draft wrmp19 technical report - options identification this report covers supply-demand options...

Download Draft WRMP19 Technical Report - Options identification This report covers supply-demand options only;

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  • Draft WRMP19 Technical Report - Options identification

    Copyright © United Utilities Water Limited 2017 1

  • Draft WRMP19 Technical Report - Options identification

    Copyright © United Utilities Water Limited 2017 2

    Contents 1 Introduction ......................................................................................................................................... 6

    2 Overview .............................................................................................................................................. 7

    3 Unconstrained options ......................................................................................................................... 9

    3.1 Overview ...................................................................................................................................... 9

    3.2 UUWR resource management options ...................................................................................... 13

    3.2.1 Existing and new groundwater sources (GWE/GWN), surface water sources (SWE/SWN) and

    impounding reservoirs (RES) .............................................................................................................. 13

    3.2.2 Urban surface water (SWU) ............................................................................................... 15

    3.2.3 Aquifer storage and recovery (ASR) including managed aquifer recharge (MAR) ............ 16

    3.2.4 Infiltration galleries (IGA) ................................................................................................... 16

    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) ................................................................................... 17

    3.2.8 Outage reduction (OUT) ..................................................................................................... 17

    3.2.9 Raw water transfers (RWT) ................................................................................................ 17

    3.2.10 Tankering of water (TAN) ................................................................................................... 17

    3.2.11 Rain cloud seeding (RCS) .................................................................................................... 18

    3.2.12 Tidal barrages (TBA) ........................................................................................................... 18

    3.2.13 Wastewater treatment works effluent reuse (EFR) ........................................................... 18

    3.2.14 Trade effluent reuse (TER) ................................................................................................. 19

    3.2.15 Catchment management schemes (CAM) ......................................................................... 19

    3.2.16 Drought Permits and Drought Orders (DPS) ...................................................................... 20

    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) ............................. 23

    3.5 UUWN+ distribution management options ............................................................................... 24

    3.5.1 Leakage reduction through additional detection, repair and pressure management (LEA)24

    3.5.2 Leakage reduction through additional network metering (LEA) ....................................... 24

    3.5.3 Leakage reduction through infrastructure replacement (LEA) .......................................... 25

    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 ................................................................................................................... 27

    3.6.3 Water efficiency ................................................................................................................. 27

    3.7 Third party options ..................................................................................................................... 29

  • Draft WRMP19 Technical Report - Options identification

    Copyright © United Utilities Water Limited 2017 3

    3.7.1 Seeking innovation – our approach to market engagement ............................................. 29

    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 ............................................................................................................... 44

    6.1 Environmental & Social (E&S) costs ........................................................................................... 44

    6.2 Strategic Environmental Assessment (SEA) ............................................................................... 46

    6.2.1 Overview ............................................................................................................................ 46

    6.2.2 Approach ............................................................................................................................ 46

    6.3 Habitats Regulations Assessment (HRA) .................................................................................... 50

    6.3.1 Overview ............................................................................................................................ 50

    6.3.2 Approach ............................................................................................................................ 52

    6.4 Water Framework Directive (WFD)............................................................................................ 53

    6.4.1 Overview ............................................................................................................................ 53

    6.4.2 Approach ............................................................................................................................ 54

    6.5 Integrating the environmental assessment results into the options identification process ..... 55

    7 Secondary screening .......................................................................................................................... 57

    7.1 Overview .................................................................................................................................... 57

    7.2 Screening criteria ....................................................................................................................... 58

    7.2.1 Environmental and Social Costs (E&S) and AISC ranking ................................................... 58

    7.2.2 WAFU .......................................................................................

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