Final WRMP19 Technical Report - Options identification Final WRMP19 Technical Report - Options identification Contents 1. Introduction .............................................................................................................................................................. 6 1.1 Changes from draft to final WRMP ................................................................................................................... 7 2. Overview ................................................................................................................................................................... 7 3. Unconstrained options .............................................................................................................................................. 9 3.1 Overview ........................................................................................................................................................... 9 3.2 UUWR resource management options ........................................................................................................... 12 3.2.1 Existing and new groundwater sources (GWE/GWN), surface water sources (SWE/SWN) and impounding reservoirs (RES) ................................................................................................................................... 12 3.2.2 Urban surface water (SWU) .................................................................................................................... 14 3.2.3 Aquifer storage and recovery (ASR) including managed aquifer recharge (MAR) ................................. 15 3.2.4 Infiltration galleries (IGA) ........................................................................................................................ 15 3.2.5 Desalination options (DSL) ...................................................................................................................... 16 3.2.6 Conjunctive use of sources (CON) ........................................................................................................... 16 3.2.7 Reductions in level of service (LOS) ........................................................................................................ 16 3.2.8 Outage reduction (OUT) .......................................................................................................................... 16 3.2.9 Raw water transfers (RWT) ..................................................................................................................... 17 3.2.10 Tankering of water (TAN) ........................................................................................................................ 17 3.2.11 Rain cloud seeding (RCS) ......................................................................................................................... 17 3.2.12 Tidal barrages (TBA) ................................................................................................................................ 17 3.2.13 Wastewater treatment works effluent reuse (EFR) ................................................................................ 17 3.2.14 Trade effluent reuse (TER) ...................................................................................................................... 18 3.2.15 Catchment management schemes (CAM) .............................................................................................. 18 3.2.16 Drought Permits and Drought Orders (DPS) ........................................................................................... 19 3.3 UUWR production management options ....................................................................................................... 20 3.3.1 Raw water losses (RWL) and supply system operation (SSO) ................................................................. 20 3.4 UUWN+ resource management/production management options ............................................................... 22 3.4.1 Intra company transfers (ICT) ................................................................................................................. 22 3.4.2 Increasing treatment capacity (ITC) and treatment work losses (PRO) .................................................. 22 3.5 UUWN+ distribution management options .................................................................................................... 23 3.5.1 Leakage reduction through additional detection, repair and pressure management (LEA) .................. 23 3.5.2 Leakage reduction through additional network metering (LEA) ............................................................ 24 3.5.3 Leakage reduction through infrastructure replacement (LEA) ............................................................... 24 3.5.4 Reduction of customer side leakage (LEA) .............................................................................................. 25 3.6 UUWN+ customer management options ........................................................................................................ 25 3.6.1 Metering .................................................................................................................................................. 26 3.6.2 Fees and tariffs ........................................................................................................................................ 26 3.6.3 Water efficiency ...................................................................................................................................... 27 Copyright © United Utilities Water Limited 2019 2 Final WRMP19 Technical Report - Options identification 3.7 Third party options .......................................................................................................................................... 28 3.7.1 Seeking innovation – our approach to market engagement .................................................................. 28 3.7.2 Information gathering ............................................................................................................................. 30 3.7.3 Collating and assessing responses .......................................................................................................... 31 3.7.4 Third party options – summary ............................................................................................................... 31 4. Primary screening ................................................................................................................................................... 34 4.1 Overview ......................................................................................................................................................... 34 4.2 Resource Management options ...................................................................................................................... 34 4.2.1 Stage 1 - Quantitative testing ................................................................................................................. 35 4.2.2 Stage 2 - Qualitative testing .................................................................................................................... 35 4.3 Demand management options ....................................................................................................................... 36 4.4 Primary screening results ................................................................................................................................ 36 5. Feasible options ...................................................................................................................................................... 39 5.1 Overview ......................................................................................................................................................... 39 5.2 Option scopes and assumptions ..................................................................................................................... 41 6. Environmental assessments .................................................................................................................................... 43 6.1 Environmental & Social (E&S) costs ................................................................................................................ 43 6.2 Strategic Environmental Assessment (SEA) .................................................................................................... 45 6.2.1 Overview ................................................................................................................................................. 45 6.2.2 Approach ................................................................................................................................................. 46 6.3 Habitats Regulations Assessment (HRA) ......................................................................................................... 49 6.3.1 Overview ................................................................................................................................................. 49 6.3.2 Approach ................................................................................................................................................. 51 6.4 Water Framework Directive (WFD) Assessment ............................................................................................ 52 6.4.1 Overview ................................................................................................................................................