典型缺水城市水体水环境容量计算及水质改善研究——以荥阳市枯河为例  

Calculation of Water Environmental Capacity and Improvement of Water Quality of Water in Typical Water Shortage Cities——A Case Study of Kuhe River in Xingyang City

作　　者：王冰一 张鹏 宋刚福 梅书浩 李明月 Wang Bingyi;Zhang Peng;Song Gangfu;Mei Shuhao;Li Mingyue(School of Environmental and Municipal Engineering,North China University of Water Resources and Electric Power,Zhengzhou,Henan 450046,China;Henan Key Laboratory of Water Environment Simulation and Treatment,Zhengzhou,Henan 450046,China)

机构地区：[1]华北水利水电大学环境与市政工程学院,河南郑州450046 [2]河南省水环境模拟与治理重点实验室,河南郑州450046

出　　处：《绿色科技》2022年第24期160-166,共7页Journal of Green Science and Technology

摘　　要：缺水型城市的黑臭水体流动性低,存在治理难、易反复的问题,通过污水资源化利用改善城市内河水质是当前研究的热点。以荥阳市枯河为例,通过构建一维水环境数学模型,开展了枯河水环境容量计算及水质改善研究,结果表明:(1)基于污染源计算结果,利用分担率法计算出广武镇对污染物贡献占比最大,分别达到58.07%、67.82%、57.79%;农村生活污水对COD、氨氮贡献占比最大,农业面源对总磷贡献占比最大。(2)基于“双达标”的水环境容量计算方法,计算得到不同污水处理厂尾水水质条件下的枯河水环境容量,其中现状尾水水量水质条件下枯河COD、氨氮、总磷的环境容量为636.01 t/a、30.55 t/a、7.80 t/a。(3)以最不利氨氮为例,污水处理厂尾水现状、城镇污水处理厂污染排放限值一级A标准的水质条件下,削减率分别为12.76%、98.19%,尾水一级A排放水质条件下,枯河下游严重超过功能区水质要求,难以通过削减污染物排放来改善水质。研究综合分析区域污染源分布特征,对不同条件下水环境容量进行了计算分析,针对性地给出了上游污水处理厂尾水水质不同条件下污染物削减量,结果可为荥阳市及更多缺水型城市水环境综合治理提供参考。The black and odorous water in water-deficient cities has the problems of low fluidity, difficult treatment and easy repetition. It is a hot research topic to improve the water quality of urban rivers through sewage resource utilization. In this paper, taking the dry river in Xingyang City as an example, by constructing a one-dimensional mathematical model of water environment, the calculation of water environmental capacity and water quality improvement of the Kuhe river is carried out. The results show that:(1) Based on the calculation results of pollution sources, the contribution of Guangwu Town to pollutants is the largest, which is 58.07 %, 67.82 % and 57.79 %, respectively. Rural domestic sewage has the largest contribution to COD and ammonia nitrogen, and agricultural non-point source has the largest contribution to total phosphorus.(2) Based on the calculation method of water environmental capacity of ’double standards’, the environmental capacity of Kuhe river under different tail water quality conditions of sewage treatment plants is calculated. The environmental capacity of COD, ammonia nitrogen and total phosphorus in Kuhe river under the condition of current tail water quality is 636.01 t/a, 30.55 t/a and 7.80 t/a.(3) Taking the most unfavorable ammonia nitrogen as an example, the reduction rates were 12.76 % and 98.19 % respectively under the water quality conditions of the tail water status of the sewage treatment plant and the first level A standard of the pollution discharge limit of the urban sewage treatment plant. Under the condition of the discharge water quality of the tail water first level A, the downstream of the Kuhe river seriously exceeded the water quality requirements of the functional areas, and it was difficult to improve the water quality by reducing the discharge of pollutants. This study comprehensively analyzes the distribution characteristics of regional pollution sources, calculates and analyzes the water environment capacity under different conditions, and provides targ

关 键 词：水环境容量 水质数学模型 污染物削减 污水资源化利用 枯河 

分 类 号：X52[环境科学与工程—环境工程]