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Meeting water supply needs - sustainably. East of England Biodiversity Forum & EEDA. Miranda Davis 27 th April 2006. Essex & Suffolk Supply Areas. How to Balance Supply and Demand. Forecast future demand population change, housing, industry, customer behaviours Assess Reliable Yields - PowerPoint PPT Presentation
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Meeting water supply needs - sustainably
Miranda Davis
27th April 2006
East of England Biodiversity Forum
&
EEDA
Essex & Suffolk Supply Areas
How to Balance Supply and Demand
Forecast future demand• population change, housing, industry,
customer behaviours
Assess Reliable Yields• Quality and quantity reviews, Environmental
studies, licence performance
Twin Track Approach• Constrain demand• Source new supplies
Challenges for Water Resource Planning in Essex
• One of the driest regions of the UK, prone to drought • Increased demand for water due to new
developments, increasing population and changing demographics
• No potential for traditional new resource development within Essex, as no intrinsic water available
• Major uncertainties posed by climate change, time limited licences, environmental drivers and sustainable abstraction
Abberton Reservoir 32% - November 1997
Demand Management
Water Efficiency• Specific initiatives for homes• Industry leaders on the promotion of
water efficiency initiatives
Leakage Management• Significant reduction over last 8 years;
reached the ‘Economic Level’ (ELL)
Metering• Meter penetration in Essex currently 32%
Water Efficiency History
• Feb 1996 New Duty to promote• 1997 Watersmart, leading to 10,000 audits pa• 1998-2000 Water Efficient New Homes Project• 1999 Water Forum • Schools projects, waterbutts, hospitals etc• Research project on maximum savings achievable in
new homes (technology + behaviour)• Continued programme of audits and projects• Water in Sustainable Communities conference April
2005
Leakage Management
60
65
70
75
80
85
90
95
100
92/9
3
93/9
4
94/9
5
95/9
6
96/9
7
97/9
8
98/9
9
99/0
0
00/0
1
01/0
2
02/0
3
03/0
4
04/0
5
05/0
6
06/0
7
07/0
8
08/0
9
09/1
0
LE
AK
AG
E (
Ml/d
)
Actualleakage
Leakagetargets
Economiclevel
Trends in Consumption
120
130
140
150
160
170
180
1994/95 1995/96 1996/97 1997/98 1998/99 1999/00 2000/01 2001/02 2002/03 2003/04 2004/05
Pe
r C
ap
ita
Co
ns
um
pti
on
(P
CC
) (l
/hd
/d)
pcc measured pcc unmeasured Linear (pcc measured) Linear (pcc unmeasured)
Unmeasured PCC
Measured PCC
Langford Recycling Scheme
Brookend STW
LangfordRecyclingScheme Langford
WTW
Sea
River Chelmer
Effluent Pipeline
Discharge
Pipe 3 km
OutfallStructure
RecyclingInlet Works
HanningfieldWTW
Hanningfield Reservoir
River Chelmer
WTW Abstraction
River Blackwater
Beeleigh WeirEffluent PipeOutfall
The ‘Abberton Scheme’
2000 onwards
Recognised in 2000 that the three schemes that had been investigated since 1992 were effectively inter-related elements of the same scheme :
1. Variation of the Denver/Blackdyke Licences
2. Upgrade of the Transfer Route (EOETS)
3. Raising of Abberton Reservoir and increased storage
Thank You