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Lake Qaroun is one of the inland Egyptian lakes. It serves as a source of water for fishery's management and recreational activities. Lake Qaroun becomes a sink for nutrients in incoming drains; as a result, eutrophication is one of the more significant water quality interests in Lake Qaroun. The application of a two-dimensional finite difference homogeneously averaged hydrodynamics model (ONELAY) and a water quality model (EUTRAM) for the study of eutrophication problem in Lake Qaroun in Egypt is presented. The models are first calibrated with field physico-chemical data. The combined models are then used to characterize the variations of eight state variables: chlorophyll-a, organic phosphorus, inorganic phosphorus, organic nitrogen, ammonia nitrogen, nitrite and nitrate nitrogen, carbonaceous biochemical oxygen demand (CBOD), and dissolved oxygen (DO) in the lake. It is shown that the limiting factor for eutrophication in Lake Qaroun is phosphorus. The better control of phosphorus loading into the lake is the crucial step toward improving the water quality of Lake Qaroun.
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Document Type: Research Article

Publication date: 2001-01-01

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