摘要
合流制溢流与降雨初期的径流污染日益成为影响城市河流、湖泊等天然水体水质的主要因素.调蓄池可以将降雨径流截流并滞后输送至污水处理厂,这是一种控制城市径流污染的有效手段.近年来,中国各地逐步建起了调蓄池并投入运行,然而缺乏科学、合理的方法对已建调蓄池进行评估.围绕调蓄池在污染减排指标、排涝能力指标、截流能力指标、利用效率指标、综合感官指标等方面的作用,构建了一套调蓄池综合环境效益评估指标体系,并用于调蓄池建设与数据监测较完善的深圳市龙岗区丁山河流域调蓄池评估.结果表明,在多种设计降雨量和实测降雨量工况下,使用该指标体系能够简单直观地对调蓄池削减污染、调蓄水量等作用进行较客观的评估,为全面定量分析调蓄池的综合环境效益提供了技术支持.
Abstract
Combined sewer overflow and runoff pollution in the early stage of rainfall are becoming main factors affecting the urban rivers,lakes and other natural water bodies.Detention tanks can intercept the runoff and delay it to send to the sewage treatment plant,which is an effective means to reduce urban runoff pollution.In recent years,detention tanks have been built in various places of China,and have been gradually put into operation.However,there is still a lack of scientific and appropriate method to evaluate detention tanks.Focusing on the role of detention tanks in pollution reduction,flood drainage,runoff intercepting,utilization efficiency and comprehensive sensory,a set of comprehensive environmental benefit assessment index system for detention tank was constructed and it was applied to evaluate the detention tanks in Dingshan River Basin,Longgang District,Shenzhen City,where the detention tank construction and data monitoring were sophisticated.Results showed that under various designed and measured rainfall conditions,this index system could visually and simply evaluate the objective effect of detention tank on pollution reduction and water quantity regulation.Therefore,the index system provided technical support for comprehensive quantitative analysis of the comprehensive environmental benefits of detention tank.
维普
万方数据