城市内河入河污染物定量控制策略探讨  

Discussion on Quantitative Control Strategy for Urban River Pollutants

作　　者：栾敬帅 LUAN Jingshuai(Shanghai Municipal Engineering Design and Research InstituteCo.,Ltd.,Shanghai 200092,China)

机构地区：[1]上海市政工程设计研究总院<集团>有限公司,上海200092

出　　处：《净水技术》2024年第3期159-165,180,共8页Water Purification Technology

基　　金：上海市“科技创新行动计划”社会发展领域项目(17DZ1202600);上海市青年科技英才扬帆计划(21YF1443900);上海城投(集团)有限公司科技创新计划(CTKY-ZDXM-2022-003)。

摘　　要：城市内河水环境与城市居民生活幸福指数息息相关。在幸福美丽河湖的背景下,水环境治理的目标已由消除黑臭水体提高至全方位水质保障,提升水体的水质稳定性成为新时代河湖治理面临的挑战之一。文章以南方某入江一级支流约17.0 km长的城市区间段为研究对象,以5条汇入的主要城市内河流域为边界划分控制单元,分析2020年研究河段化学需氧量、氨氮和总磷3个指标的全年时空变化特征,确定超标次数较多的氨氮为主要水质控制指标,在排水管网分析的基础上,发现主要污染源为雨天城市面源污染。在雨水径流实际水质监测数据的指导下,根据各控制单元内雨污混接比例,分解各单元污染贡献比,采用容量控制方法,以控制断面水质达标为目标计算水环境容量,反推最大允许排污量并计算分配各控制单元的污染物削减率。经计算,在对各控制单元内的存在雨污混接区域的雨水按照年径流总量控制率76%标准进行控制后,可满足研究区间河道水质稳定在地表Ⅲ类水的需求,为系统化治理措施的规模确定提供量化指导。The environmental quality of urban river water is closely related to the life satisfaction of urban residents.In terms of creating happy rivers and lakes,the aim of water environment management is transitioning from removal of black and ordrous waters to comprehensive safeguarding of stable water quality of rivers and lakes.This paper researched a 17.0 km primary tributary of the Yangtze River in urban zone of southern China,which has 5 main urban rivers flowing into it.After analyzing surface water quality monitoring data of 2020,ammonia nitrogen was determined as control index,which exceeded control limit frequently.Based on drainage system analysis,urban non-point source pollution was found to be the main contribution.The pollution contribution ration of 5 urban river catchment was calculated using actual stormwater monitoring data,and the maximum allowable pollution load was determined based on water environmental capacity in terms of water quality goal.The conclusion was 76%of annual stormwater runoff had to be collected and controlled,in order to eliminate enough non-point source pollution and keep the river water quality stabilizing in surface water classⅢstandard.

关 键 词：城镇水环境 综合治理 面源污染 水环境容量 海绵城市 系统调蓄 

分 类 号：TU992[建筑科学—市政工程]