DOCSLIB.ORG

Xxxxxx Xxxxxx Environmental Statement Chapter 17. Hydrology

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Xxxxxx Xxxxxx Environmental Statement Chapter 17. Hydrology xxxxxx xxxxxx Environmental Statement Chapter 17. Hydrology and Flood Risk www.tidallagoonswanseabay.com www.tidallagoonswanseabay.com Tidal Lagoon Swansea Bay plc Contents 17.0 Hydrology and Flood Risk 17.1 Introduction .............................................................................................................................. 1 17.2 Legislative and policy context .................................................................................................. 1 17.2.1 National legislation ......................................................................................................... 1 17.2.2 Regional planning policy (September 2001) ................................................................... 3 17.2.3 Local planning policy ....................................................................................................... 4 17.2.4 Other relevant policy ...................................................................................................... 6 17.3 Assessment methodology and significance criteria ................................................................. 8 17.3.1 Assessment methodology ............................................................................................... 8 17.3.2 Significance criteria – water resources ......................................................................... 10 17.3.3 Significance criteria – flood risk .................................................................................... 12 17.4 Baseline conditions ................................................................................................................. 13 17.4.1 Study area and surface water resources ...................................................................... 13 17.4.2 Water quality ................................................................................................................ 14 17.4.3 Surface water abstractions and discharges .................................................................. 14 17.4.4 Fisheries ........................................................................................................................ 15 17.4.5 Flood risk ....................................................................................................................... 15 17.4.6 Rainfall .......................................................................................................................... 16 17.4.7 Geology and hydrogeology - geology ........................................................................... 16 17.4.8 Hydrogeological setting ................................................................................................ 16 17.4.9 Groundwater quality .................................................................................................... 20 17.4.10 Potable water supply .................................................................................................... 21 17.4.11 Foul and surface water drainage .................................................................................. 21 17.4.12 Summary of resource classification .............................................................................. 22 17.5 Potential impacts and mitigation measures ........................................................................... 22 17.5.1 Construction phase ....................................................................................................... 22 17.5.2 Operational phase ........................................................................................................ 29 17.5.3 Grid Connection ............................................................................................................ 35 17.5.4 Decommissioning phase ............................................................................................... 37 17.5.5 Residual impact assessment and conclusions .............................................................. 37 17.6 Cumulative impact and in-combination assessment ............................................................. 38 17.6.1 Overview ....................................................................................................................... 38 17.6.2 Construction impacts .................................................................................................... 40 17.6.3 Operational impacts ..................................................................................................... 41 17.7 Conclusion .............................................................................................................................. 41 17.8 References .............................................................................................................................. 42 Tidal Lagoon Swansea Bay – Environmental Statement Hydrology and Flood Risk Tidal Lagoon Swansea Bay plc 17.0 Hydrology and Flood Risk 17.1 Introduction 17.1.0.1 This Chapter presents an assessment of the potential hydrological and flood risk impacts of the Project, both within the Project area and the immediate surrounding area. It should be noted that some of the impacts relating to the hydrogeology underlying the area of the Project are assessed within Chapter 18: Land Quality and Hydrogeology Assessment of this ES. This is due to the close interrelationship between the two technical disciplines. 17.1.0.2 This Chapter identifies key water resources and sensitivities, and addresses the direct and indirect impacts of the Project on these resources. The assessment of impacts is made in the context of existing conditions (baseline conditions), predicted conditions during site preparation and construction works, those expected once the Project is completed and those associated with the decommissioning options. The need for mitigation measures is addressed, where appropriate, and any residual impacts are identified. 17.1.0.3 This Chapter, within the EIA, is supported by a Flood Consequence Assessment (FCA), which has been produced as a standalone document. The FCA assesses the potential flood risk to the existing area of the Project, identifies the potential impacts the Project may have upon flood risk and sets out mitigation measures to reduce the identified potential impacts and to allow management of associated risk, where appropriate. The FCA also fulfils the requirement under Regulation 5(2)(e) of the APFP Regulations (2009) that an application for development consent should be accompanied by a flood risk assessment. 17.1.0.4 Consultation in relation to hydrology and flood risk has been undertaken, where required, as part of the EIA process. In the preparation of this Chapter, the Environment Agency Wales (EAW, now Natural Resources Wales (NRW)), Dwr Cymru-Welsh Water (DCWW), City and County of Swansea Council (CCSC), Neath Port Talbot County Borough Council (NPTCBC) and the Countryside Council of Wales (CCW) were consulted. In addition, a variety of data sources have been consulted, such as published maps. Each data source used is referenced as appropriate. 17.2 Legislative and policy context 17.2.1 National legislation 17.2.1.1 The Water Resources Act 1991 (WRA 1991) sets out the relevant regulatory controls that provide protection to water bodies and water resources. The WRA 1991 was amended by the introduction of the Water Act 2003 (WA 2003). The WRA 1991 governs the control of water abstraction, discharge to water bodies, water impoundment, conservation and drought provision. The WRA 1991 originally excluded dewatering from engineering activities subject to controls. However, the WA 2003 now lists this activity as requiring a ‘Temporary’ or ‘Transfer’ licence. 17.2.1.2 There are other Acts of relevance to this assessment: I. the Environment Act 1995, which established the Environment Agency (EA - now Natural Resources Wales in Wales); and Tidal L agoon Swansea Bay – Environmental Statement Hydrology and Flood Risk Page 17 - 1 Tidal Lagoon Swansea Bay plc II. the Environmental Protection Act 1990, which provides for integrated pollution control. 17.2.1.3 A number of relevant regulations have also been made. These regulations include: i. the Anti-Pollution Works Regulations 1999 - which contains regulatory powers to control the pollution risk from various stored products; ii. the Groundwater Regulations (England and Wales) 2009 which transposed the EU Groundwater Directive (2006/118/EC) into UK law; iii. the Environmental Damage Regulations 2009; iv. the Water Resources Act (Amendment) (England and Wales) Regulations 2009; v. the Environmental Permitting (England and Wales) Regulations 2010 which control discharge of water to surface water and groundwater; and vi. the Water Supply (Water Quality) Regulations 2010. 17.2.1.4 The Flood and Water Management Act 2010 (FWMA 2010) received Royal Assent on the 8 April 2010. It is largely aimed at delivering the recommendations of the Pitt Review following the 2007 floods. Amongst other recommendations, FWMA 2010 states that Sustainable Drainage Systems (SUDS) must be the first choice for all new developments, and provides for adoption of SUDS by the Lead Local Flood Authority, which is either the County Council or the County Borough Council for the area. 17.2.1.5 FWMA 2010 also introduces changes to the rights to connect to sewers. Automatic connection rights are restricted only to adopted sewer schemes constructed to the new National Sewer Standard or approved SUDS schemes constructed to the new National SUDS Standard (expected October 2014). National Policy
Load more

Recommended publications
  • South Wales Gas Pipeline Project Site 276 Land South-East of Banwen Farm Blaenhonddan Neath Port Talbot
    South Wales Gas Pipeline Project Site 276 Land South-East of Banwen Farm Blaenhonddan Neath Port Talbot Archaeological Watching Brief for Rhead Group on behalf of National Grid CA Project: 9150 CA Report: 13243 Event: E000100 June 2013 South Wales Gas Pipeline Project Site 276 Archaeological Watching Brief CA Project: 9150 CA Report: 13243 Event: E000100 prepared by Peter Busby, Project Supervisor date 14 May 2013 checked by Karen E Walker Post-Excavation Manager date 4 June 2013 approved by Martin Watts Project Director, Head of Publications signed date 5 June 2013 issue 01 This report is confidential to the client. Cotswold Archaeology accepts no responsibility or liability to any third party to whom this report, or any part of it, is made known. Any such party relies upon this report entirely at their own risk. No part of this report may be reproduced by any means without permission. © Cotswold Archaeology Cirencester Milton Keynes Andover Building 11 Unit 4 Office 49 Kemble Enterprise Park Cromwell Business Centre Basepoint Business Centre Kemble, Cirencester Howard Way, Newport Pagnell Caxton Close, Andover Gloucestershire, GL7 6BQ MK16 9QS Hampshire, SP10 3FG t. 01285 771022 t. 01908 218320 t. 01264 326549 f. 01285 771033 e. [email protected] © Cotswold Archaeology South Wales Gas Pipeline Project Site 276: Archaeological Watching Brief CONTENTS SUMMARY ..................................................................................................................... 2 1. INTRODUCTION ...............................................................................................
    [Show full text]
  • Landscape and Seascape Supplementary Planning Guidance (Consultation Draft – March 2018)
    - Landscape and Seascape Supplementary Planning Guidance (Consultation Draft – March 2018) www.npt.gov.uk/ldp Contents Note to Reader 1 1 Introduction 1 2 The Landscapes and Seascapes of Neath Port Talbot 3 3 Evaluating the Impacts of Change and Development 9 3.1 Impacts on Landscapes and Seascapes 9 3.2 Landscape and Visual Impact Assessment 10 4 Policy Context 12 5 Landscape Policy Implementation 14 5.1 Landscape in the Design Process 14 5.2 Policy Implementation 14 6 Seascape Policy Implementation 39 6.1 Seascape in the Design Process 39 6.2 Policy Implementation 40 7 Monitoring and Review 43 Appendices A Relevant LDP Policies 44 Supplementary Planning Guidance: Landscape and Seascape (Consultation Draft - March 2018) Contents Supplementary Planning Guidance: Landscape and Seascape (Consultation Draft - March 2018) Note to Reader Note to Reader This note explains the purpose of the Supplementary Planning Guidance (SPG) and how to comment on the document. This note will not form part of the final published SPG. The Purpose of the Document The Council, at its meeting on the 27th January 2016, adopted the Local Development Plan (LDP) which now provides the basis for decisions on land use planning in the County Borough up to 2026. Whilst the LDP contains sufficient information and policies to provide the basis for the determination of planning applications through the development management process, opportunities have been identified throughout the Plan for further detailed guidance to be provided on particular issues. Selective use of SPG is a means of setting out more detailed topic or site specific guidance on the way in which the policies of the LDP will be applied in particular circumstances or areas.
    [Show full text]
  • Programme – Swansea Ramblers We Offer Short & Long Walks All Year
    Programme – Swansea Ramblers We offer short & long walks all year around and welcome new walkers to try a walk with us. 1 Front Cover Photograph: Exploring countryside above Crynant v14 2 Swansea Ramblers’ membership benefits & events We have lots of walks and other events during the year so we thought you may like to see at a glance the sort of things you can do as a member of Swansea Ramblers: Programme of walks: We have long, medium & short walks to suit most tastes. The summer programme runs from April to September and the winter programme covers October to March. The programme is emailed & posted to members. Should you require an additional programme, this can be printed by going to our website. Saturday walks: Weekly Saturday walks are a great way to begin exploring the countryside and are no more than 6 miles in length. Occasionally there may be a longer walk in addition to the shorter walk. Sunday walks: These alternate every other week between longer, harder walking for the more experienced walker and a medium walk which offers the next step up from the Saturday walks. Weekday walks: These take place on different days and can vary in length. Most are published in advance but we also have extra weekday walks at short notice. Short Introductory walks: We provide occasional 2-3 mile walks, mostly on a weekday as an introduction to walking. Evening walks: These are about 2-3 miles and we normally provide these in the summer. We hope to offer more in the future. Social events: These include events such as meals out or boat trips on the Tawe.
    [Show full text]
  • Landscape and Seascape Supplementary Planning Guidance (May 2018)
    - Landscape and Seascape Supplementary Planning Guidance (May 2018) www.npt.gov.uk/ldp Contents Note to Reader 1 1 Introduction 1 2 The Landscapes and Seascapes of Neath Port Talbot 3 3 Evaluating the Impacts of Change and Development 9 3.1 Impacts on Landscapes and Seascapes 9 3.2 Landscape and Visual Impact Assessment 10 4 Policy Context 12 5 Landscape Policy Implementation 14 5.1 Landscape in the Design Process 14 5.2 Policy Implementation 14 6 Seascape Policy Implementation 39 6.1 Seascape in the Design Process 39 6.2 Policy Implementation 40 Supplementary Planning Guidance: Landscape and Seascape (May 2018) 7 Monitoring and Review 43 Appendices A Relevant LDP Policies 44 Contents Supplementary Planning Guidance: Landscape and Seascape (May 2018) Note to Reader Note to Reader This document supplements and explains the policies in the Local Development Plan (LDP). The LDP was adopted by the Council on 27th January 2016 and forms the basis for decisions on land use planning in the County Borough up to 2026. This Supplementary Planning Guidance (SPG) has been prepared following a public consultation exercise that was undertaken in the Spring of 2018 and the guidance was adopted by the Council's Regeneration and Sustainable Development Cabinet Board on 18th May 2018. While only policies in the LDP have special status in the determination of planning applications, the SPG will be taken into account as a material consideration in the decision making process. This SPG is also available in Welsh, either to download or by request. Should you need this document in another format, then please contact the LDP team at [email protected] or [01639] 686821.
    [Show full text]
  • Pennant Walters Mynydd Bwllfa Wind Farm
    Pennant Walters Mynydd Bwllfa Wind Farm Environmental Statement April 2009 Entec UK Limited Copyright and Non-Disclosure Notice The contents and layout of this report are subject to copyright owned by Entec (© Entec UK Limited 2009) save to the extent that copyright has been legally assigned by us to another party or is used by Entec under licence. To the extent that we own the copyright in this report, it may not be copied or used without our prior written agreement for any purpose other than the purpose indicated in this report. The methodology (if any) contained in this report is provided to you in confidence and must not be disclosed or copied to third parties without the prior written agreement of Entec. Disclosure of that information may constitute an actionable breach of confidence or may otherwise prejudice our commercial interests. Any third party who obtains access to this report by any means will, in any event, be subject to the Third Party Disclaimer set out below. Third Party Disclaimer Any disclosure of this report to a third party is subject to this disclaimer. The report was prepared by Entec at the instruction of, and for use by, our client named on the front of the report. It does not in any way constitute advice to any third party who is able to access it by any means. Entec excludes to the fullest extent lawfully permitted all liability whatsoever for any loss or damage howsoever arising from reliance on the contents of this report. We do not however exclude our liability (if any) for personal injury or death resulting from our negligence, for fraud or any other matter in relation to which we cannot legally exclude liability.
    [Show full text]
  • Landscape Assessment
    NEATH PORT TALBOT LANDMAP LANDSCAPE ASSESSMENT Final Report Neath Port Talbot County Borough Council Countryside Council for Wales December 2004 WHITE consultants Main Cover Photograph: Upper Clydach River Valley towards Pontardulais 18-19, Park Place Cardiff Small Cover Photographs: CF10 1FL Aberavon Sands & Margam Works Tel: 029 2064 0971 Mynydd Bromil Scarp Fax: 029 2064 0973 Cwm Afan at Pontrhydyfen Email:[email protected] Mynydd Gwrhyd Website: www.whiteconsultants.co.uk Cwmgors Final Report Neath Port Talbot Landscape Assessment ACKNOWLEDGEMENTS This study has been undertaken under the guidance of a client steering group and a wider local information users group. We would like to thank the members of both groups for their guidance and, in particular, the individuals in the client group for their support. Client Steering Group: Owain Lewis Neath Port Talbot County Borough Council Jill Bullen Countryside Council for Wales Rebecca Wright Countryside Council for Wales Local Information Users Group The Group comprised of the above and the following: Ruth Brown Brecon Beacons National Park Steve Moon Bridgend CBC Michael Gandy Celtic Energy Ltd. Brian Humphreys City & County of Swansea Julian Atkins City & County of Swansea Richard Beale City & County of Swansea David Eagar Countryside Council for Wales Russell De’Ath Countryside Council for Wales Caroline Wheeler EL & LLL, Port Talbot Lyndsey Taylor Forestry Commission Andrew Sowerby Forest Enterprise Nigel Ajax-Lewis Glamorgan Wildlife Trust Delyth Lewis Groundwork Bridgend Neath Port Talbot CBC Alun Pugh Menter Iaith Tawe, Afan, Nedd Iona Gregory Menter Iaith Tawe, Afan, Nedd Doreen Jones [NALC] Community Councils Rep Tim Dorken National Assembly for Wales Basil Hollington NAWAD Cllr.
    [Show full text]
  • Xxxxxx Xxxxxx Environmental Statement Chapter 13. Seascape
    xxxxxx xxxxxx Environmental Statement Chapter 13. Seascape Landscape and Visual Impact Assessment www.tidallagoonswanseabay.com www.tidallagoonswanseabay.com Tidal Lagoon Swansea Bay plc Contents 13.0 Seascape & Landscape Visual Impact Assessment ...................................................................... 1 13.1 Introduction ................................................................................................................................... 1 13.2 Relevant legislation and policy ...................................................................................................... 2 13.3 Approach and methods ................................................................................................................. 2 13.3.1 Study area ......................................................................................................................... 3 13.3.2 Desk study ........................................................................................................................ 4 13.3.3 Site visits ........................................................................................................................... 5 13.3.4 Identification of regional Seascape Units, local Seascape Units and Landscape Character Areas ................................................................................................................................. 5 13.3.5 Assessment of effects on seascape and landscape character .......................................... 6 13.3.6 Baseline visual assessment
    [Show full text]
  • Maps and Tables Switched Round
    Flood Risk Management Plan 2015 Neath Port Talbot County Borough Council WWW.NPT.GOV.UK Table of Contents 1.0 Foreword ................................................................................................ 1 2.0 Introduction ............................................................................................ 2 3.0 Purpose of Flood Risk Management Plans in Managing Flood Risk ....... 4 3.1 What is a Flood Risk Management Plan? ............................................... 4 3.2 What is included in this FRMP ............................................................... 4 3.3 Legislative Context................................................................................. 5 4.0 Study Area .......................................................................................... 10 4.1 Administrative Area ............................................................................. 10 4.2 Flood Risk in NPTCBC ........................................................................ 11 4.3 Preliminary Flood Risk Assessment ..................................................... 12 4.4 Top communities at risk from surface water flooding in Neath Port Talbot ............................................................................................................ 16 4.5 Conclusions on a Borough Wide Level ................................................ 18 5.0 How we currently manage flood risk in Neath Port Talbot .................. 19 5.1 How we prioritise our work .................................................................
    [Show full text]
  • Consultancy Services for the Provision of Landscape Advice
    NEATH PORT TALBOT COUNTY BOROUGH COUNCIL ConsultancyConsultancy ServicesServices ForFor TheThe ProvisionProvision Of LLandscapeandscape AdAdvicevice Contract No. 049/2009 Final ReportReport June 20112011 NEATH PORT TALBOT COUNTY BOROUGH COUNCIL CONSULTANCY SERVICES FOR THE PROVISION OF LANDSCAPE ADVICE CONTRACT NO 049/2009 FINAL REPORT JUNE 2011 TACP 10 PARK GROVE CARDIFF CF10 3BN Revision No. Date of Revision Checked by Date Approved by Date 0 04.04.11 JW 04.04.11 LAJ 04.04.11 1 16.06.11 JW 16.06.11 LAJ 16.06.11 C O N T E N T S Page No 1.0 INTRODUCTION 1 2.0 BACKGROUND 3 3.0 APPROACH AND METHODOLOGY 5 4.0 TASK 1: AREAS OF UNACCEPTABILITY 10 5.0 TASK 2: SPECIAL LANDSCAPE AREAS 44 6.0 TASK 3: GREEN WEDGES 82 7.0 TASK 4: MINERAL BUFFER ZONES 89 8.0 SUMMARY AND CONCLUSIONS 95 ABBREVIATIONS BCBC Bridgend County Borough Council CCW Countryside Council for Wales EA Environment Agency Wales EIP Examination in Public GIS Geographic Information System IPG Interim Planning Guidance LDP Local Development Plan MTAN Mineral Technical Advice Note NPTCBC Neath Port Talbot County Borough Council PPW Planning Policy Wales RCTCBC Rhondda Cynon Taf County Borough Council RWP Regional Waste Plan SAM Scheduled Ancient Monument SEA Strategic Environmental Assessment SLA Special Landscape Area SPG Supplementary Planning Guidance SSSI Site of Special Scientific Interest TAN Technical Advice Note UDP Unitary Development Plan WG Welsh Government 1.0 INTRODUCTION 1.1 TACP Environmental Consultants were commissioned by Neath Port Talbot County Borough Council (NPTCBC) in January 2010 to provide landscape advice to assist with the preparation of the Local Development Plan (LDP).
    [Show full text]
  • Environmental Statement (Volume
    CELTIC ENERGY LIMITED NANT HELEN COMPLEMENTARY RESTORATION EARTHWORKS ENVIRONMENTAL STATEMENT JANUARY 2020 Celtic Energy Ltd Nant Helen Complementary Restoration Earthworks 1 Introduction 1.1.1 This Environmental Statement (ES) has been prepared to support the full planning application submitted to Powys County Council (PCC) and Neath Port Talbot County Borough Council (NPTCBC) for the proposed Nant Helen Complimentary Restoration Earthworks. 1.2 Proposed development 1.2.1 The proposed Restoration Earthworks are to include the following: • Earthworks to include cutting and embankment; and • Drainage works associated with the revised landform. 1.2.2 For the purposes of this ES, the elements of these Nant Helen Complimentary Restoration Earthworks are referred to as ‘the Project’. 1.3 Site location 1.3.1 The planning application site boundary is shown on Figure 1.1 and covers an area of approximately 179ha. 1.3.2 The Project site is within the Dulais Valley located within Powys and Neath Port Talbot, with the Brecon Beacons National Park Authority boundary immediately to the north. Nearby settlements include Onllwyn, Seven Sisters, Ystradgynlais, Caehopkin, Abercrave or Coelbren. The site is predominantly brownfield land that has been heavily worked by open cast mining. Much of the site has been revegetated. 1.4 Project context 1.4.1 The proposed site is currently being mined by Celtic Energy, who will cease extraction operations in 2021, at which point Celtic Energy will be required to restore the land in accordance with regulatory requirements and agreements with PCC. This includes s106 planning obligations and planning conditions that need to be discharged.
    [Show full text]
  • Cwrt Sart Comprehensive School, Old Road, Neath Port Talbot
    Cwrt Sart Comprehensive School, Old Road, Neath Port Talbot Archaeological Written Scheme of Investigation Prepared For Neath Port Talbot County Borough Council by The Glamorgan-Gwent Archaeological Trust Ltd (GGAT Projects) July 2016 Project No P1846 Report No. 2016/043 NGR SS 74431 95398 Cwrt Sart Comprehensive School, Old Road, Neath Port Talbot: archaeological written scheme of investigation Contents Page Summary ..................................................................................................................................... 3 Acknowledgements ..................................................................................................................... 4 Copyright notice ......................................................................................................................... 4 Abbreviations .............................................................................................................................. 4 1 Introduction ....................................................................................................................... 5 1.1 Development proposal and planning background ........................................................... 5 1.2 Site description ................................................................................................................ 5 1.3 General archaeological background ................................................................................ 5 1.4 Specific archaeological background ...............................................................................
    [Show full text]
  • More Relative Hills of Britain
    MORE RELATIVE HILLS OF BRITAIN Mark Jackson Data from work by Alan Dawson, E. J. Yeaman, Clem Clements, Rob Woodall, Bernie Hughes, Pete Ridges, and many others collected in The Database of British Hills retabulated by David Stone More Relative Hills of Britain More Relative Hills of Britain Hills in Britain and nearby islands with 100 m of prominence grouped by their parents Mark Jackson using data from work by Alan Dawson, E. J. Yeaman, Clem Clements, Rob Woodall, Bernie Hughes, Pete Ridges, and many others collected in The Database of British Hills retabulated by David Stone Published on the Marilyn News Centre website, http://www.rhb.org.uk/humps/. Text copyright © 2009 Mark Jackson. Typographical arrangement and preface section copyright © 2009 David Stone. The database rights of the compilers of the Database of British Hills are acknowl- edged. Front cover: the Old Man of Hoy; original photograph, entitled As close as we could get, copyright © 2007 ‘Effervescing Elephant’, available at http://www.flickr.com/ photos/cr01/771442391/ and licenced under the Creative Commons Attribution- Share Alike 2.0 Generic License. The base for the index maps of the topo sections is copyright © 2008 a Wikipedia con- tributor ‘Equestenebrarum’, and licenced under the Creative Commons Attribution 3.0 Unported license, http://creativecommons.org/licenses/by/3.0/deed.en. This work is licenced under the Creative Commons Attribution-Share Alike 2.0 UK: England & Wales License. To read this licence, see http://creativecommons.org/ licenses/by-sa/2.0/uk/ or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California 94105, USA.
    [Show full text]