摘要
截流式合流制溢流(CSOs)污水及污染负荷往往发生在较大降雨和暴雨过程中,基本无监测数据积累,CSOs负荷量的核定十分困难.本文选择辽宁省营口市西部污水处理厂服务范围内的截流式合流制排水体制区域为研究区域,在收集整理排水管网数据、气象数据、土地利用数据等资料的基础上,应用基于污染物堆积和冲刷过程的机理模型——SWMM模型模拟和分析了研究区域降雨径流污染过程.模型使用西部污水处理厂进水水量、水质实测数据进行参数率定和模型验证,模拟了降雨径流污染负荷产生过程和溢流过程.研究表明,降雨量是城市降雨径流污染负荷的重要影响因素,但不是唯一的决定因素.降雨历时、降雨强度、干期天数等都会影响城市降雨径流污染负荷量.溢流口CSOs污水量和负荷与降雨量之间有较好的线性关系,同时降雨强度对溢流口CSOs的污染物负荷也有较大影响.
Load estimation of the combined sewer overflows（CSOs） from the intercepted combined sewer system is quite difficult,because CSOs usually happened in large rainfall and storm events and lack of observed data.Based on investigation of sewer discharge networks,meteorological data and land use map,SWMM model was developed for the catchment of western wastewater treatment plant（WWTP） in Yingkou City,and was calibrated and validated using observed water flow and quality data at inlet station of WWTP.CSOs simulation data showed that rainfall amount was a very important factor for urban runoff pollution,but it was not the unique factor.Rainfall retention period,rainfall intensity and dry period prior to rainfall event all influenced greatly the runoff pollutant loads of CSOs.Data also showed that water flow and pollutant load of CSOs were correlated with rainfall amount.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第5期537-541,共5页
Journal of Beijing Normal University(Natural Science)
基金
国家水体污染控制与治理科技重大专项资助项目(2009ZX07526-005)
