江门恩平朗底水河流健康评价

Health Assessment of Langdi River in Enping, Jiangmen

河流健康评价对河流管理、保护、生态修复以及对社会可持续发展具有重要意义,文章依照水利部及广东省相关河湖健康评价技术导则,从“盆”、“水”、生物、社会服务4个准则层对江门恩平朗底水河流生态系统健康进行评价。结果显示,朗底水的河流健康总得分76.97,根据评定标准,处于健康状态。其中,“盆”和“社会服务功能”准则层非常健康,“水”准则层亚健康,“生物”准则层处于劣态。在评价指标中,得分高于80分的指标有防洪达标率、供水水量保证程度、岸线自然状况、违规开发利用水域岸线程度、水体自净能力等。朗底水生态状况严峻,鱼类存在大量外来物种,大型底栖无脊椎动物较少。朗底水社会服务功能可以继续保持,生物状态是短板,需要加强水环境保护、开展生态修复等各项工作,继续维持河流健康生命。

River health assessment is of great significance for river management,protection,ecological restoration,and sustainable social development.In accordance with the relevant technical guidelines for river and lake health assessment by the Ministry of Water Resources and Guangdong Province,this article evaluates the health of the river ecosystem in Langdi River in Enping Jiangmen from the four criteria of“basin”,“water”,biology,and social services.The results show that the total health score of Langdi River is 76.97,which is in a healthy state according to the evaluation criteria.Among them,the“basin”and“social service function”criterion layers are very healthy,the“water”criterion layer is sub healthy,and the“biology”criterion layer is in a poor state.In the evaluation indicators,indicators with scores higher than 80 include flood control compliance rate,water supply guarantee degree,natural condition of the shoreline,degree of illegal development and utilization of water shoreline,and water self purification capacity.The ecological situation of Langdi River is severe,with a large number of alien species present in fish,and the biological integrity indicators of large benthic invertebrates are still acceptable.The social service function of Langdi Water can continue to be maintained,but its biological state is a weakness.It is necessary to strengthen water environment protection,carry out ecological restoration and other work,and continue to maintain the healthy life of the river.