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目的了解南水北调东线取水口抽调江水时钉螺能否进入输水河道孳生扩散。方法对泵站前水源河道、泵站拦污栅、泵站消力池滩地和渠首输水河道进行钉螺分布调查,采用打捞的方法检测水源河道漂浮物携带钉螺情况,结合水工建筑功能、调水量及有关河道水位资料,对钉螺通过泵站扩散可能性进行分析研究。结果江都泵站前水源河道查出钉螺面积185.28hm2,水源河道漂浮物调查发现钉螺主要在汛期吸附于漂浮物漂流扩散;泵站前拦污栅及泵站出水口消力池滩地及泵站后渠首输水河道均未发现钉螺。结论南水北调东线调水泵站水闸、拦污栅、水泵、消力池等水工建筑物具有阻挡、沉淀钉螺的作用,泵站消力池及输水河道因水体大,常年保持高水位运行,不适宜钉螺孳生。
Objective To understand whether the oncomelania can dive into the waterway when pumping water from the east route of South-to-North Water Diversion Project. Methods Snail distribution investigation was carried out on waterway in front of pump station, trash rack at pumping station, beach bottom of shoal pool in pumping station and water conveyance channel of canal head. Survival method was used to detect snails carried by floating objects in waterway of river. Combined with hydraulic construction function, Water diversion volume and river water level information on the snail through the pump station to analyze the possibility of proliferation. Results The snail snail area of 185.28hm2 was found in the waterway of Jiangdu pumping station. The investigation of snorkels in the waterway of the river found that snails were mainly drifted and drifted to the floating objects during the flood season. After the trash rack at the pumping station and the drainage pool at the pumping station and the pumping station There was no snail found in the canal waterway. Conclusion The hydraulic structures such as sluices, trash rack, water pump and stilling pool in the water diversion pumping station of the Eastern Route of South-to-North Water Diversion Project have the function of blocking and settling snails. Due to the large water body and the large water level in the pumping station and the waterway, Not suitable for snail breeding.