REVISED DRAFT DROUGHT PLAN 2019 June 2019 1 Part One Part Two Part Three Abbreviations Drought Plan Framework Technical Background Operational Drought Plan and Glossary and Regional Overview FOREWORD This report is Anglian Water’s revised draft cuts during a severe drought. A severe drought is Drought Plan 2019. It is an update of our revised defined a drought event with an approximate 1 in draft Drought Plan 2019, to reflect the comments 200 year return period. we have received through the statutory consultation period. To ensure alignment of the two plans, we have reviewed the measures that we have in place We have considered all representations and have to maintain secure water supplies during both produced a Statement of Response to accompany the worst recorded drought and 1 in 200 year this updated report, which outlines any changes drought for all our water sources. The revised we have made to our plan within 15 weeks of the draft Drought Plan sets out the management publication of the draft Drought Plan 2019. actions that we will take before, during and after a drought. The revised draft Drought Plan was prepared four years and three months after the approval and The Drought Plan is not strategic but outlines publication of our Drought Plan 2014, in line with a framework for managing a drought were it to the Drought Plan Direction 20161. occur under present circumstances with existing infrastructure. It provides an overview on how we propose to manage water resources during a drought to An additional change considered in this revised protect public water supplies, whilst minimising draft Drought Plan is that in April 2017 the any environmental impacts that may arise as a water retail market opened. As a result, business result of our activities. customers no longer buy water services from us directly and we work with retailers via our We are presenting this revised draft Drought Plan Wholesale Service Centre. As the wholesaler, we to the Secretary of State for Environment, Food maintain our commitment to ensuring a secure and Rural Affairs, to seek permission to publish supply of water for all customers. the final plan. Our revised draft Drought Plan 2019 is structured There have been no major drought events since in three parts: the Drought Plan 2014 so the 2010-12 drought period still remains our most recent reference • Part 1, Drought Plan Framework and Regional drought. However this revised draft Drought Plan Overview has been updated to reflect wider developments in our drought and water resources planning. • Part 2, Drought Plan Technical Background We published our draft Water Resources • Part 3, Operational Drought Plan Management Plan 2019 in March 2018 for consultation, and our revised draft is now with These can be read in order or separately. Defra for final approval. This presents a revision to our Levels of Service, ensuring that by the end of AMP7 no customer will be exposed to rota 1 Department for Environment, Food and Rural Affairs (2016) The Drought Plan (England) Direction 2016 2 Part One Part Two Part Three Abbreviations Drought Plan Framework Technical Background Operational Drought Plan and Glossary and Regional Overview CONTENTS PART ONE: DROUGHT PLAN FRAMEWORK AND REGIONAL OVERVIEW 5 • 1.1 Introduction 6 • 1.2 Purpose of Plan 7 • 1.3 Regulatory Framework 8 • 1.4 Consultation 9 • 1.4.1 Pre-consultation 9 • 1.4.2 Public consultation 9 • 1.5 Regional Overview 9 • 1.5.1 Our Region 9 • 1.5.2 Our water sources 11 • 1.5.3 Bulk Supply Agreements and Inset Appointments 13 PART TWO: TECHNICAL BACKGROUND 14 • 2.1 Water Resource Planning 15 • 2.1.1 Relationship with the Water Resources Management Plan 15 • 2.1.2 Levels of Service 15 • 2.2 Drought Management and Investment to Date 16 • 2.2.1 Pre-privatisation 16 • 2.2.2 Post-privatisation 17 • 2.3 How drought affects our resources 22 • 2.4 Drought testing 23 • 2.4.1 Reference drought 23 • 2.4.2 Production of drought events 25 • 2.4.2.1 Historic droughts 25 • 2.4.2.2 Stochastic drought 25 • 2.4.3 Managing the impact of drought 26 • 2.4.4 Drought and Climate Change 26 • 2.5 Regional drought planning 27 PART THREE: OPERATIONAL DROUGHT PLAN 28 • 3.1 Drought Management Process Overview 29 • 3.2 Normal / non-drought conditions 32 • 3.2.1 Routine monitoring 32 • 3.2.2 Abstraction licence compliance 33 • 3.3 Recognising the start of a drought 34 • 3.3.1 Early warning indicators 34 • 3.4 Drought triggers and scenarios 36 • 3.4.1 Reservoir Drought Tiggers 36 • 3.4.1.1 Control curves 36 • 3.4.1.2 Normal Operating Curve 36 3 Part One Part Two Part Three Abbreviations Drought Plan Framework Technical Background Operational Drought Plan and Glossary and Regional Overview • 3.4.1.3 Drought Permit Trigger Curve 36 • 3.4.1.4 Drought Management Curves 36 • 3.4.2 Testing the reservoir curves and actions 37 • 3.4.2.1 Scenario testing 38 • 3.4.3 Direct Supply River Intakes Drought Triggers 39 • 3.4.4 Need for Drought Permits 40 • 3.4.5 Groundwater systems triggers 40 • 3.4.5.1 Drought Vilnerable Groundwater Sources 41 • 3.5 Drought Forecasting 43 • 3.5.1 Reservoir Drought Forecasting 43 • 3.5.2 Direct River Intake Drought Forecasting 44 • 3.5.3 Groundwater Source Drought Forecasting 45 • 3.6 Drought Response Actions 46 • 3.6.1 Demand Side Management Actions 47 • 3.6.1.1 Publicity Campaigns 47 • 3.6.1.2 Meter Optants 48 • 3.6.1.3 Leakage 48 • 3.6.1.4 Temporary Use (Hosepipe) Bans (Level of Service 1) 49 • 3.6.1.5 Non-Essential Use Ban Restrictions (non-domestic customers) (Levels of Service 2) 51 • 3.6.1.6 Emergency Drought Order (Level of Service 3) 52 • 3.6.1.7 Other Demand Management Options 53 • 3.6.2 Supply Side Drought Management Actions 53 • 3.6.2.1 Reservoir Drought Management Actions 54 • 3.6.2.2 Direct Intakes Drought Management Actions 55 • 3.6.2.3 Drought Management Actions for Groundwater Sources 56 • 3.6.2.4 Additional Supply Side Management Options 58 • 3.7 Drought Permits and Drought Orders 59 • 3.8 Minimising the Impact of Drought on the Environment 63 • 3.8.1 Environmental Assessments 63 • 3.8.2 Environmental Monitoring Plan 64 • 3.8.3 Water Framework Directive (WFD) Assessment 64 • 3.8.4 Habitats Regulations Assessment (HRA) 64 • 3.8.5 Strategic Environmental Assessment (SEA) 64 • 3.9 Drought Management and Communication 65 • 3.9.1 Drought Management Team 65 • 3.9.2 Emergency Planning Team 66 • 3.9.3 External Drought Management 67 • 3.9.4 Communications Plan 67 • 3.10 Post Drought Actions 70 ABBREVIATIONS AND ACRONYMS 71 GLOSSARY 75 4 PART ONE DROUGHT PLAN FRAMEWORK AND REGIONAL OVERVIEW 5 Part One Part Two Part Three Abbreviations Drought Plan Framework Technical Background Operational Drought Plan and Glossary and Regional Overview PART ONE DROUGHT PLAN FRAMEWORK AND REGIONAL OVERVIEW Part One of our revised draft Drought Plan 2019 presents the framework and relevant regulation for water company drought planning. It also provides an overview of our region and water sources. 1.1 Introduction completed pre-consultation with key stakeholders and have sought approval from the Secretary of There is a statutory requirement for all water State for publication of the draft plan for public companies to prepare and maintain a Drought Plan consultation. that sets out how we will ensure continued supply to customers when water resources may become The revised draft Drought Plan 2019 is consistent depleted during periods of low rainfall. with our revised draft Water Resources Management Plan (dWRMP) 2019 which sets out how we intend This is Anglian Water’s revised draft Drought Plan to secure water supply over the next 25 years. 2019 that has been prepared to update our Drought Our revised draft Drought Plan 2019 considers our Plan 2014. It builds on developments in our drought drought response for the Anglian Water region and and water resources planning approaches, as well Hartlepool, as shown in Figure 1.1 below. as feedback received during the pre-consultation phase. The Drought Plan is a technical document written primarily for our regulators, as well as other This is the fifth formal Drought Plan that we have technical stakeholders, following principles set out produced since the first in 2000. This plan has been in the guideline. A separate Summary document will prepared following the Environment Agency’s ‘Water provide a non-technical overview of our plan, which Company Drought Plan Guideline’ (as updated in will be made available when we publish our revised July 2015). In accordance with the guidelines we draft Drought Plan 2019. Figure 1.1: The Anglian Water region including Hartlepool GRIMSBY HARTLEPOOL LINCOLN GRANTHAM KING’S LYNN NORWICH PETERBOROUGH HUNTINGDON DAVENTRY NORTHAMPTON IPSWICH MILTON KEYNES South Essex COLCHESTER 6 Part One Part Two Part Three Abbreviations Drought Plan Framework Technical Background Operational Drought Plan and Glossary and Regional Overview Our revised draft Drought Plan 2019 is structured in three parts; each can be read in order or separately. Table 1.1: Structure of our revised draft Drought Plan 2019 Drought Plan Part Title Content Drought Plan • purpose of plan Part One Framework and • regulatory framework Regional Overview • regional overview • links to the revised dWRMP 2019 Drought Plan • previous drought investment Part Two Technical Background • vulnerability analysis • scenario testing • our drought management strategy • drought monitoring, triggers and forecasting Operational Part Three • measures we would take to manage supply and demand during a Drought Plan drought • environmental mitigation 1.