East Cambridgeshire District Council Water Cycle Study Detailed ...

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Revision Schedule Stage 2: Detailed Water Cycle Study Sept 2011 This document has been prepared in accordance with the scope of Scott Wilson's 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. Scott Wilson 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 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 context of the document as a whole. The contents of this document do not provide legal or tax advice or opinion. © Scott Wilson Ltd 2011 URS/Scott Wilson Scott House Alençon Link Basingstoke RG21 7PP Tel 01256 310200 Fax 01256 310201 Cambridgeshire Horizons East Cambridgeshire – Detailed WCS Rev Date Details Prepared by Reviewed by Approved by 01 February 2011 Draft Structure for comment Clare Postlethwaite Senior Consultant 02 May 2011 Draft_V2 Clare Postlethwaite Senior Consultant Amy Ruocco Graduate Water Specialist 03 July 2011 Draft_V3 Clare Postlethwaite Senior Consultant Amy Ruocco Graduate Water Specialist 04 Aug 2011 Final Draft (v4) Clare Postlethwaite Senior Consultant Amy Ruocco Graduate Water Specialist 05 Sept 2011 Final report Clare Postlethwaite Senior Consultant Amy Ruocco Graduate Water Specialist Dr James Riley Principal Biodiversity Specialist Carl Pelling Principal Consultant Carl Pelling Principal Consultant Carl Pelling Principal Consultant Carl Pelling Principal Consultant Carl Pelling Principal Consultant www.urs-scottwilson.com Carl Pelling Principal Consultant Jon Robinson Technical Director Carl Pelling Principal Consultant Jon Robinson Technical Director The front cover photographs are as follows top left: Soham Lode © Copyright Bob Jones and licensed for reuse under the Creative Commons Attribution-Share Alike 2.0 Generic Licence; top right sewage treatment works (taken by URS Scott Wilson); bottom left Hod Fen © Copyright Michael Trolove and licensed for reuse under the Creative Commons Attribution-Share Alike 2.0 Generic Licence; bottom right Wicken Fen © Copyright Rob Noble and licensed for reuse under the Creative Commons Attribution-Share Alike 2.0 Generic Licence.
Table of Contents Cambridgeshire Horizons East Cambridgeshire – Detailed WCS Executive Summary................................................................................... 1 The Wastewater Strategy ............................................................................................................. 1 The Water Supply Strategy .......................................................................................................... 3 Surface Water Drainage Management ......................................................................................... 5 Ecological Opportunities............................................................................................................... 5 Water Cycle Strategy Recommendations and Policy.................................................................... 5 Glossary of Acronyms and Abbreviations ............................................... 9 1 Introduction ................................................................................... 12 1.1 Study Need and Drivers................................................................................................ 12 1.2 WCS Reporting............................................................................................................. 12 1.3 Stage 2 - Study Governance......................................................................................... 13 1.4 Stage 1 Outline WCS – Key Findings ........................................................................... 13 1.5 Study Visions and Drivers............................................................................................. 16 1.6 Water Use – Key Assumption ....................................................................................... 18 2 Proposed Growth .......................................................................... 19 2.1 Preferred Growth Strategy............................................................................................ 19 2.2 Housing ........................................................................................................................ 19 2.3 Employment.................................................................................................................. 21 3 Detailed Wastewater Strategy ...................................................... 24 3.1 Stage 1 Conclusions..................................................................................................... 24 3.2 Wastewater Treatment Options Assessment ................................................................ 24 3.3 Ecological Appraisal ..................................................................................................... 44 3.4 Wastewater Networks................................................................................................... 54 4 Water Supply Strategy .................................................................. 63 4.1 Introduction................................................................................................................... 63 4.2 The Vision .................................................................................................................... 63 4.3 Ecological Appraisal ..................................................................................................... 66 4.4 Water Neutrality Pathway ............................................................................................. 67 4.5 Water Supply and Climate Change Adaptation............................................................. 98 5 Surface Water Management ....................................................... 100 5.1 The Vision .................................................................................................................. 100 5.2 Justification................................................................................................................. 100 5.3 Options for Surface Water Management..................................................................... 101 5.4 Development site requirements .................................................................................. 105
Page 1: East Cambridgeshire District Counci
Page 5 and 6: Executive Summary Stage 2 Water Cyc
Page 7 and 8: Stage 2 Water Cycle Study: Final Re
Page 9 and 10: Surface Water Drainage Management S
Page 11 and 12: SWM5 - Linkages to SWMP and SFRA St
Page 13 and 14: Glossary of Acronyms and Abbreviati
Page 15 and 16: Abbreviation Description RTPI Royal
Page 17 and 18: 1.3 Stage 2 - Study Governance Stag
Page 21 and 22: • Surface Water Management Plan f
Page 23 and 24: 2 Proposed Growth 2.1 Preferred Gro
Page 25 and 26: 2.3 Employment Stage 2 Water Cycle
Page 27 and 28: Figure 2-1: Potential development s
Page 29 and 30: Relevant WwTW Stage 2 Water Cycle S
Page 33 and 34: WwTW Soham Burwell Bottisham Hadden
Page 36 and 37: 3.2.2 Results Discussion WwTW Soham
Page 38 and 39: WwTW Consent parameter Stage 2 Wate
Page 46 and 47: Table 3-7: Potential Impact of Clim
Page 48 and 49: 3.3 Ecological Appraisal Stage 2 Wa
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Stage 2 Water Cycle Study: Final Re
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3.4.1 Stage 2 network assessment re
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Site Description of potential waste
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Site Description of potential waste
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Bottisham Site Assessment Site Desc
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Impact on Supplies Stage 2 Water Cy
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Low flow taps and showers Stage 2 W
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Figure 4-1: A typical domestic rain
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Medium Scenario The key assumptions
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Table 4-7: Details of new Build Spe
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WN Scenario New development Water u
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Operation of GWR £30 per annum 82
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Table 4-12: Estimated Cost of Neutr
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Figure 4-3: CO2 emissions from a
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4.4.7 Preferred strategy - delivery
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5 Surface Water Management 5.1 The
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• continuous surfaces with an inh
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5.5.1 Ecological opportunities Ely
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Site Stage 2 Water Cycle Study: Fin
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5.5.7 SuDS and groundwater protecti
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Lisle Lane, Ely 2.855 2.28 1,038 -
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Land rear of Fordham Road, Soham 2.
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6.3.3 Wastewater Network constraint
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6.4.4 Phasing Assessment Phase Dwel
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7.2 Climate Change and the Water Cy
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Directive/Legislation/Guidance Desc
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Key Additional development can be a
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Consents to achieve ‘Good Status
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MASS BALANCE CALCULATION: MONTE CAR
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LITTLEPORT STW Current Quality Cons
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HADDENHAM STW Current Quality Conse
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Sequencing Batch Reactor Stage 2 Wa
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Tertiary treatment Stage 2 Water Cy
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East Cambridgeshire WCS Flood Estim
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11 12 12 Is the discharged water on
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37 38 40 41 42 A) Have you provided
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