基于水文过程的南京市城南河流域水生态系统修复方法

Methods of Water Ecosystem Restoration for Chengnan River Basin in Nanjing Based on Hydrology Process

为积极响应国家生态文明建设及绿色发展战略要求,明确河湖生态保护与修复思路,以南京市城南河流域为例,针对滨江城市水生态系统现状,开展水生态系统修复方法研究。根据现状调查及水质采样分析结果,发现城南河流域水质污染严重、水体流通性差、生物多样性一般、水生态服务功能受限等问题,制定以控源截污、LID布设、水系连通等措施为主要组成的水质提升方案,因地制宜完善水生态修复方案。并构建MIKE11水量水质耦合模型,借助ECOLab模块模拟方案实施前后流域内各河道水质变化过程,预测评价城南河流域水生态修复效果。根据模拟结果,水生态修复方案的实施使流域水环境得到较大改善,对流域水生态修复效果总体良好。

In order to respond positively to the national ecological civilization construction and green development strategy,research on the methods of water ecosystem restoration is carried out by taking the Chengnan river basin in Nanjing City as an example.Based on the survey of the current situation and the analysis of water quality,the problems of serious water pollution,poor water flow,general biodiversity,and limited water ecological service functions in the Chengnan river basin were found.A water quality improvement plan consisting mainly of measures to control source pollution interception,LID laying,and water system connectivity has been formulated,and ecological water replenishment has been taken as a supplementary measure to improve the water ecological restoration plan.The water yield and water quality coupling model based MIKE11 is constructed.The water quality change process of each river channel before and after the implementation of the ECOLab module simulation scheme is used to predict and evaluate the effect of water ecological restoration in the Chengnan river basin.According to the simulation results,the implementation of the water ecological restoration program has greatly improved the water environment of the basin,and it has a good effect on the water ecological restoration of the basin.