Habitats Regulations Assessment June 2021
Total Page:16
File Type:pdf, Size:1020Kb
Horsham Local Plan Habitats Regulations Assessment Horsham District Council July 2021 Horsham Local Plan Habitats Regulations Assessment Quality information Prepared by Checked by Verified by Approved by Damiano Weitowitz James Riley Max Wade James Riley Consultant Ecologist Technical Director Technical Director Technical Director Isla Hoffmann Heap Senior Ecologist Revision History Revision Revision date Details Authorized Name Position 0 13/10/20 Emerging draft JR James Riley Technical to inform plan Director development 1 18/12/20 Updated to JR James Riley Technical assess Director Regulation 19 LP. 2 15/01/2021 Update JR James Riley Technical following client Director comments 3 30/06/21 Further update JR James Riley Technical Director Distribution List # Hard Copies PDF Required Association / Company Name Prepared for: Horsham District Council AECOM Horsham Local Plan Habitats Regulations Assessment Prepared for: Horsham District Council Prepared by: AECOM Limited Midpoint, Alencon Link Basingstoke Hampshire RG21 7PP United Kingdom T: +44(0)1256 310200 aecom.com © 2021 AECOM Limited. All Rights Reserved. This document has been prepared by AECOM Limited (“AECOM”) for sole use of our client (the “Client”) in accordance with generally accepted consultancy principles, the budget for fees and the terms of reference agreed between AECOM and the Client. Any information provided by third parties and referred to herein has not been checked or verified by AECOM, unless otherwise expressly stated in the document. No third party may rely upon this document without the prior and express written agreement of AECOM. Prepared for: Horsham District Council AECOM Horsham Local Plan Habitats Regulations Assessment Table of Contents Executive Summary......................................................................... 7 1. Background........................................................................... 14 Introduction .............................................................................................................. 14 Legislative Context................................................................................................... 14 Scope of the Project................................................................................................. 15 The Layout of this Report ......................................................................................... 16 Quality Assurance .................................................................................................... 16 2. Methodology ......................................................................... 17 Introduction .............................................................................................................. 17 Description of HRA Tasks......................................................................................... 17 HRA Task 1 – Likely Significant Effects (LSE).......................................................... 17 HRA Task 2 – Appropriate Assessment (AA)............................................................ 18 HRA Task 3 – Avoidance and Mitigation................................................................... 18 Geographical Scope of the HRA .............................................................................. 19 3. Relevant Impact Pathways.................................................... 20 Background to Recreational Pressure...................................................................... 20 Background to Water Quality.................................................................................... 23 Background to Water Quantity, Level and Flow........................................................ 24 Background to Loss of Functionally Linked Habitat.................................................. 25 Arun Valley SPA and Ramsar................................................................................... 25 The Mens SAC and Ebernoe Common SAC............................................................ 26 Background to Atmospheric Pollution....................................................................... 27 4. Screening for Likely Significant Effects (LSEs) ..................... 32 Recreational Pressure.............................................................................................. 32 Arun Valley SPA/Ramsar site ................................................................................... 32 Duncton to Bignor Escarpment SAC ........................................................................ 33 Water Quality............................................................................................................ 33 Arun Valley SAC/SPA/Ramsar ................................................................................. 33 Water Quantity, Level and Flow................................................................................ 35 Arun Valley SAC / SPA / Ramsar.............................................................................. 35 Loss of Functionally Linked Habitat.......................................................................... 37 Arun Valley SPA / Ramsar........................................................................................ 37 The Mens SAC and Ebernoe Common SAC............................................................ 38 Atmospheric Pollution............................................................................................... 40 The Mens SAC......................................................................................................... 40 Ebernoe Common SAC............................................................................................ 41 Ashdown Forest SAC............................................................................................... 41 Duncton to Bignor Escarpment SAC ........................................................................ 43 In-Combination Assessment..................................................................................... 43 5. Conclusion of Likely Significant Effects Test ......................... 45 6. Appropriate Assessment ....................................................... 47 Water Quantity, Level and Flow................................................................................ 47 Prepared for: Horsham District Council AECOM Horsham Local Plan Habitats Regulations Assessment Arun Valley SPA / Ramsar Site................................................................................. 47 Policy........................................................................................................................ 48 Partnership Approaches........................................................................................... 48 Conclusion ............................................................................................................... 50 Loss of Functionally Linked Habitat.......................................................................... 50 Arun Valley SPA / Ramsar Site................................................................................. 50 Recommendations: .................................................................................................. 52 The Mens SAC and Ebernoe Common SAC............................................................ 53 Recommendations: .................................................................................................. 54 Atmospheric Pollution............................................................................................... 55 The Mens SAC......................................................................................................... 55 Assessment ‘Alone’.................................................................................................. 56 Nutrient Nitrogen ...................................................................................................... 56 Ammonia .................................................................................................................. 57 Recommendations ................................................................................................... 59 7. Conclusions and a Summary of Recommendations and Considerations............................................................................... 62 Conclusions.............................................................................................................. 62 Recommendations and Considerations.................................................................... 63 Water Quantity, Level and Flow: Arun Valley SPA/ Ramsar site ............................... 63 Policy........................................................................................................................ 63 Partnership Approaches........................................................................................... 63 Relationships............................................................................................................ 64 Loss of Functionally Linked Land ............................................................................. 65 Arun valley SPA/ Ramsar site................................................................................... 65 The Mens SAC and Ebernoe Common.................................................................... 66 Atmospheric Pollution: The Mens SAC .................................................................... 67 Appendix A European Sites Relevant to the Local Plan ................ 70 Appendix B LSEs Screening Table of