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Such models provide a good representation of the physical and hydraulic phenomena but, because of their complexity, they are usually non-user
friendly. In the con-text of a typical urban development scenario of multiple stake-holders drawn from a wide variety of back-grounds, there is clear potential for the use of a central data integra-tion and communica-tion GIS tool to act as a precursor to analyti-cal modelling.
SUDSLOC has been de-veloped in this sense by Middlesex University research centres : UPRC and FHRC.
The contribution that stormwater BMPs (also known as Sustainable Urban Drainage Systems ; SUDS) can make to sus-tainable urban develop-ment through their potential to address the needs and con-cerns of a diverse group of stakeholders, has been widely rec-ognised. These sys-tems include a wide range of structures having different im-pacts in terms of wa-ter quantity and qual-ity, posing different technical constraints and entailing variable costs. However, unfamiliarity with these techniques, and in many cases, the lack of
technical knowledge held by stakeholders, could influence the decision-making process when selecting and locating a p p r o p r i a t e s y s -
tems. Urban stormwater models are now widely used to assess the impact of control devices on the urban drainage system.
Introduction
SUDSLOC
Is a Geographic Information Decision System Support tool Provides support for the identification and location of appropriate SUDS Supports the integration of data (quantitative and qualitative) from a variety
of sources to enable the investigation of the potential benefits of BMPs Incorporates user-friendly tools to ensure simplicity and ease of communica-
tion Requires relatively few skills in GIS (once the spatial data are ready to use) Is designed to communicate with a range of storm modelling approaches
Main Contact: Christophe Viavattene [email protected]
SUDSLOC
A constructed Wetland
A GIS-based SUDS selection and location tool for the evaluation of hydrologic performance and storm flow reduction
Special points of interest: GIS DSS support tool for
SUDS implementation at urban scale
Support for various information and data (Multi Criteria Com-parator, Pollutant removal efficiency, Detailed documents on SUDS
Interactive map func-tionalities
Link with 1D 2D storm water model
Link with urban land use unit area loading distribution
SUDSLOC provides vari-ous information and data on SUDS to support planning and design decision Site Criteria The suitability of a site for a particular BMP depends on various criteria (land use, soil type, slope, depth to groundwater, drainage area, roof types). These criteria have been applied within SUDSLOC and can be modified to support the identification of potential locations at cadastral and lower scale unit (road, park, building, pavement).
SUDS pollutant removal potential (Ranking) SUDS may support the re-moval of various pollutant (TSS, BOD, COD, Nitrates, Phosphates, Cd, Cu,...). Indeed each SUDS pos-sesses different removal processes (adsorption, set-tling, microbial degrada-tion, filtration, plant uptake, volatilisation and photoly-sis). SUDSLOC provides an option to rank the poten-tial removal of each SUDS. The value can be changed if required by the end user.
Site-by-site assessment tool Identifying all potential SUDS for a particular loca-tion and provide additional information (MCC, Pollut-ant removal) for decision support Add a BMP tool Add a particular SUDS to shapefiles. A cursor indica-tion simplifies the identifi-cation of suitable sites. This option creates outputs file for storm water models
SUDSLOC provides three options to assess the poten-tial location for SUDS within an urban develop-ment. Potential Areas tool Identifying all potential areas for a particular SUDS. This option is particularly useful to offer an overview at urban scale of the poten-tial use of SUDS and a first reflection of integrated wa-ter management.
Unit Area Loading Identifying pollutant load distribution within the ur-ban catchment based on land use activities
Supporting the stakeholders in their decision
Interactive maps functionalities
quality, ecological impact O&M: Maintenance and servicing requirement, system reliability and du-rability Social and urban com-munity benefits: Public health and risk, sustainable development, public/community information and awareness, amenity and aesthetics Economic : Life cycle cost, long term afforda-bility
Legal and Urban plan-ning: adoption status, build-ing development issues and storm water regulation.
A Catalogue of information
SUDSLOC provides de-tailed information on a full range of SUDS including design, O&M, performance and cases studies as .pdf document.
Multi-Criteria Comparator (Ranking) Stakeholders are able to assess the performance of SUDS against the follow-ing criteria (and indicators) based on a Multi-Criteria Comparator (MCC) analy-sis.
Technical: Flood con-trol, pollution control, adaptability to urban growth Environmental: Impact on receiving water volume, impact on receiving water
Page 2 SUDSLOC
Multi Criteria Comparator Interface in SUDSLOC
“To provide
pertinent
information
to a large
audience of
stakeholders
on the
management
of urban
surface water
drainage”
SUDSLOC is designed to provide an end user-friendly interface facilitating the choice of potential sites for SUDS implementation. SUDSLOC is not a storm water model or a quality model. However it is re-quired to compare and as-sess the flood and quality risk before and after the selection of SUDS to define potential control strategies. Thus SUDSLOC is cur-rently coupled with two models, a 1D storm water model (STORM) and a 2D GIS Flood model
(FLOODAREA). A specific interface has been devel-oped within SUDSLOC to exchange information with the STORM model.
Assessing the impact of the selected SUDS
quantity and quality. In particular, the area is sub-ject to rising water tables resulting from a decline in the area’s industry and the greater part of the run-off from Birmingham city cen-tre flows towards the River Rea. Severn Trent Water Ltd is facing increasing sewer network surcharging problems within its region, much of which is related to pluvial surface water flood-ing. As a contribution to addressing these issues, the
use of SUDS within East-side’s ongoing and future regeneration stage is being actively considered, and base data has been col-lected to enable a prelimi-nary application and testing of the GIS-based SUDS tool on a 12 ha plot.
Example of application : Eastside Birmingham
The SUDS modelling tool(SUDSLOC, STORM, FLOODAREA) has been applied to the 170 ha East-side urban development of the city of Birmingham; the second largest city in the UK. This inner urban de-velopment area lies imme-diately to the south of the city centre and has been undergoing major regenera-tion over the last five years. From a water perspective, the city has to deal with major issues on both water
Page 3 A GIS-based SUDS selection and location tool for the evaluation of hydrologic performance and storm flow reduction
“To highlight
the potential
of SUDS in
sustainable
urban
development”
STORM model
FLOOD AREA
2D visualisation
2007 Summer Flood : exceedance of a manhole (STORM model)
2007 Summer Flood : exceedance of a manhole (FLOODAREA)
Potential reduction of the exceedance after implementing SUDS (Green area)
SUDSLOC
Informed decision, Site selection, com-munication with models
Christophe Viavattene Flood Hazard Research Centre Middlesex University Trent Park Bramley Road London N14 4YZ +44 (0)20 8411 5530 [email protected]
This research and the development of SUDS_loc has been funded by two European Projects: EU SWITCH project http://www.switchurbanwater.eu/ EU Daywater project http://daywater.in2p3.fr/EN/
For more information on SUDSLOC
Middlesex University
FHRC UPRC
Lian Lundy Urban Pollution Research Centre Middlesex University The Burroughs London NW4 4BT +44 (0)20 8411 6361 [email protected]
