再生水补给条件下河流水质及河岸渗滤水质演变试验  

Experimental study on the evolution of river water quality and riverbank percolation water quality under reclaimed water supply

作　　者：郭中方 潘成忠[1,2] 刘春雷 汪啸宇 GUO Zhongfang;PAN Chengzhong;LIU Chunlei;WANG Xiaoyu(College of Water Science,Beijing Normal University,Beijing 100875,China;Beijing Key Laboratory of Urban Hydrological Cycle and Spongy City Technology,Beijing 100875,China)

机构地区：[1]北京师范大学水科学研究院,北京100875 [2]城市水循环与海绵城市技术北京市重点实验室,北京100875

出　　处：《南水北调与水利科技（中英文）》2020年第2期126-134,共9页South-to-North Water Transfers and Water Science & Technology

基　　金：国家水环境治理重大专项(2018ZX07101005-04);国家自然科学基金(41771305,41530858)。

摘　　要：由于人类活动影响加剧,永定河呈现水量锐减以及水环境持续恶化的趋势,生态环境遭到严重破坏。在此背景下,永定河生态重建工程亟待开展,生态补水方式急需确定。为探究多水源生态补水方式对河流水质及河岸渗滤水质演变的影响,开展模拟试验,探究流速、温度和土壤渗滤对再生水补水水质的影响。研究结果表明:流速增加有利于污染物降解;与高温相比,低温条件下的污染物降解能力明显优于高温,表明低温在一定程度上有利于再生水补水水质的改善;河岸渗滤水某些水质指标有一定程度的好转,但由于河底沉积物的聚集吸附作用使得通过土壤的水体轻微富营养化。最终结果表明,流速对于再生水补水水质指标影响最大。In recent years,Yongding River exhibited a sharp decrease in water quantity,a trend of continuous deterioration of the water environment,and serious damage to ecological environment due to the intensified influence of human activities.Under this background,there is an urgent need of an ecological reconstruction project and the determination of ecological water replenishment mode in the Yongding River.In order to explore the influence of multi-water source ecological replenishment mode for the evolution of river water quality and riverbank percolation water quality,this study conducted a simulation experiment to explore the influence of flow rate,temperature and soil percolation on reclaimed water replenishment water quality.The results showed that the increase in flow velocity was beneficial to the degradation of pollutants.Compared with high temperature,the degradation capacity of pollutants at low temperature was significantly better than that at high temperature,indicating that low temperature was beneficial to the improvement of reclaimed water quality to some extent.Although water quality indexes of riverbank leachate improved to some extent,but the water passing through the soil was slightly eutrophication due to the aggregation and adsorption of river bottom sediments.The final results showed that the flow velocity had the greatest influence on the quality index of regenerated water.

关 键 词：水质指标 模拟河道 渗漏水 流速 温度 

分 类 号：TV213.4[水利工程—水文学及水资源] X522[环境科学与工程—环境工程]