多系统初雨末端截流总管的水力计算初探

Analysis on Hydraulic of Main Pipes with End Inception from Multiple Drainage Systems

随着水环境综合治理的大力推进,许多城市旱天已消除河道黑臭.降雨后,引起的河道黑臭时有发生,初期雨水和管道沉积物的贡献最大,因此,初期雨水的有效收集和治理尤为重要.初雨治理是巩固黑臭河道治理成果的重要方法.为解决初雨对河道水质的影响,常沿河设置初雨截流总管,收集多个系统排口的初期雨水.但由于排口收纳的流量是变化的,无法用传统污水截流方式进行计算,文中拟通过排水水力模型进行模拟,根据降雨特征论证截流量的差异.

As great progress of comprehensive treatment and management in water environment,black-color and odorous in river for many cities has been eliminated during dry season.Black-color and odorous can occasionally happen again after a storm event.Harvest and management of initial runoff effectively is more important as initial runoff and sediments contribute most.Comprehensive treatment and management for initial runoff is the key method to consolidate the outcome of eliminating black-color and odorous in rivers.Main pipes along the river to collect initial runoff from outlets of multiple systems are set to remove the effect from initial runoff to rivers.The traditional method to calculate the inception of sewer is not appropriate as the flow from outlets varies.The paper discusses the difference of inception flow based on rainfall characteristics by using a hydraulic model.