潮白河顺义段再生水利用工程对地下水影响风险管理

发布时间：2018-08-14 14:55

【摘要】：再生水利用是解决水资源短缺和水污染问题的有效途径,越来越受到世界各国的重视。在我国,特别是在严重缺水的北方地区,再生水利用势在必行。北京市人口密集,水资源紧缺,人均占有量不足300m3,是全国人均量的1/8,属于重度缺水区。来源于污水处理厂经深度处理后的再生水水量水质稳定,不仅可以节约宝贵的水资源,同时也缓解污水减排的压力,因此,近年来城市再生水利用工程迅速发展。潮白河是北京重要水源之一,自2007年起,潮白河顺义段再生水利用工程将经MBR处理后的温榆河水调入减河,旨在恢复潮白河生态用水,改善奥运场馆周边及顺义新城水环境。本文旨在研究分析潮白河顺义段再生水利用工程中再生水通过河道入渗方式补给地下水产生的水质安全风险问题。再生水补充河道地表水的同时水中携带的少量残余污染物质可能会造成环境风险。通过调研国内外关于再生水水质、再生水利用对地下水的影响等领域的研究进展及前沿,基于国内现有水质标准规范、效应评估和综合评分,建立了风险影响指标识别评估方法,对风险影响指标进行识别、风险等级评定,提出针对该工程的风险管理对象及目标。基于地下水污染风险评估提出的潮白河顺义段再生利用地下水污染风险管理的对象和目标,结合再生水下渗补充地下水过程分析,提出包括再生水水源水质控制、地表水自净作用、包气带截留作用和地下水利用保护等环节的补水过程风险管理方法和措施。
[Abstract]:The utilization of reclaimed water is an effective way to solve the problem of water shortage and water pollution, and has been paid more and more attention by the countries all over the world. In our country, especially in the northern area where water shortage is serious, reclaimed water utilization is imperative. Beijing is densely populated, short of water resources, less than 300 m3 per capita, is a one-eighth of the national per capita, belongs to the severe water shortage area. The quantity and quality of reclaimed water from sewage treatment plant after advanced treatment are stable, which can not only save precious water resources, but also relieve the pressure of reducing the emission of sewage. Therefore, in recent years, urban reclaimed water utilization project has developed rapidly. Chaobai River is one of the important water sources in Beijing. Since 2007, the reclaimed water in Shunyi section of Chaobai River has been transferred from Wenyu River after MBR treatment to the reduced river, in order to restore the ecological water use of Chaobai River and improve the water environment around the Olympic Stadium and Shunyi New City. The purpose of this paper is to study and analyze the water quality safety risk caused by reclaimed water recharging groundwater through channel infiltration in Shunyi section of Chaobai River. The reclaimed water may cause environmental risk by replenishing the surface water of the river and carrying a small amount of residual pollutants in the water. Based on the research progress and the frontier of domestic and foreign research on the reclaimed water quality and the influence of reclaimed water utilization on groundwater, based on the existing domestic water quality standards, effect evaluation and comprehensive evaluation, The method of risk impact index identification and evaluation is established. The risk impact index is identified and the risk grade is evaluated. The risk management object and target for the project are put forward. Based on the assessment of groundwater pollution risk, the object and goal of groundwater pollution risk management in Shunyi section of Chaobai River are put forward. Combined with the process analysis of reclaimed water infiltration to replenish groundwater, it is proposed that water quality control should be included in reclaimed water source. The risk management methods and measures of surface water self-purification, aeration interception and groundwater utilization and protection.
【学位授予单位】：清华大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703;X523

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