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River quality & fishery status: effects of changes in land use & other environmental factors (COMPLETED 3/93) - AE0404

Description
R&D Summary Objectives:- Determine whether changing land use practices and other environmental factors have effects on river quality and associated salmonid fish populations in the Torridge catchment area. Produce recommendations and guidelines for the future management of river quality and salmonid fisheries within the catchment. Key customer purpose:- Provide a better understanding of the impact of land use and other environmental factors on river ecosystems to form the basis for future policy on pollution control and water quality in other riverine systems. Circumstancial evidence points to changes in land use as being a major cause of change and in some cases ofdeterioraton in river quality in certain parts of the UK. However current understanding of the impact of various land uses and other environmental factors on river ecosystems and in particular fisheries is generaly poor. Scientific investigation of the relationship between land use change and the status of aquatic communities and fisheries is therefore urgently required to provide the basis for effective management of pollution control and water quality. It is proposed that a study should be carried out in the torridge catchment in north Devon. A significant decrease in rod catches of salmon and trout has been reported within th catchment over the last few years along with a general decline in river quality. As this is predominantly a rural catchment concern has been voiced over the possible causal link between recent declining salmonid fish stocks. Because of other more general environmental changes monitoring with a greater level of accuracy is needed to clarify possible cause and effect relationships. Therefore a more sharply focused study is required than is routinely applied to environmental monitoring. Summary Objectives:- Determine whether changing land use practices and other environmental factors have effects on river quality and associated salmonid fish populations in the Torridge catchment area. Produce recommendations and guidelines for the future management of river quality and salmonid fisheries within the catchment. Key customer purpose:- Provide a better understanding of the impact of land use and other environmental factors on river ecosystems to form the basis for future policy on pollution control and water quality in other riverine systems.
Objective
1. To identify the factors responsible for the observed deterioration in both river quality and associated salmonid fish populations. 2. To determine whether changing land use practices and other environmental factors have effects on river quality and salmonid fisheries in the Torridge catchment and to quantify these effects. 3. To produce recommendations and guidelines for future management of river quality and salmonid fisheries within the catchment.
Time-Scale and Cost
From: 1990

To: 1993

Cost: £494,716
Contractor / Funded Organisations
Water Research Centre
Keywords
              
Fields of Study
Environmental Protection - Marine