摘要
初期径流污染是城市面源污染的主要组成部分,但目前对初期径流的定义、弃除量等都没有统一的说法,而且影响初期效应的因素多而复杂,并与地区特性紧密相关。通过对北京雨水利用示范区降雨及屋面径流水质监测数据的分析,初步探讨了不同初期径流弃除量对污染负荷的削减效果。在不同降雨特性下,屋面产流后弃除2 mm雨量可削减20%～45%的污染负荷,故建议北京市屋面初期径流弃除量标准按2 mm雨量考虑。
First flush pollution is a main part of urban non-point source pollution. Presently, a definition of first flush and its discharge volume are unclear. Factors influencing the first flush effect are numerous and complex, often related to local properties. Through analysis of monitored rainfall and roof runoff quality in Beijing stormwater utilization demonstration area, the effect of different first flush discharge volumes on pollution load reduction is preliminarily discussed. Under different rainfall characteristics, discharging 2 mm precipitation from roof runoff can reduce the pollution load by 20% to 45%. Thus, the first flush discharge volume of roof runoff at 2 mm precipitation is proposed for Beijing.
出处
《中国给水排水》
CAS
CSCD
北大核心
2010年第7期40-42,共3页
China Water & Wastewater
基金
水利部公益性行业专项(200801108)
国家科技支撑计划项目(2006BAB14B03
2007BAC22B01)
关键词
初期径流效应
弃除量
屋面
污染负荷
first flush effect
discharge volume
roof
pollution load
