钉螺随溃堤洪水扩散规律的实验研究

Experimental Research on Diffusion Law of Oncomelania along with Dam-break Flood

采用模型实验对钉螺随溃堤洪水扩散规律进行了研究。结果表明,钉螺在洪泛区内的分布并不均匀,而是集中分布在溃口附近上游、下游及回流区域。该结论为安全有效的灭螺提供了重要的理论依据。

Moving of oncomelania with dam-break flood is the main cause for spreading schistosomiasis. Therefore, it is most essential and effective to control diffusion of oncomelanias along with dam-break flood for preventing epidemic of schistosomiasis disease. In this paper the experimental research on the diffusion of oncomelania along with dam-break flood is carried out. The result shows that after diffusion along with dam-break flood; oncomelanias do not equally distribute at floodplain areas, but concentractively distributes where flow velocity is small, i.e. in the backflow areas, at boundary place of upper reaches and lower reaches of the breach. Oncomelania＇s diffusion law provides an important theoretic basis for eliminating oncomelanias.