1 Introduction

Total Page:16

File Type:pdf, Size:1020Kb

1 Introduction COTSWOLDS GROUNDWATER MODEL DEVELOPMENT – CALL OFF FROM FRAMEWORK REFERENCE 22344 GROUNDWATER RESOURCE MODELLING, GEOLOGICAL INVESTIGATIONS & HYDROGEOLOGY / HYDROLOGY SERVICES INVITATION TO BID BID REFERENCE: 26044 The Environment Agency South East Region Kings Meadow House Kings Meadow Road Reading Berkshire RG1 8DQ PROTECT COMMERCIAL – WHEN COMPLETED This page intentionally left blank. PROTECT COMMERCIAL – WHEN COMPLETED BID REF: 26044 INSTRUCTIONS TO BIDDERS INSTRUCTIONS TO BIDDERS 1 INTRODUCTION You are invited to bid for the undertaking of the Cotswolds Groundwater Model Development within the South East Region of the Environment Agency in accordance with the enclosed documents (‘The Documentation’) comprising: • Instructions to Bidders • Acknowledgement Form • Bid Return Label • Form of Offer • Draft Form of Agreement • The Scope • Contract Data (Parts One & Two) – NEC3 Professional Services Contract (June 2006) • Activity Schedule Some or all of the Documentation may be set out in the form of a draft contract, intended to apply if the Environment Agency were to accept a Bid. Therefore references in the Documentation to “the Consultant” are, for the purposes of this invitation, references to any Bidder who may be awarded a contract. However, neither this Invitation to Bid nor the Documentation constitute an offer by the Environment Agency to enter a contract. The Agency will not accept any liability for costs incurred, or work done, by any Bidder at any time in anticipation of being awarded a contract in relation to any response to this Invitation To Bid. 2 DOCUMENTATION 2.1 Copyright and Confidentiality Unless otherwise indicated, the copyright in all of the Documentation belongs to the Environment Agency, and the Documentation is to be returned to the Agency with your bid. The contents of the Documentation must be held in confidence by you and not disclosed to any third party other than is strictly necessary for the purposes of submitting your bid. You must also ensure that a similar obligation of confidentiality is placed upon any third party to whom you may need to disclose any of the Documentation for the purposes of the bid. 2.2 Accuracy of Documentation You should check the Documentation; should any part be found to be missing or unclear you should immediately contact the Environment Agency at the address given in the covering letter. No liability will be accepted by the Agency for any omission or errors in the Documentation which could have been identified by you. 2.3 Amendments to Documentation Cotswolds Groundwater Model Page 1 of 4 Environment Agency PROTECT COMMERCIAL – WHEN COMPLETED BID REF: 26044 INSTRUCTIONS TO BIDDERS Prior to the date for return of bids, the Agency may clarify, amend or add to the Documentation. A copy of each instruction will be issued by the Agency to every Bidder and shall form part of the Documentation. No amendment shall be made to the Documentation unless it is the subject of an instruction. The Bidder shall promptly acknowledge receipt of such instructions. 3 SCOPE OF SUPPLY The South East Region of the Environment Agency intends to award a single contract for the development of a conceptual and numerical groundwater model simulating groundwater flow covering the outcrop of the Great and Inferior Oolite aquifers, as well as part of the confined aquifer where there are several large public water supplies, that is beneath the Thames Valley. It covers the catchments gaining baseflow from the major aquifers, that is the upper Thames, Churn in the west to the Evenlode and Glyme in the east. Contributions to river flows from the overlying minor aquifers need also to be considered. Along the western boundary the upper Frome catchment should be included as significant quantities of groundwater are captured from the Thames surface water catchment, forming springs along the Frome particularly at Chalford. On completion of the conceptual model the Consultant shall discuss with the Environment Agency their proposals for constructing and testing a historical numerical model. The Agency Project Manager will require agreement on the proposed method for developing and refining the model prior to commencement of a numerical model. It is at the Agency’s discretion whether to proceed beyond the conceptual phase. 4 BID RESPONSE 4.1 Structure Your bid response (3 copies) should contain the information called for below: • your company’s full name and address, (with whom a resulting contract may be placed) to be shown in the ‘Contract Data - Part Two’, together with the address of your registered office and company registration number; • a statement of compliance with the provisions and requirements contained in the ‘Contract Data - Part One’; • the address of the office location(s) from which the services are to be provided, including details of any proposed subconsultants; • firm prices in sterling and completion dates for the services to be shown in section 1 of the ‘Activity Schedule’; • fixed staff rates, the names of the key persons, their jobs and responsibilities to be shown in sections 2 & 4 of the ‘Activity Schedule’; • fixed expenses to be shown in sections 3 & 4 of the ‘Activity Schedule’; • Curricula Vitae detailing qualifications and experience of the key persons nominated to perform the services; Cotswolds Groundwater Model Page 2 of 4 Environment Agency PROTECT COMMERCIAL – WHEN COMPLETED BID REF: 26044 INSTRUCTIONS TO BIDDERS • a statement of compliance with the provisions and requirements contained in the ‘Scope’ showing details of any partial or non compliances; • a programme detailing the timescales and sequence for performing the services in according with the completion dates shown in the ‘Activity Schedule’; • a Method Statement detailing the methodology of meeting the requirements of the ‘Scope’ and managing the contract, including how you propose to allocate adequate resources and appropriate key persons to the specific activities; • a description of any risks and actions to avoid or reduce such risks to be listed in the Risk Register to be notified as an early warning matter; • details of your quality plan / quality control procedures relevant to supplying the services; • details of any specific Health & Safety risks perceived by yourselves in performing the services required and how you will mitigate them; • the attached ‘Form of Offer’ statement completed, signed and dated. 4.2 External Reference Material Where any external reference material, such as brochures, specifications and system descriptions, is used to support a bid response, any statements within the reference material which may allow change to obligations or reduce liability, such as "specifications subject to change without notice", or other disclaimers will be regarded as void. 4.3 Cross References Where a particular section of the response submitted by a Bidder relates to information given in another section or in external reference material, then the Bidder shall ensure that the response is clearly cross- referenced. 5 ALTERNATIVE OFFERS Alternative offers will only be considered if they constitute a fully priced alternative and are submitted in addition to a Bid complying with the requirements specified in the ITT documents. Alternative offers must contain sufficient supplementary information, drawings and data to permit a complete evaluation to be made. 6 FREEDOM OF INFORMATION ACT The Environment Agency is committed to open government and to meeting its responsibilities under the Freedom of Information Act 2000. Accordingly, all information submitted to us may need to be disclosed by us in response to a request under the Act. We may also decide to include certain information in the publication scheme which we maintain under the Act. If you consider that any of the information included in your bid, or any other information that you have submitted, is commercially sensitive, please identify it and explain (in broad terms) what harm may result from disclosure if a request is received, and the time period applicable to that sensitivity. You should be aware that, even where you have indicated that information is commercially sensitive, we may be required to disclose it under the Act if a request is Cotswolds Groundwater Model Page 3 of 4 Environment Agency PROTECT COMMERCIAL – WHEN COMPLETED BID REF: 26044 INSTRUCTIONS TO BIDDERS received. Please also note that the receipt of any material marked ‘confidential’ or equivalent by the Agency should not be taken to mean that we accept any duty of confidence by virtue of that marking. If a request is received, we may also be required to disclose details of unsuccessful bids. 7 AWARD OF CONTRACTS Award of contracts will be on the basis of the most economically advantageous offer having regard to: Criteria • price • method statement • experience & capability of key persons • resource allocation • programme • quality assurance • health & safety considerations The Agency shall be under no obligation to award a contract for all or any part of the requirement set out in the Invitation to Bid, to any Bidder or at all. Any resultant contract will be made by the Agency issuing an acceptance letter and form of agreement to the successful Bidder. Bidders may be required to answer any Agency queries on their proposal and to attend formal meetings with the Agency during the bid evaluation period. Bids shall be valid for acceptance for a minimum period of 60 days from the date for return of the Bid, and thereafter unless withdrawn in writing. 8 RETURN OF BIDS The Bidder
Recommended publications
  • River Avon (Bristol) – Sommerfords Fishing Association
    River Avon (Bristol) – Sommerfords Fishing Association An advisory visit carried out by the Wild Trout Trust – March 2012 1 1. Introduction This report is the output of a Wild Trout Trust advisory visit undertaken on a stretch of the River Avon on waters controlled by the Sommerfords Fishing Association. The club has approximately 11Km of fishing but the advisory visit was restricted to the top beat, above Kingsmead Mill NGR ST 956844. The request for the visit was made by Mr. Ian Mock, who serves on the club committee and is the club’s Treasurer. The Sommerfords FA manages the Avon as a mixed fishery, where the emphasis is mainly on coarse fishing. The club undertakes some trout stocking on the 1km reach downstream of Kingsmead Mill, with an annual introduction of approximately 300 triploid brown trout. The top beat is not stocked and the members target both wild trout and coarse fish from this section. There is concern that results from the top beat have been in decline in recent years and the club is keen to explore opportunities to improve habitat for flow-loving, gravel spawning fish species. Comments in this report are based on observations on the day of the site visit and discussions with Mr. Mock. Throughout the report, normal convention is followed with respect to bank identification i.e. banks are designated Left Bank (LB) or Right Bank (RB) whilst looking downstream. Sommerfords FA beat above Kingsmead Mill 2 2. Catchment overview The upper Bristol Avon rises east of the town of Chipping Sodbury in South Gloucestershire, just north of the village of Acton Turnville.
    [Show full text]
  • Appendix L1 - Ecological Monitoring Methodologies
    Appendix L1 - Ecological Monitoring Methodologies Macro-invertebrate flow assessment - LIFE A flow diagram showing the steps taken to assess the suitability of the macro-invertebrate community to the flow conditions in the river is shown in Figure L1.1 and described below. Assessment of flow conditions using macro-invertebrates is based on the Lotic-invertebrate Index for Flow Evaluation (LIFE) (Ref. L1). Macro-invertebrates are collected using a standard 3-minute kick sample and sorted following ‘Procedures for Collecting and Analysing Macro-invertebrate Samples’ (BT 001) published by the Environment Agency (Ref. L2). The invertebrate processing was subject to an analytical quality control scheme as detailed in ‘Procedure for quality assurance for RIVPACS compatible macro-invertebrate samples analysed to the taxonomic level needed for the BMWP-score’. BT 003 (Ref. L3). Each scoring taxa or species is allocated a LIFE score that is dependent on its flow/current velocity requirements and the number of individuals present. In most samples from the Malmesbury Avon there are 20 to 30 taxa present in a sample. The score for each taxa is added together and the total is divided by the number of scoring taxa/species to give the LIFE score for the sample. The theoretical range for LIFE scores is 1-12 although scores typically range between 8 for high gradient headwaters and 6 for slower flowing impounded stretches of water. Ten sites were selected by the Environment Agency on the Sherston and Tetbury arms and main Avon below Malmesbury and have been sampled in 2001, 2002 and 2004. Samples were taken in spring, summer and autumn wherever resources permitted.
    [Show full text]
  • Bristol Avon Consultation Draft
    U E T K f i - £ local environment agency plan BRISTOL AVON CONSULTATION DRAFT E n v ir o n m e n t Ag e n c y MAP 1 Map 1 - Local authority boundaries Map 2 - Exceedences of critical loads of acidity for soils SO 00 SP District Councils Stroud West Wiltshire Modelled Sulphur Cotswold Mendip Deposition for 1995 North Wiltshire Salisbury Kennet South Somerset 10km Thampsriown TETBURY ' s!"' MALMESBURY- uth of the Severn WOOTTON iCREAT SO M ERFO RD ^ # J UDAUNTSEY BUSHTON CHIPPENHAM Exceedence (Kilogramme equivalent of CALNE \ hydrogen ions per hectare per year) Not Exceeded KEYNSHAM BATH BEANACREM 0.0 - 0.2 fMELKSfi! SOUTH WRAXALL 0.2 - 0.5 ,BRADFORD ON AVON DEVIZES Modelled Sulphur 0.5- 1.0 Deposition for 2005 TROWBRIDGE RADSTOCK \ LITTON/ MIDSOMER- ‘vCHEWTON NORTON- ( m e n d ip I C ,J ' FROME: ;----WESTBURY Unitary Authonties Catchment Boundary North Somerset Bath and North East Somerset Settlement Bristol City Council Local Authority © Crown Boundary South Gloucestershire Copyright Source: Critical Loads Mapping and Data Centre, ITE Monks Wood - Data acknowledgement: CMC Soils sub-group, Hull University © Crown Copyright © Crown Copyright ENVIRONMENT AGENCY Map 3 - Bristol Avon Catchment Area © Crown Copyright t Map 4 - Compliance with River Quality Objectives (River Ecosystem Classification 1997) © Crown Copyright MAPS MAP 6 Map 5 - EC Directives Map 6 - STWs Causing or Contributing to Degraded Water Quality SO 00 SP SOOOSP Cause/contribute to May cause/contribute to EC Dangerous Substance AA A▲ monitoring site RQO and LT-RQO RQO and
    [Show full text]
  • Upper Bristol Avon Catchment Management Plan Consultation Report Is the NRA’S Initial Analysis of the Issues Facing the Catchment
    NRA South West 36 8 $ UPPER BRISTOL AVON CATCHMENT MANAGEMENT PLAN CONSULTATION REPORT JU N E 1994 E n v ir o n m e n t Ag e n c y NATIONAL LIBRARY & INFORMATION SERVICE HEAD OFFICE Rio House, Waterside Drive. Aztec West, Almondsbury, Bristol BS32 4UD ENVIRONMENT AGENCY iiiiii iiiii mu i ii hi 0062321 This document is printed on recycled paper YOU R VIEW S The Upper Bristol Avon Catchment Management Plan Consultation Report is the NRA’s initial analysis of the issues facing the catchment. We want to hear your views. * Have we identified all the issues? * Have we identified all the options for solutions? * Have you any comments on the issues and options listed? If so, we would like to hear from you. Comments on the Upper Bristol Avon Catchment Management Consultation Report are best sent in writing and should be received by Tuesday 6 September 1994. To comment, please write to: Alan Turner North Wessex Area Catchment Planner NRA South Western Region Rivers House East Quay Bridgwater Somerset TA6 4YS Tel: Bridgwater (0278) 457333 Ext 4765 THE NATIONAL RIVERS AUTHORITY The NRA’s mission and aims are as follows: "We will protect and improve the water environment by the effective management of water resources and by substantial reductions in pollution. We will aim to provide effective defence for people and property against flooding from rivers and the sea. In discharging our duties we will operate openly and balance the interest of all who benefit from and use rivers, groundwaters, estuaries, and coastal waters. We will be businesslike, efficient and caring towards our employees".
    [Show full text]
  • Draft Topic Paper 12: Infrastructure
    Wiltshire Local Development Framework Working towards a Core Strategy for Wiltshire Draft topic paper 12: Infrastructure Appendix 2 Community Area Infrastructure Profiles Wiltshire Core Strategy Consultation June 2011 Appendix 2: Community area infrastructure profiles (Based on information gathered during the Wiltshire 2026 consultation) The following information has been obtained through discussions and further correspondence with infrastructure service providers during the Wiltshire 2026 public consultation. It is intended to give a picture of the likely infrastructure issues and needs for community areas. Comments relate to the draft strategic site options, which are included at the end of Appendix 2. Further comment will be sought from infrastructure service providers during the preparation of a draft Infrastructure Delivery Plan (IDP), which will be published alongside the submission draft Wiltshire Core Strategy towards the end of 2011. South Wiltshire Community Areas Information on infrastructure requirements for community areas in south Wiltshire has been gathered as part of the preparation for the South Wiltshire Core Strategy, which has been the subject of an Examination in Public. That document, and the associated Topic Paper 17 on Infrastructure, should be referred to, to see what the infrastructure requirements are for those community areas, and can be viewed at: www.wiltshire.gov.uk/southwiltshirecorestrategysubmissiondraft The evidence base for the South Wiltshire Core Strategy, including the associated Topic Paper 17 on
    [Show full text]
  • Heritage Assets in Inland Waters
    Heritage Assets in Inland Waters Antony Firth March 2014 A report for English Heritage Fjordr Ref: 16171 English Heritage Ref: 6670 Fjordr Marine and Historic Environment Consulting Title Heritage Assets in Inland Waters - an appraisal of their significance and protection Fjordr Ref / Version 16171 External Ref(s) EH 6670 Authors Antony Firth Derivation Origination Date 04/09/13 Date of Last Revision 05/03/14 Status / Required Action Draft Circulation EH File Name / Location C:\Users\Antony\AJF - Fjordr\Business\Projects\16171 Inland Waters - Main\Report\Heritage Assets in Inland Waters - Final Report 050314.docx Fjordr Limited. Company No. 07837575 Registered Office: Windover House, St. Ann Street, Salisbury, SP1 2DR Heritage Assets in Inland Waters Fjordr 16171 – March 2014 Contents Acknowledgements.......................................................................................................... iii Executive Summary .........................................................................................................iv 1. Background ............................................................................................................ 1 2. Research Aim and Objectives ................................................................................... 1 3. Project Scope ......................................................................................................... 2 3.1. Study Area................................................................................................... 4 4. Outline of Methods .................................................................................................
    [Show full text]
  • South Gloucestershire Strategic Flood Risk Assessment
    South Gloucestershire Council Strategic Flood Risk Assessment - Level 2 FINAL REPORT December 2011 South Gloucestershire Council Council Offices Badminton Road YATE Gloucestershire BS37 5AF JBA Office Aberdeen House South Road HAYWARDS HEATH West Sussex RH16 4NG JBA Project Manager Alastair Dale BSc PGDip MIAHR Revision History Revision Ref / Amendments Issued to Date Issued Pam Walton (South Gloucestershire V1.0 - First Draft N/A Council) (July '11) Nigel Smith (EA) Pam Walton (South Gloucestershire V1.1 - Updated Updated with initial comments from client Council) Draft and EA Nigel Smith (EA) at meeting dated the 30 August 2011 ( Hard Copy) Updated following meeting on the 30 August 2011, Comments from EA 05/08/2011 and 26/08/2011 V 2.0 Updated Not Issued Comments from SGC 26/08/2011, 02/09/2011 and 07/09/2011 Updated following emails dated Pam Walton (South Gloucestershire 7 September (EA) Council) V3.0 - FINAL 14 September 2011 (SGC) Nigel Smith (EA) DRAFT 23 September (EA) Nigel Hale (South Gloucestershire 28 September (SGC) Council 03 October (SGC) Updated following emails from SGC on the: Pam Walton (South Gloucestershire 27 October, 28 October, 31 October, 4 Council) November, 8 November and the 9 V4.0 FINAL Nigel Smith (EA) November. Nigel Hale (South Gloucestershire And from the EA on the Council 25 October, 4 November Pam Walton (South Gloucestershire Council) Update following emails dated: v5.0 FINAL Nigel Smith (EA) 2/12/2011 (SGC) Nigel Hale (South Gloucestershire Council Pam Walton (South Gloucestershire Council) Update following dated V6.0 FINAL Nigel Smith (EA) 6/12/2011 (SGC) Nigel Hale (South Gloucestershire Council Pam Walton (South Gloucestershire Council) Update following email dated V7.0 Final Nigel Smith (EA) 6 /12/2011 (SGC) Nigel Hale (South Gloucestershire Council 2011s4997 SGC FINAL SFRA Level 2 v7.0.doc i 2011s4997 SGC FINAL SFRA Level 2 v7.0.doc ii Contract This Level 2 Strategic Flood Risk Assessment (SFRA) is commissioned by South Gloucestershire Council.
    [Show full text]
  • Investigation of the Relationship Between the LIFE Index and RIVPACS
    Investigation of the relationship between the LIFE index and RIVPACS Putting LIFE into RIVPACS R&D Technical Report W6-044/TR1 R T Clarke, P D Armitage, D Hornby, P Scarlett & J Davy-Bowker CEH Dorset Publishing Organisation Environment Agency, Rio House, Waterside Drive, Aztec West, Almondsbury, Bristol BS32 4UD Tel: 01454 624400 Fax: 01454 624409 Website: www.environment-agency.gov.uk © Environment Agency 2003 June 2003 ISBN : 1844321495 All rights reserved. No part of this document may be produced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise without the prior permission of the Environment Agency. The views expressed in this document are not necessarily those of the Environment Agency. Its officers, servants or agents accept no liability whatsoever for any loss or damage arising from the interpretation or use of the information, or reliance upon the views contained herein. Dissemination status Internal: Released to Regions External: Public Domain Statement of Use This report examines the potential for RIVPACS to enable standardisation of LIFE scores between sites in order to then estimate the relative severity of flow-related stress at a site. Keywords: LIFE; RIVPACS; Biological monitoring; macroinvertebrates; low flows; slow flows; ecological stress; Catchment Abstraction Management Strategies (CAMS); Resource Assessment and Management (RAM) Framework Research Contractor This document was produced under R&D Project W6-044 by : CEH Dorset, Winfrith Technology Centre, Winfrith Newburgh, DORCHESTER, Dorset DT2 8ZD Tel : 01305 213500 Fax : 01305 213600 Environment Agency Project Manager The Environment Agency’s Project Manager for R&D Project W6-044 was Doug Wilson, Head Office, Bristol.
    [Show full text]
  • Waterspace Study September 2017
    WATERSPACE STUDY SEPTEMBER 2017 This Study has been prepared by the WaterSpace Partnership THANK YOU For more information on the WaterSpace Study The Study partners would like to thank all those please contact the Environment & Design team at who have taken part in the preparation of this environment&[email protected] Study over the last two years, including: the Strategic This document can also be viewed on our website River Group, the WaterSpace Partnership Steering www.waterspacebath.org.uk. WaterSpace Study Group, the River Avon Consultative Committee, can be made available in a range of languages, large the River Safety Group, and outreach officers from print, Braille, on tape, electronic and accessible charity Julian House. formats by contacting the Council on: Thanks to all of those who have engaged with the Telephone: 01225 477548 project, attending and running waterways related Fax: 01225 394199 events, putting forward project ideas, providing photos and reviewing drafts. Design by SteersMcgillanEves www.steersmcgillaneves.co.uk We look forward to working with partners and local people to deliver and develop further the aspirations in this study. This Study has been produced by Bath & North East Somerset Council’s Environment & Design Team working together with Atkins. This project has been recognised for its contribution to planning for the Natural Environment: CONTENTS FOREWORDS WATERSPACE STUDY BRISTOL AVON PROJECTS & 04 EVIDENCE AND CATCHMENT PROJECT IDEAS ANALYSIS AND FLOOD 69 11 MANAGEMENT PROJECTS & PROJECT QUICK GUIDE
    [Show full text]
  • Environment Agency South West Region
    Environment Agency South West Region INFORMATION SERVICE SOUTH WEST REGION Manley House. Kestrel Way. Exeter EX2 7LQ E n v i r o n m e n t A g e n c y Richard Horrocks Regional Flood Defence Manager Environment Agency South West Region Manley House Kestrel Way Exeter EX2 7LQ Tel 01392 444000 Fax 01392 444238 ISBN 185705 573 x ©Environment Agency All rights reserved. No part of this document may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior permission of the Environment Agency. Cover: River Taw at Umberleigh HO-4/01-150-A Printed on recycled paper October/November 2000 Flood Event Report EA South West CONTENTS EXECUTIVE SUMMARY....................................................................................... ...1 1.0 INTRODUCTION 1.1 Event Management............................................................... ................................... 2 1.2 Flood Forecasting..................................................................................................... 2 1.3 Flood Warning.......................................................................................................... 2 1.4 Event Impact............................................................................................................. 2 1.5 Emergency Response................................................................................................ 3 1.6 Public Relations......................................................
    [Show full text]
  • The Prevalence of Aphanomyces Astaci in Invasive Signal Crayfish
    1 The prevalence of Aphanomyces astaci in invasive signal crayfish from the UK and implications for native crayfish conservation J. JAMES1*†, S. NUTBEAM-TUFFS2,3†, J. CABLE1,A.MRUGAŁA4, N. VIÑUELA-RODRIGUEZ4,A.PETRUSEK4 and B. OIDTMANN3 1 School of Biosciences, Cardiff University, Cardiff CF10 3AX, UK 2 The Roslin Institute, University of Edinburgh, Easter Bush, Midlothian EH25 9RG, UK 3 Centre for Environment, Fisheries and Aquaculture Science (Cefas), The Nothe, Weymouth, Dorset DT4 8UB, UK 4 Department of Ecology, Faculty of Science, Charles University, Viničná 7, CZ-12844 Prague 2, Czech Republic (Received 26 May 2016; revised 27 September 2016; accepted 19 October 2016) SUMMARY The crayfish plague agent, Aphanomyces astaci, has spread throughout Europe, causing a significant decline in native European crayfish. The introduction and dissemination of this pathogen is attributed to the spread of invasive North American crayfish, which can act as carriers for A. astaci. As native European crayfish often succumb to infection with A. astaci, determining the prevalence of this pathogen in non-native crayfish is vital to prioritize native crayfish popula- tions for managed translocation. In the current study, 23 populations of invasive signal crayfish (Pacifastacus leniusculus) from the UK were tested for A. astaci presence using quantitative PCR. Altogether, 13 out of 23 (56·5%) populations were found to be infected, and pathogen prevalence within infected sites varied from 3 to 80%. Microsatellite pathogen geno- typing revealed that at least one UK signal crayfish population was infected with the A. astaci genotype group B, known to include virulent strains. Based on recent crayfish distribution records and the average rate of signal crayfish population dispersal, we identified one native white-clawed crayfish (Austropotamobius pallipes) population predicted to come into contact with infected signal crayfish within 5 years.
    [Show full text]
  • Lower Bristol Avon Catchment Management Plan Consultation Report
    NRA South West 24 LOWER BRISTOL AVON CATCHMENT MANAGEMENT PLAN CONSULTATION REPORT NRA National Rivers Authority South Western Region March 1995 E n v ir o n m e n t Ag e n c y NATIONAL LIBRARY & INFORMATION SERVICE HEAD OFFICE Rio House, Waterside Drive, Aztec West. Almondsbury, Bristol BS32 4UD NRA Copyright Waiver This report is intended to be used widely and may be quoted, copied or reproduced in any way, provided that the extracts are not quoted out of context and that due acknowledgement is given to the National Rivers Authority. Published March 1995 ENVIRONMENT AGENCY 099886 FOREWORD This is the second Catchment Management Plan Consultation Report produced in North Wessex Area and it covers the Lower Bristol Avon downstream from Avoncliff Weir near Bradford-on-Avon together with all tributaries draining to the Avon below that point. We have dealt with the Avon catchment upstream of Avoncliff Weir in a separate management plan, for which a Consultation Report was published in June 1994 and an Action Plan published in March 1995. This report describes the physical features and factors such as geology and climate, for the Lower Bristol Avon. Importantly, we set out the NRA’s Vision for the catchment. We describe: • the activities in the catchment which affect the water environment and the uses made of water • the NRA’s objectives and targets for the water environment, described under five headings - water quality, water quantity, groundwater protection, physical features and flood defence • the state of the catchment is assessed in relation to the five categories of objectives.
    [Show full text]