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This paper evaluates eutrophication in the Dianshan Lake, which is a major source of drinking water for Shanghai, China. The nutrient status shows that Dianshan Lake is progressively approaching an eutrophication stage, and identifies phosphorus as the limiting nutrient controlling the eutrophication process in the lake. Stream water is the single most important source of nutrients loaded into the lake. Despite the high nutrient levels there is no severe deterioration of water quality in the lake. This 'self-purification' tendency is the result of short water residence time, shallow water depth, and human economic activities.
The Geographical Journal © 1991 The Royal Geographical Society (with the Institute of British Geographers)