions between individual vehicles are largely ig-nored as traveller demands are estimated from socio-demographic and land-use data. Still, some output from macro level models can be useful as an input to micro level models ei-ther as a model calibration indicator or simply as a pure input to the modelling process. For example, travel demand origin-destination matrices produced by the macro level models are basic input to the microsimulation.

The microscopic modelling is based on a representation of de-tailed transport networks capturing individual vehicle move-ments, driver interactions as well as the operation of signalised intersections and multimodal interchanges. These models are capable of estimating traffic interaction dynamics and providing a more detailed expression of network operations in comparison to their macroscopic counterparts. Microsimulation software can simulate vehicle and engine responses to driver perceptions and reactions, the individual vehicles in road traffic and vehicle flows on a length of road or through an intersection. As the name sug-gests, microsimulation refers to the simulation of detailed road networks (individual vehicles). Microscopic models use a sto-chastic process for traffic modelling. This means that traffic con-ditions are simulated and variability is statistically built into the system. Therefore, for the same input data, a range of traffic conditions can result therefore better mimicking what occurs in the real world. Such variations are largely due to a mix of driver characteristics where, for example, some modelled drivers are more aggressive than others.

Traditional strategic-level macroscopic trans-port models based on static network equilib-rium are not able to incorporate many impor-tant aspects of dynamic traffic behaviour. When the need arises to gain more detailed assessment of transport networks and individ-ual vehicle interaction, microsimulation mod-elling is a more appropriate approach. Both macro and micro approaches have their own advantages and will continue to play impor-tant role in transportation modelling.Linking the strategic macro and micro level models enables a harmonious information ex-change. This ultimately improves the cost-effectiveness in the development, application and maintenance of both model types. Bridg-ing the two scales of modelling will greatly en-hance operational speed and the ability of both model types to forecast traffic conditions.

Macroscopic Models Microsimulation Models

Adelaide Strategic Model

3D representation of Adelaide CBD network

Model linking

Adelaide City microscopic model

Dashboard view

From Macro to Meso to Micro (from Barcelo, 2005)

Developing a traffic microsimulation model of Adelaide City area The traffic model was constructed using Paramics microsimulation software as it is considered to be one of the best of its type and has found widespread use with road agencies and consultants within Australia. The Application Programming Interface also allowed increased functionality for testing Intelligent Transport Systems (ITS) scenarios.

3-D simulation Microsimulation software commonly of-fers a three-dimensional interpretation of the results. This type of output is repre-sented as dynamic traffic movement in real time with the movie capturing capa-bility.

Linking Macro and Micro Traffic Models Branko Stazic - ISST - Transport Systems

18

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Travel Time Reliability for Selected Adelaide’s Corridors

What is Travel Time Reliability ? The data is the eight consecutive years travel time data for ten Adelaide’s corri-dors as shown in Fig-ure 3.

The travel time data were collected by us-ing GPS by The South Australian Department for Transport, Energy and Infrastructure (DTEI).

Travel time reliability is an important performance measure for not only the road users, the freight industry but also for the traffic planners.

The reliable travel time will : 1. Improve the traffic performance 2. Help the road user to select their preference departure time

by taking into account the unexpected delay during their trip 3. Help the road user to choose the reliable route 4. Help the freight industry to arrange their delivery time 5. Help the traffic planner to select proper policy in order to

improve traffic performance

Travel time reliability can be defined as the probability to finish a trip within specified time by taking into account the unex-pected delay.

According to Federal Highway Administration (2006) travel time reliability is the consistency or dependability in travel times, as measured from day-to-day and/or across different times of the day.

By acknowledging the travel time reliability and variability, the

How Important is it ?

How to measure it ?

Discussion and Findings

�� This study examines the ten selected corridors of the Ade-laide Road networks by using the eight consecutive years of travel time data.

�� From the data analysis, it is found that there were many differences in buffer time index results among the corridors and for some the differences are much larger than others.

�� In addition, the buffer time index might be not be enough to represent the travel time reliability due to the significant variability of the travel time

Conclusion

Susilawati, Institute for Sustainable Systems and Technologies, Transport Systems Michael Taylor, Institute for Sustainable Systems and Technologies Sekhar Somenahalli, School of Natural and Built Environments

By accounting the unexpected delay and to make sure that the travellers will not arrive late, travel time reliability measure the extra time which is needed to finish the trip

Travel time reliability measurement

The Planning Index

The Buffer Time Index

Source : Federal Highway Administration Report (2006)

Study Area

Buffer Time Index (BTI)

1. The Kensington Road corridor BTI in 2003 and 2004 are much higher than the others (reach almost 100%).

2. The Newton Road, and Semaphore Road give the similar pattern ( BTI are not exceed the 30 %).

3. The Port Road average BTI is about 20 % (the busiest)

Planning Index (PI)

1. the planning index for the Magill Road, South Rod and Port Road corridors are steadily increasing ,

2. For the Newton Road, Cross Road, and Sema-phore Road corridor, the planning indexes seem to be constant.

AcknowledgementThe authors would like to thank Department of Transport, Energy and Infrastructure of the Government of South Austra-lia for supplying the data used in this research.References : FHWA. (2006) Travel time reliability : making it there on time, all the time. Federal Highway Administration US DOT. Lomax, T., Schrank, D., Turner, S. & Institute, T.T. (2003) Selecting travel reliability meas-ures. Texas transportation institute Cambridge systematics Inc Recker, W., Chung, Y., Park, J., Wang, L., Chen, A., Ji, Z., Liu, H., Horrocks, M. & Oh, J.-S. (2005) Considering Taking Risk Behavior in Travel Time Reliability. Institute of Transportation Studies, University of California, Irvine

Biography

The author completed her Bachelor degree at Geomatics Engineering In Indonesia and had work experiences in GIS Applications. In 2006, She pursued her degree at the University of South Australia majoring in the Master of Transport Systems Engineering. Now she is working in her PhD research which study the travel time reliability of Adelaide road networks under the supervision of Prof Michael Taylor and Dr Sekhar Somenahalli.

19

Page 29: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

BackgroundCracking clay soils (Fig. 1) are present in South Australia’s arid rangelands. Shelters are limited in arid areas and cracking clays may provide refuge for arid-zone plants and animals (Fig. 2 and Fig. 3). These soils may be particu-larly important habitat for small mammals, including planigales (Planigalespp.) and threatened rodents (Read 1981; Brandle and Moseby 1999). Anec-dotally, it appears that where cracking clays are present, small mammals such as dunnarts (Sminthopsis spp.) exist in high numbers. Pastoralism (grazing) is the dominant commercial land use in the rangelands (Smyth & James 2004); it has been identified as a key threat to rangeland biodiversity (Pringle & Landsberg 2004).

Shelter properties of cracking clays: Shelter properties of cracking clays: implications for rangeland biodiversityimplications for rangeland biodiversity

Helen�Waudby,�School�of�Natural�and�Built�Environments,�University�of�South�Australia,�Mawson�Lakes�SA�5095,�Australia.�Email:�[email protected].��

MethodsCrack attributes such as depth, width, and length will be measured at grazed and less-grazed sites in order to define their physical structure. Data loggers will be used to determine the temperature buffering and humidity regulating role of cracks. They will be placed in selected cracks and programmed to record data over 24-hr periods, in different seasons. I will com-pare differences in shelter properties between cracks from grazed and less-grazed sites.

Expected outcomes Some of the anticipated outcomes of this research include increased understanding of:

�� the value of cracks as shelter for arid-zone biota; �� the impacts of pastoralism on what may be critical habitat; and, �� the role of cracking clays in biodiversity maintenance in the arid zone.

Fig. 3 Fat-tailed Dunnarts (Sminthopsis crassicaudata)may use cracks as shelter

I commenced a Ph.D. in Environmental Management after completing a Bachelor of Applied Science (Biodiversity, Environmental and Park Management) (Honours). I became interested in cracking clay soils while working as an Environmental Consultant in the South Australian rangelands.

Aims & research questions I aim to determine the shelter properties of cracking clays. My research questions are 1a) what is the role of cracks in temperature buffering and humidity regulation; 1b) how does this role affect crack shelter proper-ties; 1c) what is the effect of grazing on the shelter properties of cracking clays?

Fig. 1 Cracking clay soils in the arid zone

Fig. 2 Cracks may shelter seeds and seedlings

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Page 30: Usama Abu Risha Cl-36-C14 Dating Poster · The 36Cl and 14C ages of a given groundwater sample are often quite different. The 36Cl ages may be up to one order of magnitude higher

Abstract The sources of uncertainty/vagueness in travel demand model are not only from the lack of information related to the parameters that the model tries to estimate but also due to the presence of qualitative/linguistic variables which are often occurred in human thinking. Fuzzy Set Theory (FST) is suggested can tackle the computation of such variables. Combined with other approach, in this case Artificial Neural Network (ANN), a hybrid approach is promoted to forecast intra city working trip distribution with trip length addressed as a fuzzy variable. FST is used to calculate the qualitative/fuzzy variables, while ANN is used to estimate the distribution of journey to work.

Fuzzy-Neuro for Trip Distribution Estimation

Gusri Yaldi1, Professor M A P Taylor2, Dr. Wen Long Yue3 1 PhD Candidate, ISST-Transport Systems

2 Director, Institute for Sustainable Systems and Technologies 3 Senior Lecturer, Program Director, ISST-Transport Systems

References Chen, S. J. and C. L. Hwang (1992). Fuzzy Multiple Attribute Decision Making. Lectures Notes in Economics and Mathematical Sys-tems, Pringer-Verlag. Ortuzar, J. d. D. and L. G. Willumsen (1994). Modelling transport. West Sussex, England, John Wiley & Sons Ltd. Teodorovic, D. and K. Vukadinovic (1998). Traffic Control and Transport Planning: A Fuzzy Sets and Neural Networks Approach. Mas-sachusetts, USA, Kluwer Academic Publisher.

Background Question 1 : What is the distance of your journey to work?

A. About 10 km C. Above 10 km B. Less than 10 km D. A, B and C are correct

Question 22 : How will you count “about 10 km”, “less than 10 km”, or “above 10 km”? By using FST approach, for example, Chen & Hwang (1992) method

Methodology 1. Define the ANN structure and properties (see figures below): 2. Define fuzzy variable/neuron on the input layer Number of layers, Learning Rate (LR), number of neurons for each 3. Define the method to convert fuzzy to crisp score layers (Trip Production/P, Trip Attraction/A, Trip Length/D 4. Convert the fuzzy variable/neuron to crisp score and Estimated Trip/Tij), initial connection weights (w), activation 5. Train, Validate and Test the Network Function, training goal , training algorithm, maximum iteration/epoch 6. Evaluate model performance

Research results Further study The experiment is currently ongoing. Initial results are: 1. Categorizing the distance into short and long and define the impacts 1. Both models perform at the same level on the model performance 2. Some constraints have not yet been fulfilled by both models 2. Modifying the model structure so that it can meet the constraints 3. Compared to traditional model (gravity model), both models have 3. Testing model with different data set to define the consistency of higher performance (up to 16%) proposed approach

Office Address: Transport Systems Centre, City East Campus Phone. 83021776 Email: [email protected]

Experience. The Difference. Experience. The Difference. Experience. The Difference. Experience. The Difference.

Question 33 : What is Artificial Neural Network? In short, it is a method that tries to mimic “human brain” in predicting future events by processing information transmitted from the adjacent input neurons and re-transmitted to the output neuron(s) Question 4 : Can FST and ANN be used together? Yes, and they are expected can have higher performance

Hints : The distance is a fuzzy variable because the following facts : 1. Most travellers would not know the exact distance travelled from origins and destinations 2. Each traveller starts to travel from different points within an origin zone to different points in the destination zone

Input layer Hidden layer Output layer wj-i

wk-j Goal (diff) = Act—For

LR

Common Neural Network Model Structure Proposed Neuro-Fuzzy Model

wj-i wk-j

There are still 3 neurons in input layer, however, the distance variable is now a Fuzzy neuron so that the vagueness in the distance can be captured

21