Browsing by Author "Welcomme, R. L."

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River Fisheries in Africa: Their Relationship to Flow Regimes
(2003) Welcomme, R. L.
"River fisheries in Africa are important because of their contribution of animal protein to human diets. Such fisheries are highly dependent on hydrological regimes and show considerable year-to-year variation in response to natural climatic events. River flow regimes are being increasingly altered by withdrawals by man, principally for agriculture. The modification of hydrological regimes is leading to diminishing catches of fish and changes in the number and size of the species caught. Given that the trend to remove water from rivers for agriculture and power generation will continue, better appraisals of the impacts of such withdrawals are urgently needed so the policies for water allocation can be better defined. The development of tools to aid in such decision-making is equally important."
Water Requirements of Floodplain Rivers and Fisheries: Existing Decision Support Tools and Pathways for Development
(2007) Arthington, A. H.; Baran, E.; Brown, Cate; Dugan, P.; Halls, A. S.; King, J. M.; Minte-Vera, C. V.; Tharme, Rebecca; Welcomme, R. L.
"Fisheries are some of the most valuable natural resources that depend upon natural regimes of river flow for their productivity and full development benefits. Managing rivers to sustain these benefits requires that environmental flow requirements of river fisheries be understood and conveyed effectively into decision-making processes at multiple levels within the river basin. The present research report reviews existing environmental flow methodologies and fisheries production models to determine which combination of existing approaches will provide most potential for development of such decision support tools."