Huntingdonshire Outline Water Cycle Strategy Prepared for Huntingdonshire District Council April 2009 Prepared by: ................................................ Approved by: ................................................. Joseph Tomasi David Pope Engineer Regional Director Huntingdonshire Outline Water Cycle Strategy Huntingdonshire District Council Rev No Comments Date 1 Final Review 30.11.09 Enterprise House, 160 Croydon Road, Beckenham, Kent, BR3 4DE Telephone: 0870 905 0906 Fax: 020 8663 6723 Website: http://www.fabermaunsell.com Job No 60044449 Date Created April 2009 This document has been prepared by Faber Maunsell Limited (‘Faber Maunsell’) for the sole use of our client (the ‘Client’) and in accordance with generally accepted consultancy principles, the budget for fees and the terms of reference agreed between Faber Maunsell and the Client. Any information provided by third parties and referred to herein has not been checked or verified by Faber Maunsell, unless otherwise expressly stated in the document. No third party may rely upon this document without the prior and express written agreement of Faber Maunsell. f:\projects\60044449 huntingdon planning services\wcs\reports\water cycle strategy_final issue 07.05.10.doc Table of Contents 1 Executive Summary ........................................................................................................ 2 1.1 Purpose ................................................................................................................. 2 1.2 Scope .................................................................................................................... 2 1.3 Stakeholders ......................................................................................................... 2 1.4 Flood risk .............................................................................................................. 3 1.5 Water resource ..................................................................................................... 3 1.6 Environmental issues and opportunities for improvement .................................... 4 1.7 Water supply ......................................................................................................... 5 1.8 Waste water networks and treatment ................................................................... 5 2 Introduction ..................................................................................................................... 8 2.1 Background ........................................................................................................... 8 2.2 The Water Cycle ................................................................................................... 9 3 Relevant Policy and Guidance ..................................................................................... 14 3.1 Government Policy .............................................................................................. 14 3.2 National Level ..................................................................................................... 14 3.3 Regional Level .................................................................................................... 14 3.4 Local Level .......................................................................................................... 16 4 Development and Planning .......................................................................................... 19 4.1 Regional Planning ............................................................................................... 19 4.2 Local Development Framework .......................................................................... 19 4.3 Core Strategy ...................................................................................................... 19 4.4 Local Investment Framework .............................................................................. 19 4.5 Housing Growth .................................................................................................. 19 4.6 Huntingdon .......................................................................................................... 21 4.7 St Neots .............................................................................................................. 23 4.8 St Ives ................................................................................................................. 26 4.9 Ramsey ............................................................................................................... 28 4.10 Yaxley and Sawtry .............................................................................................. 30 4.11 Employment Growth ........................................................................................... 32 4.12 Global Recession ................................................................................................ 32 5 Flood Risk Management ............................................................................................... 34 5.1 Introduction ......................................................................................................... 34 5.2 Catchment Description ....................................................................................... 35 5.3 Strategic Flood Risk Assessment ....................................................................... 40 5.4 Existing Flood Risk ............................................................................................. 41 6 Water Resources and Supply ...................................................................................... 53 6.2 Management and Planning ................................................................................. 54 6.3 The Upper Ouse and Bedford Ouse CAMS ....................................................... 54 6.4 The Old Bedford including Middle Level CAMS ................................................. 57 6.5 The Nene CAMS ................................................................................................. 58 6.6 Water Efficiency .................................................................................................. 59 6.7 Water Companies ............................................................................................... 60 6.8 Anglian Water Area ............................................................................................. 61 6.9 Cambridge Water Area ....................................................................................... 63 6.10 CWC Water Resources Strategy ........................................................................ 65 6.11 HDC and Water Supply ...................................................................................... 66 7 Waste Water ................................................................................................................... 68 7.1 Introduction ......................................................................................................... 68 7.2 Waste Water Treatment ...................................................................................... 68 7.3 Increase in Dry Weather Flow (DWF) ................................................................. 70 7.4 Future WwTW Performance ............................................................................... 71 7.5 Implications of Predicted Future WwTW performance ....................................... 72 7.6 Environmental Issues ......................................................................................... 74 7.7 Waste Water Networks ....................................................................................... 75 7.8 Huntingdon Waste Water Network ..................................................................... 75 7.9 St Neots Waste Water Network .......................................................................... 78 7.10 St Ives Waste Water Network ............................................................................. 80 7.11 Ramsey Waste Water Network ........................................................................... 82 7.12 Sawtry Waste Water Network ............................................................................. 83 7.13 Yaxley Waste Water Network ............................................................................. 83 7.14 Brampton Waste Water Network ........................................................................ 83 8 Sustainable Drainage .................................................................................................... 85 8.2 Use of Sustainable Drainage Systems (SUDS) .................................................. 85 8.3 Flood Risk Mitigation ........................................................................................... 86 8.4 Groundwater Recharge ...................................................................................... 86 8.5 Geology ............................................................................................................... 86 8.6 Pollution Control .................................................................................................. 87 8.7 Amenity and Green Spaces ................................................................................ 88 8.8 Integrated Urban Drainage ................................................................................. 89 8.9 Internal Drainage Boards in Huntingdonshire ..................................................... 90 9 Environmental Improvement.......................................................................................