MANSFIELD DISTRICT COUNCIL Water Cycle Strategy - Scoping Study Final Report June 2009 For: © RPS MANSFIELD DISTRICT COUNCIL Willow Mere House Civic Centre Compass Point Business Park Chesterfield Road South Stocks Bridge Way Mansfield St Ives Nottinghamshire Cambridgeshire NG19 7BH PE27 5JL Telephone: +44 (0) 1480 466335 Fax: +44 (0) 1480 466911 E-mail: [email protected] www.rpsgroup.com Notice to Interested Parties To achieve the study objectives stated in this report, we were required to base our conclusions on the best information available during the period of the investigation and within the limits prescribed by our client in the agreement. No investigative method can completely eliminate the possibility of obtaining partially imprecise or incomplete information. Thus, we cannot guarantee that the investigations completely defined the degree or extent of e.g. species abundances or habitat management efficacy described in the report. Document Information Report title: Mansfield District Council: Water Cycle Strategy Scoping Study – Final Report Client: Mansfield District Council Document ref: JPP2178-R-001c Project manager: Rob Pilcher Author(s)/Surveyor: Rob Pilcher Report date: 06/09 Checked by: Jonathan Harris JH 10/06/09 Authorised by: Max Wade MW 10/06/09 2 CONTENTS 0 EXECUTIVE SUMMARY .....................................................................................1 Scoping study objectives ..........................................................................................1 Outputs......................................................................................................................1 Data sources..............................................................................................................1 Co-operation.............................................................................................................2 1 INTRODUCTION.................................................................................................3 Background ...............................................................................................................3 Objectives of this water cycle scoping study..........................................................4 2 DATA COLLECTION AND METHODOLOGY ...............................................5 Overview ...................................................................................................................5 Location of growth ...................................................................................................6 Flood risk...................................................................................................................7 Water resources and supply....................................................................................7 Waste water collection and treatment..................................................................9 Data Limitations.....................................................................................................10 3 GROWTH AND DEVELOPMENT ...................................................................10 Policy context .........................................................................................................10 National – Planning Policy Statements (PPS)............................................................................. 10 The East Midlands Regional Plan .................................................................................................. 11 Potential growth areas...........................................................................................12 4 WATER CYCLE INFRASTRUCTURE AND ASSETS....................................15 Flood risk.................................................................................................................15 River Meden Catchment ................................................................................................................ 16 River Maun Catchment................................................................................................................... 16 Water resources and supply..................................................................................16 Waste water collection and treatment................................................................20 i 5 WATER CYCLE MANAGEMENT....................................................................22 Flood risk management .........................................................................................22 Abstraction management......................................................................................23 Waste water management....................................................................................26 Water management...............................................................................................30 Water demand management......................................................................................................... 30 Water Framework Directive ........................................................................................................ 32 Biodiversity........................................................................................................................................ 32 Green infrastructure ....................................................................................................................... 34 Climate change ................................................................................................................................. 36 6 WATER CYCLE INFRASTRUCTURE CONSTRAINTS ON GROWTH.....39 Flood risk scoping ...................................................................................................39 Flooding from a watercourse........................................................................................................ 39 Flooding from runoff ....................................................................................................................... 39 Flooding from sewers ..................................................................................................................... 40 Water resources and supply risks scoping ...........................................................44 Failure of water supply.................................................................................................................... 44 Inadequate water supply delivery infrastructure ...................................................................... 48 Waste water collection and treatment scoping ..................................................51 Inadequate waste water collection infrastructure ................................................................... 51 Capacity of sewage treatment works.......................................................................................... 52 Water quality targets ...................................................................................................................... 53 7 CONCLUSIONS.................................................................................................57 Flood risk.................................................................................................................58 Water resources and supply..................................................................................59 Waste water collection and treatment................................................................60 8 RECOMMENDATIONS .....................................................................................62 Mansfield Urban Area ............................................................................................64 Southern Corridor..................................................................................................64 Pleasley Hill Regeneration Area ...........................................................................64 North of Forest Town ............................................................................................64 Market Warsop.......................................................................................................64 9 REFERENCES......................................................................................................65 ii TABLES Table 1: Estimated development potential..........................................................13 Table 2: Gauging Station Register ........................................................................23 Table 3a: Water Chemistry Grades .....................................................................29 Table 3b: Biology Grades.......................................................................................29 Table 3c: Phosphate Grades..................................................................................29 Table 3d: Nitrate Grades.......................................................................................30 Table 4: Flood risk constraints ..............................................................................43 Table 5: Projected supply-demand balances for the East Midlands WRZ ........45 Table 6: Water supply constraints........................................................................50 Table 7: Waste water treatment and collection constraints .............................55 Table 8: Summary constraints assessment..........................................................57 FIGURES Figure 1 – Indicative Growth Areas........................................................................8 Figure 2 – Example site specific water mains schematic....................................17