South Holland, South Kesteven and Rutland Outline Water Cycle Study Technical Report
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South Holland, South Kesteven and Rutland Outline Water Cycle Study Technical Report Final January 2011 Prepared for South Holland, South Kestevern and Rutland Outline Water Cycle Study Technical Report Revision Schedule Technical Report January 2011 Rev Date Details Prepared by Reviewed by Approved by 01 September V1 Clare Postlethwaite Carl Pelling Carl Pelling 2010 Senior Consultant Principal Consultant Principal Consultant Helen Judd Assistant Hydrologist November v2 Clare Postlethwaite Carl Pelling Carl Pelling 2010 Senior Consultant Principal Consultant Principal Consultant January 2011 Final Clare Postlethwaite Carl Pelling Carl Pelling Senior Consultant Principal Consultant Principal Consultant Scott Wilson Scott House Alençon Link This document has been prepared in accordance with the scope of Scott Wilson's Basingstoke appointment with its client and is subject to the terms of that appointment. It is addressed to and for the sole and confidential use and reliance of Scott Wilson's client. Sc ott Wilson Hampshire accepts no liability for any use of this document other than by its client and only for the purposes for which it was prepared and provided. No person other than the client may RG21 7PP copy (in whole or in part) use or rely on the contents of this document, without the prior written permission of the Company Secretary of Scott Wilson Ltd. Any advice, opinions, or recommendations within this document should be read and relied upon only in the Tel 01256 310200 context of the document as a whole. The contents of this document do not provide legal or tax advice or opinion. Fax 01256 310201 © Scott Wilson Ltd 2010 www.scottwilson.com South Holland, South Kestevern and Rutland Outline Water Cycle Study Technical Report Table of Contents Executive Summary................................................................................... 5 1 Acronyms and abbreviations ......................................................... 7 2 Introduction ..................................................................................... 9 2.1 Growth in South Holland, South Kesteven and Rutland .................................................. 9 2.2 Study History .................................................................................................................. 9 2.3 Water Cycle Study Reporting........................................................................................ 10 2.4 Study Contributors........................................................................................................ 11 2.5 Outline Study – Aims and Objectives............................................................................ 12 2.6 Study Area.................................................................................................................... 12 2.7 Key Constraints Assessment ........................................................................................ 14 3 Policy and Supporting Information.............................................. 17 3.1 Legislation and Policy ................................................................................................... 17 3.2 Guidance ...................................................................................................................... 23 3.3 Supporting Documents ................................................................................................. 23 3.4 Data Summary.............................................................................................................. 24 4 Proposed Growth .......................................................................... 25 4.1 Introduction................................................................................................................... 25 4.2 South Holland............................................................................................................... 25 4.3 South Kesteven ............................................................................................................ 28 4.4 Rutland......................................................................................................................... 29 5 Wastewater Strategy ..................................................................... 32 5.1 Introduction................................................................................................................... 32 5.2 Baseline........................................................................................................................ 32 5.3 Capacity Assessment Methodology Overview .............................................................. 36 5.4 Wastewater Treatment Capacity Assessment............................................................... 38 5.5 Environmental and Ecological Impact ........................................................................... 44 5.6 Wastewater Network Capacity Assessment.................................................................. 49 5.7 Conclusions.................................................................................................................. 62 6 Water Supply Strategy .................................................................. 65 6.1 Water Resources in the Study Area.............................................................................. 65 6.2 Water Demand Calculations ......................................................................................... 68 6.3 Water Efficiency............................................................................................................ 68 6.4 Water Supply Infrastructure .......................................................................................... 91 South Holland, South Kestevern and Rutland Outline Water Cycle Study Technical Report 6.5 Environmental and Ecological Impact ........................................................................... 92 6.6 Conclusions.................................................................................................................. 94 7 Flood Risk Management ............................................................... 95 7.1 Flood Risk to Development........................................................................................... 95 7.2 Flood Risk from Development – Surface Water Management..................................... 107 7.3 Flood Risk from Development - Increased WwTW Discharges ................................... 110 7.4 Climate Change.......................................................................................................... 111 7.5 Conclusion.................................................................................................................. 111 8 Growth Locations Assessment.................................................. 112 8.1 Introduction................................................................................................................. 112 8.2 South Holland District ................................................................................................. 114 8.3 South Kesteven District .............................................................................................. 122 8.4 Rutland County........................................................................................................... 131 9 Outline Policy Guidance ............................................................. 137 9.1 Introduction................................................................................................................. 137 9.2 Water Cycle Policy...................................................................................................... 137 10 Developer checklist..................................................................... 140 11 Recommendations for Detailed Study....................................... 144 12 Appendices.................................................................................. 145 12.1 Appendix A - Stakeholder Communications Strategy.................................................. 146 12.2 Appendix B – Data Request........................................................................................ 147 Executive Summary The administrative authorities of South Holland, South Kesteven and Rutland are expected to experience an increase in housing and employment provision over the period up to 2026. The recently revoked Regional Spatial Strategy (RSS) for the East Midlands 1 (the East Midlands Regional Plan or EMRP) states that the total housing provision from 2006 to 2026 for South Holland is 7,400, for South Kesteven is 13,600 and for Rutland is 3,000. The overall aim of the project is to identify a clear programme of required water services infrastructure and its implementation to support the delivery of sustainable growth up to 2026.The WCS tests the impact of the proposed development on the water cycle, defines the existing baseline capacity for growth without the need for new infrastructure and determine where new infrastructure or further investigation is required to overcome constraints that may limit the required growth levels in the study area as a result of new water services infrastructure. The objectives of the WCS are to ensure: • water services infrastructure is provided in a timely manner to support the housing, employment and related services to support the growth planned for the region to 2026; • there is a strategic programme for delivery of key infrastructure; • there is a strategic approach to the management and usage of water; • that development