Effect of cutting beach group on Oncomelania hupensis snail control in south of Shaobo Lake, Jiangsu Province

Abstract

Objective To evaluate the effect of Oncomelania hupensis snail control of cutting the beach group in the south of Shaobo Lake.

Methods The general situation of the project of cutting the beach was surveyed, and the snail distribution was surveyed and the results were compared before and after cutting the beach in the beach group.

Results The area of cutting beach was 928.33 hm ², the cubic meter of earthwork was 1 717.00 m ³, the area of dumping ground was 425.76 hm ², the beach surface elevation was 3.2 m after cutting the beach, and the beach surface was fallen to 1.0 m under the ordinary water level. The area with snails was 44.69 hm ² before cutting the beach in 2011 but the area with snails was 1.78 hm ² after cutting the beach in 2018. The area with remaining snails was declined by 96.02% in 2018 as compared with that in 2011, and surviving snails were distributed on the uncut beach face.

Conclusion In Shaobo Lake, the O. hupensis snail breeding environment is eliminated by raising or lowering the beach, so it is an effective measure of snail control in lake regions.

Abstract

[ 摘要] 目的 评价江苏省邵伯湖南端滩群切滩整治工程灭螺效果。 方法 调查了解邵伯湖南端滩群切滩工程概况, 比较切滩工程前后钉螺分布, 分析切滩工程灭螺效果。 结果 江苏省邵伯湖南端滩群切滩面积 928.33 hm ², 切滩土方为1 717.00 m ³, 弃土堆填面积为 425.76 hm ², 切滩高程为 3.2 m, 降滩至常水位下 1.0 m。2011 年切滩工程前有螺面积为44.69 hm ², 2018 年残存钉螺面积为 1.78 hm ², 较 2011 年下降 96.02%, 残存钉螺分布在未切滩面。 结论 江苏省邵伯湖切 滩工程通过“抬洲降滩”消除了原呈“冬陆夏水”的湖滩钉螺孳生环境, 是湖区灭螺的有效手段之一。