基于目标评测模型的城市水环境治理成效评估  

Effectiveness evaluation of urban aquatic environment improvement based on target accessibility model

作　　者：唐洋博 李玮 吴一帆 李翀 TANG Yangbo;LI Wei;WU Yifan;LI Chong(YANGTZE Eco-Environment Engineering Research Center,China Three Gorges Corporation,Beijing 100038,China)

机构地区：[1]中国长江三峡集团有限公司长江生态环境工程研究中心,北京100038

出　　处：《人民长江》2023年第2期98-105,共8页Yangtze River

基　　金：国家自然科学基金项目“长江流域生态补偿机制研究”(U2040206)。

摘　　要：评估城市水环境治理策略成效,对优化城市排水工程布局至关重要。为探索城市水环境治理成效评估的方法,选择湖南省岳阳市东风湖排水片区,针对不同的排水特征构建城市排水目标评测模型,并评价了9种水环境治理策略,即排口强化、源头治理、雨污分流、调蓄池、污水厂提标以及4种综合策略的成效。结果显示:研究构建的目标评测模型既能较好地重现东风湖排水片区的现状,也能大致评估水环境治理策略的成效,COD浓度平均相对误差为0.034。对于单一治理措施,新建调蓄池能降低23%的溢流量,源头治理在消减污染物浓度和溢流量峰值中起到重要作用;相比于单一治理措施,综合治理措施能更好地实现水环境质量的提升,其中策略9能实现东风湖长时间维持Ⅳ类地表水的水平。This study aims at exploring and evaluating the effectiveness of water environment improvement strategies,which is crucial for the optimization of urban drainage projects layout.We selected the drainage area of Dongfeng Lake in Yueyang City as the study area,and constructed a target accessibility model according to local drainage system characteristics.The effectiveness was evaluatedamongnine water environment improvement strategies,including storm sewer outlet control,source control,separated sewer system construction,retention tank,waste water treatment plant upgrading,and four comprehensive treatment strategies.The results show that the target accessibility model can not only reproduce the current scenario in Dongfeng Lake drainage area,but also evaluate the effectiveness of the improvement strategies.The mean relative error of COD concentration is 0.034.For the single strategy,the retention tank strategy can reduce the volume of overflow by 23%,and the source control strategy plays an important role in reducing the peak of pollutants and the volume of combined sewer overflow.By contrast,the comprehensive strategies can better improve the water quality,especially the ninth strategy can maintain the classⅣsurface waterin Dongfeng Lake.

关 键 词：环境系统工程 水环境治理 目标评测模型 城市排水系统 东风湖 

分 类 号：X52[环境科学与工程—环境工程]