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为研究三峡建坝后长江中下游水位变化对江苏江滩钉螺分布与血吸虫病传播的影响，通过对长江江苏段６５５块沿江历史有螺滩近年滩情、螺情和病情资料及建坝前后水位变化预测资料的收集与分析，推算出江苏省受建坝后水位变化影响的江滩为６０７４．６０９８万ｍ２，占江滩总面积的３５．８０％；２～４月份水位升高，有２５７４．０２３１万ｍ２滩块提前受淹，其中包括１１０．３８８５万ｍ２有螺滩；１０～１１月份水位降低，使得３５００．５８６９万ｍ２滩块提前退水，其中包括５４８．７４０８万ｍ２有螺滩和９１．７７９２万ｍ２阳性钉螺滩。
In order to study the influence of the water level changes in the middle and lower reaches of the Yangtze River on the distribution of snails and the spread of schistosomiasis in the river banks of the Yangtze River after the Three Gorges Dam construction, According to the collection and analysis of change forecast data, it is estimated that the river bank affected by the change of water level after the dam construction in Jiangsu Province is 60,746,098 m2, accounting for 35.88% of the total area of the river beach. The water level increased from February to April with 2574 .02310000 m2 beach block flooded in advance, including 1,103,885 m2 mulled beach; 10 to November the water level decreased, making 3500,586,900 m2 beach block early retreat, including 5,487,480 m2 have a spiral beach And 917,792 m2 of positive snails.