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三峡建坝后因水位泥沙的变化将导致坝下河道河势改变，从而影响长江中游江滩钉螺的消长，通过回顾性调查及现场观测，对监利县在建坝后的河道变化及钉螺消长作出前瞻性预测，结果证明地处下荆江的监利县在建坝２０年内，河道以淤积为主，河床将淤高０．２６ｍ，河道则淤窄６７ｍ，从而使江滩面积较建坝前增加 ９．０４ ｋｍ２，这有可能成为新的钉螺孳生地，为此提出以截弯取直的水利工程和大坝的适时调度，以及江滩综合治理等防治对策，以防止因建坝带来血吸虫病扩散的不良后果。
After the Three Gorges Dam construction, the change of sediment will lead to the change of river regime in the lower reaches of the dam, thus affecting the growth and decline of Oncomelania snail in the middle reaches of the Yangtze River. By retrospective survey and field observation, Made a forward-looking forecast, the results prove Jiangying County, located in the next Jingjiang within 20 years of dam construction, the river siltation, the riverbed siltation will be 0.26m, the river siltation 67m, so that the river beach area increased before the dam 9.04 km2, which is likely to become a new snail breeding place. Therefore, the paper puts forward the timely control of water conservancy projects and dams with straightening and straightening, as well as the prevention and control measures such as comprehensive treatment of river banks to prevent the schistosome Adverse consequences of disease spread.