摘要
通过对西安市降雨过程中不同下垫面径流雨水水质分析,研究了雨水中污染物来源及水质变化特征.结果表明:西安市径流雨水中SS、COD、NH3-N、TP均超过GB3838-2002《地表水环境质量标准》的Ⅴ类标准;其中SS、COD、TP主要来源于径流过程雨水对下垫面的冲刷,NH3-N主要来自源于降雨对大气的直接淋洗;径流雨水中各污染物浓度随降雨历时呈下降趋势,最终趋于稳定;雨水径流污染物SS与COD、TP、NH3-N的相关性较强,说明污染物质多以SS形态存在,控制雨水径流污染和雨水处理的关键是去除雨水径流中的SS.
Through the analysis of different underlying surfaces during rainfall Xi′an stormwater runoff water quality,this paper studies the sources of pollutants in stormwater and water quality variations.The results showed that the SS,COD,NH3-N,and TP of rainwater in Xi′an exceed Ⅴ water requirements of GB3838-2002 in ＂Surface Water Environmental Quality Standard＂.SS,COD and TP are mainly from rainfall runoff process by the underlying surface erosion and NH3-N is mainly from the leach of atmosphere caused by rainfall.The concentration of pollutants shows overall downward trend in rainfall process,tends to be stable eventually.SS,the pollutant of stormwater runoff is related to COD,TP and NH3-N.All kinds of pollutants are mostly attached to the particles.The removal of SS is the key to the control of the stormwater runoff pollution and stormwater treatment.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2011年第3期391-395,共5页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家十一五重大水专项子课题资助项目(2009ZX07318-008-004)
关键词
降雨
径流污染
相关系数
雨水利用
西安
rainfall
runoff pollution
correlation coefficient
rainwater utilization
Xi′an
