East Cambridgeshire District Council Water Cycle Study Detailed ...
East Cambridgeshire District Council Water Cycle Study Detailed ...
East Cambridgeshire District Council Water Cycle Study Detailed ...
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Stage 2 <strong>Water</strong> <strong>Cycle</strong> <strong>Study</strong>: Final Report<br />
Sept 2011<br />
43<br />
<strong>Cambridgeshire</strong> Horizons<br />
<strong>East</strong> <strong>Cambridgeshire</strong> – <strong>Detailed</strong> WCS<br />
Table 3-8: <strong>Water</strong> Quality and Wastewater Potential Climate Change Adaptation and Mitigation<br />
Measures 31<br />
Potential<br />
Climate<br />
Change<br />
Temperature rise<br />
Winter rainfall increase<br />
Summer rainfall decrease<br />
Sea level rise<br />
Increase in weather<br />
extremes (heatwaves,<br />
intense rainfall, storms)<br />
Potential Impact Adaptation and Mitigation Measures<br />
• Decrease in Dissolved<br />
Oxygen in rivers –<br />
impact on river ecology<br />
and wildlife<br />
• Faster wastewater asset<br />
deterioration<br />
• Changes in wastewater<br />
process efficiency<br />
• Increased diffuse<br />
pollution<br />
• Insufficient infrastructure<br />
capacity – storm tanks,<br />
CSOs etc.<br />
• Increased risk to rivers<br />
from combined sewer<br />
outflows<br />
• Degraded wetlands<br />
• More frequent low river<br />
flows<br />
• Less dilution in rivers for<br />
wastewater discharge<br />
• Reduced risk to rivers<br />
from combined sewer<br />
outflows<br />
• Tightening of discharge<br />
consent<br />
• Reduced flexibility –<br />
effluent required to<br />
maintain river flows<br />
• Saline Intrusion<br />
• Asset loss<br />
• Increased flooding and<br />
risk of service loss<br />
• Increased clean-up costs<br />
• Inability of infrastructure<br />
to cope<br />
• Increased subsidence –<br />
pipe failure<br />
• Ensure climate change mitigation<br />
strategies are in place for species and<br />
habitats at risk, e.g. BAPS<br />
• Monitor long-term Dissolved Oxygen<br />
levels in rivers and impacts<br />
• Improve resilience of wastewater assets<br />
to temperature rise, where new assets<br />
are required or upgraded<br />
• Where possible, control diffuse pollution<br />
runoff through SuDS<br />
• Promoting the creation and preservation<br />
of space (e.g. verges, agricultural land,<br />
and green urban areas, including roofs)<br />
in support of water quality, biodiversity<br />
and flood risk goals<br />
• Long-term monitoring of CSO spill<br />
volume and frequency. Ensure Urban<br />
Pollution Management (UPM) study is<br />
undertaken for major development<br />
upstream of CSOs<br />
• Ensure climate change mitigation<br />
strategies are in place for species and<br />
habitats at risk, e.g. Biodiversity Action<br />
plans<br />
• Consideration of future climate change<br />
impacts on wastewater discharges when<br />
renewing consents<br />
• Monitor water quality for potential<br />
impacts from saline intrusion<br />
• Ensure that key assets are located<br />
inland and are not susceptible to being<br />
lost through sea level rise<br />
• Promoting the creation and preservation<br />
of space (e.g. verges, agricultural land,<br />
and green urban areas, including roofs)<br />
in support of water quality, biodiversity<br />
and flood risk goals<br />
• Improve resilience of key wastewater<br />
assets such as CSOs, WwTW and<br />
outfalls, including new industry design<br />
standards for wastewater assets<br />
Lead Organisation (s)<br />
ECDC EA AWS NE<br />
31 Some inputs edited from AWS Strategic Direction Statement 2010 – 2035 http://www.anglianwater.co.uk/about-us/statutory-<br />
Timescale<br />
for Action<br />
Medium<br />
Medium<br />
Medium<br />
Immediate<br />
Immediate<br />
Medium<br />
Medium<br />
Medium<br />
Medium<br />
Long<br />
Immediate<br />
Medium
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