We are developing this guide, together with supporting tools for in-channel structures, to provide much needed updated advice on choosing appropriate passage and deterrent measures. It builds on a detailed whole-life costing study we completed and has an inbuilt cost benefit component.
This project synthesises existing research, guidance and practical experience to help the planning and appraisal, design, construction and maintenance of passages as well as deterrent measures at structures such as pumping stations, weirs, locks, sluices and tidal outfalls. Many of the solutions outlined, such as weir removal, are classically considered to be river restoration techniques.
Production of the guide is being directed by a project advisory panel comprising end-user
representatives from the Environment Agency, Natural England and Natural Resources Wales,
as well as internal drainage boards and lead local authorities. The guide and decision-support tool (DST) are to facilitate the appropriate design and delivery of passage solutions for new builds and retrofitting solutions. The DST has been designed to assist with optioneering, informing the priority of implementing fish passage at a site, and taking practitioners through the complex statutory requirements.
The project team recently completed a literature review and approximately 40 site visits at a range of in-channel structures. This has been complemented by an extended visit to the Netherlands where the project team visited a further 10 sites and witnessed first hand some of Dutch innovations.
Key to this project has been encouraging partnership working through gaining knowledge on design solutions from scientists and suppliers as well as meeting with practitioners on site and those that have built solutions.