三峡建坝后社会经济变动对库区湖北段血吸虫病传播危险影响的研究——Ⅰ.对钉螺孳生的影响

Study on the Effects of Soial and Economic Changes on the Spreading of Schistosomiasis in Hubei area of the Reservoir After Construction of Three Gorge Dams

为探索三峡建坝后,社会经济变动对钉螺草生地形成的影响.采用收集资料,类比分析的方法.结果表明,三峡建坝后,库区湖北段移民环境容量降低,如不采取措施,将可能造成水土流失,导致长江干流和支流来沙量增加.加之建坝后流速变缓,泥沙将发生淤积,可形成洲滩和江滩,植被生长,将可能产生钉螺赖以生存的生态环境.文章还对防制措施进行了探讨.

To investigate the effects of social and economic vicissitudes. On forming breeding places of oncomelania after Three Gorge dam is built, data concerned these effects were collected and were analysed comparatively. The results indicate that the volume of immigrant environment was decreased in Hubei area of the reservoir after dams have been constructed. If no control measurements are taken, it might cause the loss of water and surface soil. So as to increase the amount of sands in main streams and tributaries of Yangzhi River. Moreover, water currents become slower after completion of dams, sands and snuchly in currents are easy sedimentary to form the marsh lands would produce the ecological environment on which snails need to survive. Control measurements are also discussed in this paper.