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Hydraulic Modelling and Risk Mapping Statement of Requirements and Outline Brief Template Technical Group

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Hydraulic Modelling and Risk Mapping Statement of Requirements and Outline Brief Template Technical Group Hydraulic Modelling and Risk Mapping Statement of Requirements and Outline Brief Template Technical Group www.sfrm.co.uk 1. Introduction Project title Ribble Catchment Model Update and Expansion Project reference tbc Project stage Main Environment Agency Region North West Environment Agency Area n/a Environment Agency Project Manager Mark Franklin Environment Agency Project Executive tbc Project Partner(s) n/a Address Richard Fairclough House, Knutsford Road, Contact details for Environment Agency Latchford, Warrington, Cheshire, WA4 1HT Project Manager Telephone 01925 542958 Email [email protected] 2. Health & Safety and environmental considerations The Environment Agency has a statutory duty to ensure that the employees and consultants it employs are competent in the tasks they perform with regard to health, safety, wellbeing and environmental responsibilities. Compliance with Health and Safety legislation was addressed when the SFRM2 framework was tendered for and general requirements for Health and Safety (such as working hours, site visit risk assessments, etc) are covered by this. 3. Description of requirements Objectives There are 1.825 million properties at high-risk of flooding from rivers and the sea in England and Wales. We need to increase the number of properties that receive and take up our warnings to meet the aims of our corporate strategy The project aims to improve real-time flood forecasting for the Ribble Catchment, specifically the Pendle Water and Calder catchments to support continuing expansion of our Flood Warning Service and to ensure continued delivery of timely and accurate Flood Warnings The approach expected to be taken is to update the modelling, and provide guidance on model performance for Flood Forecasting Duty Officers Key issues and risks include the urban nature and rapid response of the catchment, channel changes and the short data record at key sites Study area Maps showing the geographic location of the study area are included in Appendix A. The project area lies in the Ribble Catchment to the east of Preston The catchment is extensively urbanised with an area of about 330km 2 and several fast response tributaries (Pendle Water, Colne Water, River Brun, Green Brook, River Hyndburn, Sabden Brook). Many sections are culverted or in engineered channels and there are significant areas of floodplain in the lower reaches and in parts of the upper catchment Key urban areas include Burnley, Nelson, Colne and Accrington, with Flood Warning Areas at Whalley, Burnley, Barrowford, Fulledge, Lomeshaye and Padiham, and further Flood Warning Areas planned for Trawden, Colne and Burnley during 2011/12 A number of models exist for the study area, the most applicable are: Pendle Water, Upper Calder and Lower Calder Flood Forecasting Models (River Ribble Flood Forecasting Improvements Project, Atkins, 2006) Burnley, Colne Water, Green Brook, Lower Calder, Pendle Water, Swinden Brook and Trawden Brook Flood Mapping Models (Burnley, Nelson, Colne Area Flood Mapping Update, JBA, 2010) Page 1 of 9 Last updated 31-Mar-11 Hydraulic Modelling and Risk Mapping Statement of Requirements and Outline Brief Template Technical Group www.sfrm.co.uk Modelling reports for PDMs developed at various sites inside and outside of the study area which may be suitable donors Deliverables The draft and final reports of the project must be agreed with the EA PM and should follow the principles of the SFRM performance scope (available from www.sfrm.co.uk .). A detailed list of tasks required is provided in Appendix B. The main deliverable is an updated Flood Forecasting network suitable for configuration into the NFFS and for real-time use To support real-time use of the model the project should deliver (concise) guidance on expected model performance and limitations for inclusion in the NW MFDO manual The final modelling report should be a technical report aimed primarily at Flood Forecasting Technical Specialists Calibration, verification and performance testing should be carried out to understand the model performance with observed flows, observed rainfall, and forecast rainfall With reference to the above statement the consultant should clearly state in their response what capability they have for carrying out this testing, and what access they have to forecast rainfall data for use in this project Offline calibration should be to current NW specification standards and, as such, a general minimum target accuracy of ±150 mm (more accurate where possible) with perfect ‘hindsight’ rainfall inputs are expected at all forecast locations Activities Project management Preparation of outline proposal Fortnightly updates on progress, monthly updates on project progress and spend profile Feed in to survey requirements (survey will be procured and delivered by the Environment Agency) Preparation of suitable inputs for model Review and improvements of existing hydraulic model – due to the urban nature of the catchment a hydrodynamic (HD) rather than flow routing approach is expected for the Pendle Water and Upper Calder models at least. Routing may be considered for the Lower Calder model, however the HD models for this reach are quick to run anyway Agreement of a sensible and consistent naming convention for model nodes Calibration of hydrological and hydraulic models and analysis of data against available information Sensitivity analysis and discussion Production of draft report Quality assurance of all deliverables Assessment of supplier performance measures (SPMs) Production of final report following review of draft report and deliverables by the EA Production of model outputs defined in Appendix B Presentation of final outputs to client audience (tbc) Post project appraisal Data Data available General data available from the Environment Agency (with licence) including topographic survey, LIDAR (from geomatics group website), OS Mastermap and tiles, HiFlows UK, FEH CD- ROM data, etc Page 2 of 9 Last updated 31-Mar-11 Hydraulic Modelling and Risk Mapping Statement of Requirements and Outline Brief Template Technical Group www.sfrm.co.uk Hydrometric data and rating curve reviews – see attached table Rainfall forecasts may be made available by the Environment Agency (with licence) – the consultant should clearly state in their response what access they have to forecast rainfall data for use in this project Data management plan For this project the EA PM will produce the data management plan. Intellectual property There are clauses in the Contract Data Template (Option X9 and Option Clause Z4) related to IPR which help us ensure we manage Intellectual Property properly. Data security The usual data security requirements apply for the project in respect of the handling, storage and transmission of personally or commercially sensitive data. Licensing Any data supplied to the consultant as part of this study will be done so in accordance with Environment Agency policy, and appropriate data licences. Any other data requested by the consultant will be provided and licensed for the duration of the study. Metadata Any new data or information that is created as part of a commission must be submitted to the Environment Agency with associated metadata. 4. Project management Outline budget n/a Outline programme There are a number of key milestones that must be agreed and met, namely: draft PDM parameters and supporting files, draft rating models and reporting, draft river models, draft performance results, draft guidance, draft final report, final report – these should be clearly identified as such in your programme Ideally the project will commence during late April or early May 2011, the estimated duration of commission of the commission is around six months so final delivery is expected during December 2011 Good communication will be key to successfully completing the project. As a minimum, short (less than 10 minutes or a few bullet-points) fortnightly updates by email and/or telephone are expected, along with monthly updates on project progress and spend profile At least 10 working days should be allowed in the programme for the EA to review any draft material Pricing Option - NEC3 Professional Services Contract (PSC) Option A: Priced contract with activity schedule This is the preferred option, alternatives may be considered where there is justification i.e large potential cost savings. Contract strategy Response time for return of initial proposal: two weeks (extra days added as EA PM on leave) Allocation approach: mini-competition Quality: price basis: 50:50 quality : price Consultants being approached: Halcrow, JBA Tender return information All bid information to be returned as password protected electronic submissions via e-mail to mark.franklin@environment–agency.gov.uk and copied in to carol.caddick@environment- agency.gov.uk For technical questions please contact Mark Franklin 01925 542958 (Mark will be on annual leave 1 st -8th April inclusive) Page 3 of 9 Last updated 31-Mar-11 Hydraulic Modelling and Risk Mapping Statement of Requirements and Outline Brief Template Technical Group www.sfrm.co.uk For procurement questions only contact Carol Caddick from the regional procurement team Submissions to be returned by 12 midday on Tuesday 19th April Late or non-compliant submissions may not be considered 5. Consultant’s response The consultant must provide a technical / quality / price proposal (including programme / costs / risks) of a maximum of 3 sides of A4
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