Affiliation: | Centre for Ecology and Hydrology (CEH), Wallingford, Oxon, U.K.; Department of Civil Engineering, Aalborg University, Aalborg, Denmark; Environment Agency of England and Wales, Spalding, U.K.; Independent Consultant, Sheffield, U.K.; Environment Agency of England and Wales, Exeter, U.K.; Aarhus University, National Environmental Research Institute (NERI), Freshwater Ecology, Silkeborg, Denmark |