嘉鱼县双益闸是我省涵闸扩散钉螺最严重的涵闸之一。为杜绝其继续扩散钉螺，我们根据实验室钉螺动水沉降及运动研究的结果，在双益问外增设了中层取水防螺设施。在２年的灌溉运行期间，通过对该设施范围内开展查螺、捞螺和拦螺调查，均未发现钉螺，初步证实具有较好的防止涵闸扩散钉螺的作用和效果。 Jiayi County Shuangyi Brakes is one of the most serious culverts in the province. In order to eliminate its continued proliferation of snails, according to the laboratory snail water sedimentation and movement of the results of the study, in addition to double-Yi asked to add a middle-water intake screw facilities. During the two years of irrigation operation, no snails were found through surveying, snailing and snagging surveys within the scope of the facility, which initially proved to have a good effect and effect of preventing the snail from spreading.