钉螺在动水中运动特性研究

Study on the Motion Behavio of Oncomelania in Water Flow

通过试验，研究了钉螺在动水中爬行运动和钉螺在动水中的起动流速，推导了钉螺在开厣状态下起动流速公式；还根据试验结果描述了不同流速区段钉螺运动特性，分析了钉螺在渠系中扩散方式，从而为防止钉螺扩散提供了理论依据。

In order to prevent the oncomelania's diffusion along irrigation channels, it is necessary to study the motion behavio of oncomelania in water flow. The threshold velocity and creep of oncomelania in water flow have been studied, and the fomulations on open operculum oncomelania have been de rived. The motion behavio of oncomelania of different velocity in water flow have been described ac cording to the test results, as well as, the diffusion type of oncomelania along irrigation channels have been discussed. As a result, the theoritical basis for preventing oncomelania diffusion have been got.