短管截流系统在合肥市坝下河综合整治工程中的应用

Application of Short Tube Interception System in Hefei Baxia River Comprehensive Rehabilitation Project

为有效削减地表径流的初期雨水和错接的污水对合肥高新区坝下河的影响,采用短管截流系统对河道两侧各分散出口进行截流,其设计重现期p=0.08年,截流井为跳跃堰式。结果表明,短管截流系统能够有效收集河道沿岸各分散排水口地表径流产生的初期雨水,完全截流旱季错接污水,从而有效减少地表径流初期雨水和错接的污水进入坝下河,减轻其对城市内河的污染。

To effectively reduce the influenceof initial rainwater from surface runoff and dry weath- er flow in the wrong connection on Baxia River in Hefei High Tech Zone, the each dispersion outlet at both sides of the river was intercepted by the short tube interception system. The design return period was 0.08 year. The interception well was jumping weir intercepting well. The results showed that the short tube interception system could effectively collect the initial rainwater from surface runoff coming from the each dispersion outlet at both sides of the river, and intercept the dry weather flow in the wrong connec- tion, thus effectively reducing their flowing into the Biaxia River and the pollution of the urban river.