海绵城市合流制排水的污染带特性研究

Analysis of Pollution Zone Characteristics of Sponge City Confluence Drainage

针对海绵城市合流制排水的污染带特性进行分析,将取样点分别设置在工业区和生活区。在晴天和雨天环境下,得到工业区和生活区取样周期内COD、SS、NH3-N和TP污染物监测结果。晴天工业区取样周期内COD变化趋势为先上升后下降,SS变化趋势为先下降后上升,NH3-N变化趋势为先下降后上升再下降,TP变化趋势为先下降后上升再下降;晴天居民区COD变化趋势为持续下降,SS变化趋势为上下不断波动,NH3-N变化趋势为上下波动,TP变化不大;雨天工业区取样周期内COD整体变化为先上升后下降,最后趋于稳定状态,SS浓度呈先上升后下降再上升的变化趋势,NH3-N变化情况为先上升,后下降再趋于平稳,TP浓度整体变化不大,相对平稳;雨天居民区COD浓度变化为先上升后下降,SS为先上升后下降最后趋于平稳,NH3-N浓度变化为先上升后下降,TP浓度变化趋势为先上升后下降。

The characteristics of the pollution zone of the sponge city confluence drainage are analyzed.A town-level area was selected for monitoring experiments,and sampling points were set in industrial and living areas.Under sunny and rainy days,the monitoring results of COD,SS,NH3-N and TP pollutants in the sampling period of industrial and living areas were obtained.During the sampling period of the sunny industrial zone,the trend of COD changes first and then decreases.The trend of SS changes first and then rises.The trend of NH3-N decreases first and then rises and then decreases.The trend of TP changes first and then rises and then falls.The trend of COD in the district is continuously decreasing,the trend of SS is fluctuating up and down,the trend of NH3-N is up and down,and the change of TP is not big.The overall change of COD in the sampling period of rainy industrial zone is first rising and then falling,and finally tending to steady state.The concentration of SS increased first,then decreased and then increased.The change of NH3-N increased first,then decreased and then stabilized.The overall change of TP concentration was not large and relatively stable.The change of COD concentration in rainy residential areas increased first.When it falls,SS rises first and then falls,and finally stabilizes.The change of NH3-N concentration first rises and then falls,and the change trend of TP concentration rises first and then falls.