Revised Draft Drought Plan 2017 Has Been Published Following Public Consultation on the Draft Drought Plan 2017
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Revised Draft Drought Plan 2018-2023 Main report Revised Draft Drought Plan December 2017 This revised draft drought plan 2017 has been published following public consultation on the draft drought plan 2017. This document has been reviewed to assess the sensitivity of information from a national security perspective and it was not thought necessary to exclude any information. No commercially sensitive information has been excluded from this plan. We consulted on our draft drought plan in autumn 2017 for eight weeks from the 4 September 2017 until the 29 October 2017. A copy of this plan was made available on our website (at www.southeastwater.co.uk) and hard copies were available at our head office in Snodland, Kent. We also sent copies directly to our consultees: The Secretary of State for the Environment, Food and Rural Affairs Environment Agency Defra Ofwat Consumer Council for Water (CC Water) Natural England Affinity Water Portsmouth Water Southern Water Sutton and East Surrey Water Thames Water To assist consultees, we presented a list of questions that they may have wished to consider when reviewing our draft drought plan: 1. Overall structure and presentation of the plan. We have written the plan with the aim of it being accessible to the informed stakeholder and to be handy to refer to in a drought. Do you have any suggestions on how to improve the accessibility? 2. Do you think that our approach to monitoring drought and setting the triggers for action is appropriate and sets the right balance between flexibility and certainty over the drought triggers? 3. Do you have views based on your experience during recent droughts as to what in our approach went well or less well? 4. Does this draft plan provide you with an adequate understanding the temporary use ban restrictions process, which replaces the old hosepipe bans, or do you feel further explanation is required? 5. Do you think our proposed phasing of restrictions is reasonable? 6. Do you have any concerns about the implementation of restrictions, or are there any restrictions identified in this draft drought plan that you feel might be unfair to implement? 7. Do you feel our approach to implementing restrictions for certain customers (e.g. small businesses) is reasonable? 8. We feel that the introduction of emergency demand measures such as standpipes and rota cuts is only considered in the event of an unprecedented drought event (i.e. a drought that is significantly worse than anything recorded in the past). Do you think it is ever acceptable to introduce them? PAGE i Revised Draft Drought Plan December 2017 9. The analysis for this draft plan shows that our plan would not be resilient to an extreme drought (1:500 years on average) and that planning to meet such a rare even would have implications for investment of a scale that is disproportionate to the likelihood of such a drought occurring and therefore inappropriate for our customers. Do you agree? 10. Does our draft drought plan strike an appropriate balance between customer measures (temporary use bans on water use etc.) and actions that might affect the environment (e.g. reducing environmental flows in rivers)? How might the order of implementation these be changed? 11. Do feel we have addressed all potential measures? Following the public consultation, we prepared a statement of response to representations received on our draft drought plan, which accompanies this document. Based on our responses to these representations, we have made amendments or provided further information in this revised draft drought plan. The following steps will now be taken to complete our final drought plan: Publication of our statement of response and revised draft drought plan Secretary of State to review statement of response and revised draft drought plan Direction from Secretary of State that our statement of response and revised draft drought plan have been accepted Preparation of final drought plan Environment Agency review of final drought plan for compliance with Secretary of State directions Publication of final drought plan Statement from Security Manager: I certify that I have reviewed the drought plan, and can confirm it does not contain any information that would compromise national security interests. I also confirm the plan does not contain any information that may be considered commercially confidential. Barry Hayes Emergency Planning and Security Manager PAGE ii Revised Draft Drought Plan December 2017 CONTENTS EXECUTIVE SUMMARY .............................................................................. XII 1 INTRODUCTION ................................................................................. 17 1.1 OVERVIEW OF DROUGHT PLANNING PROCESS ....................................... 17 1.1.1 Regulatory background ............................................................. 17 1.2 SOUTH EAST WATER BACKGROUND INFORMATION ................................ 19 1.2.1 Water resources planning ......................................................... 19 1.2.2 The water supply area .............................................................. 24 1.3 BASELINE WATER RESOURCES SITUATION AND LEVELS OF SERVICE ........ 24 1.4 CONSULTATION ON THE DROUGHT PLAN ............................................... 25 1.4.1 Pre-draft drought plan preparation consultation ........................ 25 1.4.2 Consultation on the draft drought plan and the statement of response ................................................................................... 26 1.5 STRUCTURE OF THE DROUGHT PLAN DOCUMENT ................................... 26 2 DROUGHT MONITORING AND TRIGGERS ..................................... 28 2.1 TRIGGER ASSESSMENT AND DROUGHT ACTION LEVELS .......................... 28 2.2 STAGE 1: GROUNDWATER TRIGGERS ................................................... 29 2.3 STAGE 1: SURFACE WATER TRIGGERS ................................................. 32 2.4 STAGE 1: RECHARGE TRIGGERS .......................................................... 33 2.5 STAGE 1: DEMAND TRIGGERS.............................................................. 37 2.6 STAGE 2: OVERRIDE TRIGGERS FOR BULK SUPPLY AND SHARED USE ...... 38 2.7 STAGE 2: DROUGHT TRIGGER MATRIX .................................................. 39 2.8 DATA SOURCES AND ARRANGEMENTS .................................................. 44 2.9 ADDITIONAL HYDROMETRIC DROUGHT MONITORING ............................... 45 2.10 FORECASTING .................................................................................... 45 2.11 STAGE 3: LINK TO ACTIONS ................................................................. 46 3 DROUGHT MANAGEMENT ACTIONS .............................................. 47 3.1 DEMAND-SIDE ACTIONS ....................................................................... 47 3.1.1 Water conservation campaigns and calls for voluntary restraint (DAPD1) ................................................................................... 47 3.1.2 Operational works to reduce demand (DAPD2) ........................ 48 3.1.3 Background to the legislation and guidance for restricting customers’ water use ................................................................ 49 3.1.4 Temporary use bans (DAPD3) .................................................. 51 3.1.5 Restrictions on uses of water through a Drought Order (DAPD4) 59 3.2 SUPPLY-SIDE ACTIONS ........................................................................ 62 3.2.1 Operational works (DAPS1) ...................................................... 62 3.2.2 Infrastructural connectivity and source improvements (DAPS2) and disused sources (DAPS3) .................................................. 63 3.2.3 Shared resources and bulk transfer agreements (DAPS4 agree extensions, and DAPS5 new agreements) ............................... 64 3.2.4 Potential drought permit (DAPS6) and drought order sites (DAPS7) .................................................................................... 72 PAGE iii Revised Draft Drought Plan December 2017 3.2.5 Emergency drought planning procedures (DAPS8) .................. 79 3.2.6 Emergency drought orders (DAPS9) ........................................ 79 3.3 DROUGHT ACTIONS SUMMARY ............................................................. 81 4 ENVIRONMENTAL IMPACTS ............................................................ 89 4.1 INTRODUCTION ................................................................................... 89 4.2 ASSESSING THE RISKS TO THE ENVIRONMENT ....................................... 90 4.3 ENVIRONMENTAL ASSESSMENT OF DROUGHT PERMITS/ORDERS ............. 92 4.3.1 The River Ouse drought permits/orders (DAPS6) ................... 112 4.3.2 The River Cuckmere drought permit/order (DAPS6) .............. 125 4.3.3 The Chasewood drought permit/order (DAPS6) ..................... 132 4.3.4 The Balcombe drought permit/order (DAPS6) ........................ 133 4.3.5 The Hackenden drought permit/order (DAPS6) ...................... 135 4.3.6 The Southlands and Oakland’s licence drought permit/order (DAPS6) .................................................................................. 136 4.3.7 The Halling No.8 drought permit/order (DAPS6) ..................... 138 4.4 ENVIRONMENTAL MONITORING AND DATA PROVISION ........................... 142 4.4.1 Baseline monitoring requirements for all River Ouse Drought Permit sites ............................................................................. 142 4.4.2 Baseline monitoring