Milton Keynes Water Cycle Study Outline Strategy
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Milton Keynes Water Cycle Study Outline Strategy Final December 2008 In partnership with: Milton Keynes Council Water Cycle Study – Outline Strategy Revision Schedule Milton Keynes Water Cycle Study – Outline Strategy December 2008 Rev Date Details Prepared by Reviewed by Approved by 01 23rd May 2008 Interim Draft Gemma Costin Carl Pelling David Dales Assistant Consultant Senior Consultant Director Andrew Woodliffe Senior Consultant 02 22nd July 2008 Final Draft Gemma Costin Dr Jon Hillman David Dales Assistant Consultant Senior Consultant Director Andrew Woodliffe Senior Consultant 03 26th September Final Draft v2 Gemma Costin Andrew Woodliffe David Dales 2008 Assistant Consultant Senior Consultant Director 04 19th December Final Gemma Costin Andrew Woodliffe David Dales 2008 Assistant Consultant Senior Consultant Director Scott Wilson Mansfield i-Centre Hamilton Way Mansfield Nottinghamshire 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. 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The contents of this document do not provide legal or tax advice or opinion. © Scott Wilson Ltd 2008 www.scottwilson.com Milton Keynes Council Water Cycle Study – Outline Strategy Table of Contents Table of Contents.......................................................................................... i Executive Summary .................................................................................... iv Acronyms...................................................................................................viii 1 Introduction ....................................................................................... 1 1.1 Growth in Milton Keynes................................................................................................. 1 1.2 Development and the Water Cycle .................................................................................2 1.3 Milton Keynes WCS and the Planning Process............................................................... 3 2 Milton Keynes Water Cycle Strategy ................................................. 6 2.1 Approach to the Water Cycle Strategy............................................................................6 2.2 WCS Stakeholders ......................................................................................................... 8 3 Milton Keynes Growth Context ........................................................ 13 3.1 New Housing Areas...................................................................................................... 13 3.2 New Employment Areas ............................................................................................... 18 4 WCS Methodology .......................................................................... 19 4.1 Step 1a / Step 1b: Baseline Conditions and Capacity ................................................... 19 4.2 Step 2: Water Services Infrastructure Development Options ........................................ 21 4.3 Data Limitations............................................................................................................ 22 5 Flood Risk Baseline......................................................................... 23 5.1 Flood Risk Identification Methodology........................................................................... 23 5.2 Available data and Assumptions................................................................................... 24 5.3 Baseline Description..................................................................................................... 24 5.4 Fluvial........................................................................................................................... 26 5.5 Sewers ......................................................................................................................... 30 5.6 Surface Water............................................................................................................... 32 5.7 Groundwater................................................................................................................. 35 5.8 Artificial Sources........................................................................................................... 36 5.9 Flood Risk Constraints Summary.................................................................................. 37 5.10 Data Limitations............................................................................................................ 39 6 Wastewater Baseline and Capacity ................................................. 41 6.1 Available Data and Assumptions .................................................................................. 42 6.2 Wastewater Treatment Baseline and Capacity ............................................................. 43 Final December 2008 i Milton Keynes Council Water Cycle Study – Outline Strategy 6.3 Wastewater Network Baseline and Capacity................................................................. 45 6.4 Wastewater Environment Baseline ............................................................................... 50 6.5 Water Quality Baseline and Capacity............................................................................ 51 6.6 Wastewater Summary .................................................................................................. 59 7 Water Resources and Supply Baseline ........................................... 61 7.1 Introduction................................................................................................................... 61 7.2 Available Data and Assumptions .................................................................................. 61 7.3 Regional Water Resources: Existing Situation.............................................................. 61 7.4 Milton Keynes - Water Resource Baseline Assessment................................................ 62 7.5 Water Supply – Existing Capacity ................................................................................. 65 7.6 Water Supply Network – Baseline................................................................................. 73 7.7 Bedford and Milton Keynes Waterway .......................................................................... 75 7.8 Water Resources and Water Supply Summary............................................................. 76 8 Water Cycle Option Development ................................................... 78 8.1 Introduction................................................................................................................... 78 8.2 Wastewater Option Development ................................................................................. 78 8.3 Water Resources Option Development......................................................................... 79 9 Generation of Flood Risk - SUDS Options....................................... 86 9.1 Introduction................................................................................................................... 86 9.2 Flood Risk from Development – Strategic Options........................................................ 86 9.3 SUDS Utilisation ........................................................................................................... 89 9.4 Flood Risk Management Summary............................................................................... 96 10 Ecological Assessment.................................................................... 97 10.1 Objectives and Approach.............................................................................................. 97 10.2 Sites within Milton Keynes Unitary Authority ............................................................... 101 10.3 Sites of Special Scientific Interest ............................................................................... 101 10.4 Local Nature Reserves ............................................................................................... 101 10.5 Downstream Sites - Special Areas of Conservation.................................................... 102 10.6 Downstream Sites - Special Protection Areas............................................................. 105 10.7 Ramsar Sites.............................................................................................................. 106 10.8 Sites of Special Scientific Interest ............................................................................... 108 10.9 Overall Screening Opinion.......................................................................................... 109 11 Water Quality / Water Framework Directive................................... 112 11.1 Water Framework Directive Standards ....................................................................... 113 11.2 WFD and Milton Keynes ............................................................................................