The impact assessment (IA) for the updated river basin management plans was built from multiple data sources and is based on many assumptions.
The NASS (National Appraisal Summary Spreadsheet) contains a summary of the costs and the estimated benefits of measures assessed in catchment economic appraisals, which are considered to be needed to achieve water body objectives by 2027 and beyond. Costs are presented at measure level, by appraisal catchment. Estimated benefits are presented at appraisal catchment level.
It contains data for all water bodies in England. Attribution statement: © Environment Agency copyright and/or database right 2016. All rights reserved.