旧城区雨污合流排水溢流污染控制及地下水生态修复方法研究

Overflow Pollution Control and Groundwater Ecological Restoration of Rainwater and Sewage Combined Drainage in Old Urban Area

旧城区居住环境复杂,排水系统较差,容易发生溢流污染,为此,提出旧城区雨污合流排水溢流污染控制及地下水生态修复方法。先计算水环境污染范围、污染程度以及主要污染物,再利用一维模型得出水环境容量,分别模拟分散源头的控制措施,降低地表径流、设置末端调蓄池、改造截流干管,实现排水溢流污染控制。采用修复植物、导气管、覆土层、修复填料层、布水系统以及抽水系统,实现旧城区地下水修复。实验证明将三种方法相结合能够有效实现污染控制。

The living environment in the old urban areas is complex.The poor drainage system is poor often leads to overflow pollution.This study proposes methods of rainwater and sewage confluence overflow pollution control and groundwater ecological restoration in the old urban areas.Firstly,the water environment pollution range,pollution degree and main pollutants are calculated,and then the effluent environmental capacity is obtained by using the one-dimensional model to simulate the control measures of decentralized sources.The method reduces surface runoff,sets end regulation and storage tanks,and transform the closure main pipe to realize the pollution control of drainage overflow.The restoration of groundwater in the old urban area is realized by using restoration plants,air ducts,overburden,restoration filler layer,water distribution system and pumping system.Experiments show that the combination of the three methods can effectively realize pollution control.