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 class Ⅲ standard.
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
Key words
urban water environment/comprehensive management/non-point source pollution/water environmental capacity/sponge city/storage system
维普
万方数据