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目的探讨武汉市市内大型江滩血防工程灭螺的效果。方法采用表层除障、药物灭螺、滩面平整、表土剥离填埋、沟渠挖新填旧等工程措施对汉口江滩进行血防整治,提出工程措施的相应技术参数并比较工程整治前后的螺情变化。结果汉口江滩工程整治总长度为6 015 m,整治面积87.21 hm2,其中表土填埋17.44 hm2,表土覆盖52.08 hm2,开挖新沟23条。新沟的平均长度、沟顶宽、沟深、高程差、边坡比及沟底坡的平均数值均有提高,沟底宽度和沟底高程平均数值有所下降。江滩滩面形成了内高外低(堤高江低)的坡度,滩面未再发现钉螺孳生。结论工程灭螺后,江滩钉螺孳生环境得到了彻底改变,但后期仍需加强螺情监测和工程管理。
Objective To explore the effect of snail killing in the large river beach in Wuhan. Methods The measures of blood-remediation of Hankou River beach were carried out with such measures as surface demarcation, drug snail killing, flat beach surface, topsoil stripping and landfill digging, filling of ditches with new fillings, etc. The corresponding technical parameters of engineering measures were put forward and the spirals before and after remediation were compared Variety. Results The total length of Hankou River Beach renovation project was 6 015 m, and the remediation area was 87.21 hm2, of which 17.44 hm2 was surface soil and 52.08 hm2 topsoil. There were 23 new ditches excavated. The average length of new ditch, ditch width, ditch depth, elevation difference, slope ratio and average ditch slope are all increased, and the average value of ditch width and ditch elevation is decreased. The beach surface formed a slope of inner high and low outer (high embankment and low river), and no snail breeding was found on the beach surface. Conclusion After the project snail snail, the snail breeding environment has been completely changed, but the latter still need to strengthen the snail monitoring and project management.