West Oxfordshire Water Cycle Study: Phase 1 Scoping Study
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Final version Submitted to Submitted by West Oxfordshire District Council AECOM Midpoint Alençon Link Basingstoke Hampshire RG21 7PP United Kingdom West Oxfordshire Water Cycle Study: Phase 1 scoping study November 2016 AECOM West Oxfordshire Scoping Water Cycle Study Page i Prepared by: Amy Ruocco Checked by: Carl Pelling Senior Water and Flood Risk consultant Associate Director Approved by: Sarah Kelly Regional Director Rev No Comments Checked Approved Date by by 1 First Draft for stakeholder comment CP SK Sept. 2016 2 Final report CP SK Nov 2016 Midpoint, Alençon Link, Basingstoke, Hampshire, RG21 7PP, United Kingdom Telephone: 01256 310 200 Website: http://www.aecom.com Job No 60505363 West Oxfordshire Scoping Water Cycle Study – Final November 2016 AECOM West Oxfordshire Scoping Water Cycle Study Page ii Limitations AECOM Infrastructure & Environment UK Limited (“AECOM”) has prepared this Report for the sole use of West Oxfordshire District Council (“Client”) in accordance with the Agreement under which our services were performed [AECOM Proposal. April 2016]. No other warranty, expressed or implied, is made as to the professional advice included in this Report or any other services provided by AECOM. The conclusions and recommendations contained in this Report are based upon information provided by others and upon the assumption that all relevant information has been provided by those parties from whom it has been requested and that such information is accurate. Information obtained by AECOM has not been independently verified by AECOM, unless otherwise stated in the Report. The methodology adopted and the sources of information used by AECOM in providing its services are outlined in this Report. The work described in this Report was undertaken between June 2016 and November 2016 and is based on the conditions encountered and the information available during the said period of time. The scope of this Report and the services are accordingly factually limited by these circumstances. AECOM disclaim any undertaking or obligation to advise any person of any change in any matter affecting the Report, which may come or be brought to AECOM’s attention after the date of the Report. Certain statements made in the Report that are not historical facts may constitute estimates, projections or other forward- looking statements and even though they are based on reasonable assumptions as of the date of the Report, such forward-looking statements by their nature involve risks and uncertainties that could cause actual results to differ materially from the results predicted. AECOM specifically does not guarantee or warrant any estimate or projections contained in this Report. Copyright © This Report is the copyright of AECOM Infrastructure & Environment UK Limited. Any unauthorised reproduction or usage by any person other than the addressee is strictly prohibited. West Oxfordshire Scoping Water Cycle Study – Final November 2016 AECOM West Oxfordshire Scoping Water Cycle Study Page iii Contents Executive Summary ............................................................................................................................................................. 1 1 Introduction .................................................................................................................................................................. 3 1.1 Background ........................................................................................................................................................... 3 1.2 Objectives of the Water Cycle Study ..................................................................................................................... 3 2 West Oxfordshire Water Cycle Study......................................................................................................................... 5 2.1 The Water Cycle .................................................................................................................................................... 5 2.2 Implications for Development ................................................................................................................................ 5 2.3 Stages of a Water Cycle Study .............................................................................................................................. 6 2.3.1 Scoping Water Cycle Study .......................................................................................................................... 6 2.3.2 Outline and Detailed Water Cycle Studies .................................................................................................... 7 2.4 Integration with the Planning System .................................................................................................................... 7 2.5 National, Regional and Local Drivers and Policies ................................................................................................ 8 2.5.1 Local Drivers and Policies ............................................................................................................................. 9 2.5.2 Water Company Planning ............................................................................................................................. 9 3 Development in West Oxfordshire ........................................................................................................................... 11 3.1 West Oxfordshire ................................................................................................................................................. 11 3.2 West Oxfordshire sub areas ................................................................................................................................ 12 3.2.1 Housing growth ........................................................................................................................................... 12 3.2.2 Employment Growth ................................................................................................................................... 13 4 Water Cycle Environment and Infrastructure baseline ........................................................................................... 14 4.1 Introduction .......................................................................................................................................................... 14 4.2 Water Environment .............................................................................................................................................. 14 4.2.1 Climate ........................................................................................................................................................ 14 4.2.2 Geology & Groundwater ............................................................................................................................. 14 4.2.3 Rivers .......................................................................................................................................................... 15 4.2.4 WFD Status................................................................................................................................................. 16 4.2.5 Cotswolds Catchment ................................................................................................................................. 20 4.2.6 Abstractions ................................................................................................................................................ 20 4.2.7 Sewerage Discharges ................................................................................................................................. 20 4.3 Ecology and Biodiversity ..................................................................................................................................... 21 4.4 Flood Risk ........................................................................................................................................................... 22 4.5 Water Resources and Supply .............................................................................................................................. 24 4.5.1 Water Resource Management .................................................................................................................... 24 4.5.2 Water Supply .............................................................................................................................................. 25 4.5.3 Water supply infrastructure ......................................................................................................................... 25 4.6 Wastewater Treatment and Collection................................................................................................................. 25 4.6.1 Wastewater Treatment infrastructure .......................................................................................................... 29 5 Findings, Constraints and Recommendations ........................................................................................................ 30 5.1 Water Resources ................................................................................................................................................. 30 5.1.1 Summary .................................................................................................................................................... 30 5.2 Water Quality ......................................................................................................................................................