摘要
以涪陵城区典型合流雨污溢流口——城五校溢流口(检查井编号为YW22-3J)为研究对象,对山地城市初期合流溢流污水的冲刷效应进行研究。研究结果表明,涪陵城区初期合流溢流污水中污染物的EMC值如下:TSS=477 mg/L、TCOD=530 mg/L、TP=3.11 mg/L、TN=26.2mg/L,均高于地表水Ⅴ类标准限值;当降雨强度较大时,初期合流溢流污水的TCOD、TSS、TP、含砂量等指标均有明显的初期冲刷效应。总体来说,山地城市初期合流溢流污水冲刷效应一方面受到降雨量、降雨强度、降雨历时、雨前晴天数、地表沉积物和管道沉积物积累等因素影响;另一方面,山地城市地势高差大、管网落差明显的特征,强化了初期合流雨污水的冲刷效应,增加了溢流雨污水中污染物的扩散程度,对周边水体造成的污染更为严重。
A typical overflow outlet in a mountainous city, the Chengwuxiao （No：YW22-3J） in Fuling, was selected to study the flush effect of initial overflows from a combined sewer system. The results showed that the EMCs including TSS = 477 mg/L, TCOD = 530 mg/L, TP = 3.11 mg/L and TN = 26.2 mg/L were higher than the V criteria specified in the Environmental Quality Standards for Surface Water. During massive rainfall, TCOD, TSS, TN and TP showed markable first flush effects. The flush effect of initial overflows from a combined sewer system is influenced by amount of rainfall, rainfall inten- sity, rainfall duration, number of dry days before rain, accumulation of surface sediments, and pipeline sediment. The large terrain height difference and large elevation drop of sewer flow strengthened the flush effect of initial overflows from the combined sewer system and increased contaminant diffusion, which caused more serious pollution in surrounding water.
出处
《中国给水排水》
CAS
CSCD
北大核心
2012年第11期57-60,共4页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2009ZX07318-008-003)
关键词
三峡库区
山地城市
初期合流溢流污水
冲刷效应
Three Gorges reservoir region
mountainous city
initial overflows from combinedsewer system
flush effect
作者简介
E—mail：hucheng77814@163．com.
