Water Cycle Study - East Devon District Council

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10.8 Outline water cycle strategy Ref EWCS April 2010 Exeter and East Devon Water Cycle Study 10.8.1 The following actions are required to ensure that the proposed growth in Exeter and East Devon can be met without adversely impacting on the water environment and that required water infrastructure can be planned for and brought online alongside new development, in a timely and phased manner: • Planning authorities shall maintain awareness of the regulated funding cycles under which Water Companies operate and ensure that South West Water is updated on the status of development proposals on a regular basis and in particular during the preparation stage of each AMP period. • Planning authorities shall consult South West Water as soon as precise locations, numbers and timescales for development are known and if required, SWW can then be appointed to undertake a detailed assessment of the water services infrastructure requirements. • Exeter and East Devon New Growth Point shall investigate and co-ordinate opportunities to use funding such as the Community Infrastructure Fund as a mechanism to fund detailed analysis of water services infrastructure where there is a need to identify sustainable technical solutions at an early stage (I.e. in advance of developer-led investigations). • Exeter City, the Environment Agency and South West Water shall work in partnership to develop a monitoring and development intervention programme to manage the risk of deterioration in the Exe Estuary. • Planning authorities shall promote sustainable surface water management and flood risk reduction by: o Adopting a policy of ‘No surface water connection to foul sewer’. o Supporting the South West Water ‘Sewers for Sewage’ initiative to reduce foul sewer flooding due to surcharging by surface water and blockage by grease, oils and waste. o Preparing a SuDS policy and adoption guide to assist planners and developers. This should become a Supplementary Planning Document (SPD) and be closely linked to the Green Infrastructure Study recommendations and the emerging Green Infrastructure strategy. o Working collaboratively with key stakeholders and the County Council to reflect their proposed new responsibilities for local flood risk management when generating policy documents for surface water management to ensure that the links necessary for partnership working are established. o Estimating the land-take required for SuDS solutions prior to applying the development densities to determine land allocations within the Local Development Framework. This will ensure sufficient land is set-aside to implement successful SuDS solutions that will also perform as multi-functional green infrastructure. o Preparing Surface Water Management Plans for areas of widespread (adjoining) development to ensure a coherent approach is taken to surface water management and ensure delivery of strategic SuDS as opposed to multiple developments generating their own isolated approach to SuDS. o Ensuring through the planning consent process that SuDS solutions are technically feasible and are protected against incapacity due to future infill development. It is important to ensure that future infill development does not negatively impact on existing surface water 10
Exeter and East Devon Water Cycle Study management systems – e.g. extension of a property that would prevent the existing soakaway from functioning, potentially leading to flooding. o Seek an amendment of Section 106 of the Water Act to exclude roof water from the definition of ‘domestic sewage’. Such an amendment would remove the right to connect roof water to existing public sewers and would support South West Water to reduce foul sewer flooding (due to surface water surcharge) and improve wastewater treatment capacity and efficiency (preventing increases in wastewater volume due to surface water). • When published, the Planning Authorities shall compare the adopted RSS development targets against the development scenarios used in this study and assess the implications of any differences between the two. • South West Water shall consult with the Environment Agency to assess the need for measures to mitigate existing flood risk at critical water supply and wastewater treatment assets, to mitigate future flood risk in receiving waters due to increased discharges from WwTWs and to mitigate pollution risk from flooding of WwTWs. 10.8.2 In addition, the following actions are recommended to enhance the sustainability of future development in Exeter and East Devon: • Development of the proposed water cycle sustainability objectives and where appropriate, application to the Sustainability Appraisal of the Core Strategy. • When published by the Environment Agency, review the updated Catchment Abstraction Management Strategies (CAMS) for the Exe catchment and for the Otter, Sid, Axe and Lim catchment and incorporate the findings into the Sustainability Appraisal. • Investment in the most sustainable water services infrastructure solutions available. • Redefinition of ‘domestic sewage’ within Section 106 of the Water Act to exclude roof water and prevent the right to connect roof water to foul sewer. • Reduce water consumption of the existing population through implementation of water efficiency measures such as retrofitting, education and encouraging development of water efficient devices. • Maximise implementation of water metering at existing properties to support South West Water’s target of 80% coverage by 2015 and the Environment Agency’s aspiration of 95% of existing properties by 2016. • Implementation through planning conditions of the Code for Sustainable Homes (CSH) to a level of 3 and above for water efficiency, targeted at the larger developments where the benefits from strategic water conservation systems would be greatest. 10 Ref EWCS April 2010
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Water Cycle Study - East Devon District Council

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