鲂胚胎的发育

太湖湖区暴雨径流携带有大量的泥沙和土壤有机物质，对河湖水质造成污染，为了定量分析有机污染对太湖水体的影响，分水田和旱地两种土地利用条件，采用数学模型模拟了湖区丰。平，枯典型年的产流，土壤侵蚀和有机物流失过程及年总量。结果表明，湖区土壤侵蚀量和有机物流失量随地表排水强度的增加呈指数形式增大，尤其是每年暴雨期，湖区地表排水中有机物含量显著增大，建议在太湖流域水质规划和治理中加以重视并采取必要防治措施。

Embryonic Development of Megalobrama skoikovii

A great amount of sediment and organic matter are involved in storm runoff from area around Taihu Lake, which deteoriates the water quality of river and lake. In order to analyze the influence of organic pollutants on Taihu Lake water quality quantitatively, a mathematical model is proposed to simulate the loss processes and total amount of runoff, erosion and organic matter in typical years, in which two land use conditions of paddy field and dry land are considered. The result shows that the amounts of soil erosion and organic matter loss increase with surface drainage intensity exponentially, and organic matter content in surface runoff increases obviously during storm period. The problem must be highly thought of and some measures reducing the organic pollution should be taken in the water quality planning and management of Taihu Lake basin.