Water cycle evidence for the Vale of Aylesbury Plan Final document Document: 001 Version: 4 Aylesbury Vale District Council September 2012 Water cycle evidence for the Vale of Aylesbury Plan Final document Document: 001 Version: 4 Aylesbury Vale District Council September 2012 Halcrow Group Limited Burderop Park, Swindon, Wiltshire SN4 0QD tel 01793 812479 fax 01793 812089 halcrow.com Halcrow Group Limited has prepared this report in accordance with the instructions of client Aylesbury Vale District Council for the client’s sole and specific use. Any other persons who use any information contained herein do so at their own risk. © Halcrow Group Limited 2012 Halcrow Group Limited Burderop Park, Swindon, Wiltshire SN4 0QD tel 01793 812479 fax 01793 812089 halcrow.com Halcrow Group Limited has prepared this report in accordance with the instructions of client Aylesbury Vale District Council for the client’s sole and specific use. Any other persons who use any information contained herein do so at their own risk. © Halcrow Group Limited 2012 Water cycle evidence for the Vale of Aylesbury Plan Introduction Document history Water cycle evidence base for the Vale of Aylesbury Plan Aylesbury Vale District Council This document has been issued and amended as follows: Version Date Description Created by Verified by Approved by 1 17/01/2012 Draft document template for Andy McConkey approval 2 21/03/2012 Draft final report for steering Andrew Kamunda Andy Andy group consultation only McConkey McConkey 3 25/07/2012 Final version for signoff Lizzie Shipman Andy McConkey 4 10/09/2012 Final version for publication Lizzie Shipman Andy McConkey Water cycle evidence for the Vale of Aylesbury Plan Introduction Contents 1 Introduction 14 1.1 Project background 14 2 Planning and Development 15 2.1 Context and Vale of Aylesbury Plan 15 3 Flood Risk and Surface Water Management 23 4 Water services infrastructure and water companies 31 4.1 Legislation 31 4.2 Regulation 34 4.3 Developer Contributions 34 5 Water quality and wastewater treatment 36 5.1 Wastewater and Water quality 36 5.2 Water quality and wastewater treatment methodology – larger settlements 36 5.3 Water quality and wastewater treatment methodology – smaller settlements 37 5.4 Wastewater treatment capacity 37 6 Drainage network infrastructure 39 6.1 Assessment methodology 39 7 Water resources and water supply 40 7.1 Water supply infrastructure assessment methodology 40 8 Sustainable settlement analysis 41 8.1 Larger settlements in the Northern Vale market area 41 8.1.1 Buckingham market sub area 42 8.1.2 Winslow 46 8.2 Smaller settlements in the Northern Vale market area 49 8.2.1 Beachampton 49 8.2.2 Akeley 51 8.2.3 Gawcott 54 8.2.4 Thornborough 57 8.2.5 Tingewick 60 8.2.6 Chackmore 63 8.2.7 Radclive 66 8.2.8 Newton Longeville 68 Water cycle evidence for the Vale of Aylesbury Plan Introduction 8.2.9 Drayton Parslow 70 8.2.10 Great Horwood 73 8.2.11 Little Horwood 77 8.2.12 Hillesden 80 8.2.13 Thornton 83 8.2.14 Middle Claydon 85 8.2.15 Chetwode 89 8.2.16 Padbury 91 8.2.17 Calvert Green 94 8.2.18 Steeple Claydon 97 8.2.19 Stowe 100 8.2.20 Mursley 102 8.2.21 Swanbourne 105 8.2.22 Nash 108 8.2.23 East Claydon 111 8.2.24 Granborough 114 8.2.25 Stewkley 117 8.2.26 Marsh Gibbon 120 8.3 Larger settlements in the Southern Vale market area 124 8.3.1 Aylesbury 125 8.3.2 Haddenham 129 8.3.3 Wendover 132 8.4 Smaller settlements in the Southern Vale market area 136 8.4.1 Aston Abbots 136 8.4.2 Slapton 139 8.4.3 Ivinghoe 143 8.4.4 Pitstone 146 8.4.5 North Marston 148 8.4.6 Oving 151 8.4.7 Whitchurch 154 8.4.8 Edlesborough 157 8.4.9 Cublington 161 8.4.10 Wing 164 8.4.11 Wingrave 167 8.4.12 Rowsham 169 8.4.13 Creslow 171 8.4.14 Aston Clinton 173 8.4.15 Buckland 176 8.4.16 Drayton Beauchamp 179 8.4.17 Halton 182 8.4.18 Hardwick 185 8.4.19 Hulcott 189 8.4.20 Ashendon 193 Water cycle evidence for the Vale of Aylesbury Plan Introduction 8.4.21 Cheddington 196 8.4.22 Chilton 200 8.4.23 Chearsley 203 8.4.24 Cuddington 206 8.4.25 Grendon Underwood 209 8.4.26 Kingswood 212 8.4.27 Long Crendon 215 8.4.28 Ludgershall 217 8.4.29 Marsworth 220 8.4.30 Boarstall 223 8.4.31 Shabbington 226 8.4.32 Dinton 229 8.4.33 Quainton 232 8.4.34 Waddesdon 235 8.4.35 Westcott 238 8.4.36 Oakley 241 8.4.37 Worminghall 244 8.4.38 Brill 247 8.4.39 Ickford 250 8.4.40 Weedon 253 9 Conclusions and recommendations 256 Appendix A - Aylesbury Sub-Market Area flood risk management maps Appendix B - Buckingham Sub-Market Area flood risk management maps Appendix C - Aylesbury Vale Northern Area flood risk management maps Appendix D- Aylesbury Vale Southern Area flood risk management maps Appendix E - Interactive SUDS map Water cycle evidence for the Vale of Aylesbury Plan Introduction Glossary Annual Exceedance Probability – Used in this report to refer to flood risk and flood defence standard of protection. A standard of protection to the 1 in 100 year event means that the location has a 1% chance (1 in 100) of flooding in any year, this is the 1% Annual Exceedance Probability (AEP). This does not mean that if the location floods in one year, it will definitely not flood again for the next 99 years, or that if it has not flooded for the previous 99 years, that it will definitely flood this year. Annual Monitoring Report (AMR) - Assesses the implementation of the Local Development Scheme and the extent to which policies in Local Development Documents are being successfully implemented. Appropriate Assessment – Required by the Habitats Directive (92/43/EEC) for all plans or projects which, either alone or in combination with other plans or projects, would be likely to have a significant effect on a European classified conservation site, or are not directly connected with the management of the site for nature conservation. Its purpose is to assess the implications of a proposal in respect to the site’s conservation objectives. The assessment process is not specified by the regulations but is usually an iterative process at a level dependent on the location, size and significance of the proposed plan or project. English Nature can advise on whether a plan or project is likely to have a significant effect and thus require assessment. Area Action Plans – Development Plan Documents that provide a planning framework for areas of change and areas of conservation. Areas of Outstanding Natural Beauty (AONB) - Were brought into being by the same legislation as National Parks - the National Parks and Access to the Countryside Act of 1949. They are fine landscapes, of great variety in character and extent. The criteria for designation are their outstanding natural beauty. Many AONBs also fulfil a recreational role but, unlike national parks, this is not a designation criteria. The Countryside Agency and the Countryside Council for Wales are responsible for designating AONBs and advising Government on policies for their protection. Asset Management Plan (AMP) - a plan for managing an water companies’ infrastructure and other assets in order to deliver an agreed standard of service. The Asset Management Plans are submitted to Ofwat every 5 years and forms the basis by which water rates are set. These plans identify the timescales and levels of investment required to maintain and upgrade the serviceability of the assets. Biochemical oxygen demand (B.O.D) – This is the amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present in a given water sample at certain temperature over a specific time period. The term also refers to a chemical procedure for determining this amount. This is not a precise quantitative test, although it is widely used as an indication of the organic quality of water. The BOD value is most commonly expressed in milligrams of oxygen consumed per litre of sample during 5 days of incubation at 20 °C and is often used as a robust surrogate of the degree of organic pollution of Water cycle evidence for the Vale of Aylesbury Plan Introduction water.BOD can be used as a gauge of the effectiveness of wastewater treatment plants. BREEAM - The Building Research Establishment Environmental Assessment Method. This is a method of assessing the environmental sustainability of a new building. The BREEAM has been superseded by the Code for Sustainable homes for residential developments, but is still in common usage for non-residential developments. Catchment Abstraction Management Strategy (CAMS) – a strategy to assess how much water can be abstracted to meet its many economic uses – agriculture, industry, and drinking water supply – while leaving sufficient water in the environment to meet ecological needs. Catchment Flood Management Plan (CFMP) – A strategic planning tool through which the Environment Agency seeks to work with other key decision-makers within a river catchment, to identify and agree policies for sustainable flood risk management. Code for Sustainable Homes – the Code for Sustainable Homes - a new national standard for sustainable design and construction of new homes—was launched in December 2006. The code measures the sustainability of a new home against a range of sustainability criteria.