An evidence base for setting flow targets to protect river habitat (NERR035)

This document has been produced to underpin decisions about defining appropriate environmental targets to control adverse effects of anthropogenic flow modifications on the characteristic flora and fauna of UK rivers. Whilst its primary aim is to underpin the review of UK Common Standards targets set for rivers with special wildlife designations for their river habitat, the evidence contained within it is also relevant to the control of flow-related impacts on river ecology under the Water Framework Directive and the UK Biodiversity Action Plan (BAP).