鉴江干流南盛拦河坝库区水葫芦生长成因及治理建议

Growth factors and effective control suggestions of water hyacinth in Nansheng dam of Jianjiang river mains stream reservoir area

每年春季,鉴江干流南盛拦河坝库区都会全面爆发水葫芦泛滥生长的现象,给当地生产生活带来极大影响。本文通过对全面爆发水葫芦泛滥的成因进行调查分析发现,鉴江干流春季来水流量偏低,加上南盛工业引水渠高占比引流,导致库区流速变缓,再配以适当的气温+水域的富营养化综合作用所致。为了解决南盛拦河坝库区水葫芦泛滥问题,根据目前治理措施和南盛断面实际情况,提出适当开闸泄洪、“人工+生物治理模式”,再配以围网或漂浮物围蔽形式的治理措施,以期达到最优的治理效果。

Every spring,the phenomenon of water hyacinth overflowing and growing in Nansheng dam reservoir area of Jianjiang River has brought great impacts on local production and life.In this paper,through the investigation and analysis of the causes of full outbreak of water hyacinth,it is found that the low water inflow in spring,coupled with the high proportion of Nansheng industrial diversion canal,leads to the slowing of the flow velocity combined with the effects of temperature and water eutrophication in the reservoir area.According to the current control measures and the actual situation of Nansheng section,opening of the sluice gate and the mode of“artificial+biological control”are put forward,together with treatment measures in the form of purse seine or floating object enclosure to achieve the best treatment effect.