涪陵污水处理厂排污口的污染带特性分析  

Characteristics of Pollution Zone around Drain Outlet of Fuling Sewage Treatment Plant

作　　者：黄程[1] 邓春光[1] 李晓[1] 幸治国[1] 白杨[1] 

机构地区：[1]重庆市环境科学研究院,重庆401147

出　　处：《中国给水排水》2009年第2期105-108,共4页China Water & Wastewater

基　　金：重庆市科技攻关项目(CSCT2006AC7024);三峡工程生态与环境监测系统项目(SX2007-013)

摘　　要：对涪陵污水处理厂排污口的污染带,在枯水期的水文、水质、污染负荷进行了现场同步监测,采用平面二维连续点源污染带解析解模型模拟计算了污染带的最大长度、最大宽度和影响范围,对污染指标CODMn、NH3-N、TP的空间分布特性进行了趋势分析。结果表明,三峡水库蓄水156m后涪陵污水处理厂排污口附近的河道变宽,水深加大,流速减缓,致使污染物较长时间停留在排污口附近水域稀释和扩散,各断面的污染指标浓度在垂向上扩散较为均匀。受排污口的污染物水下排放、污染物混合程度、水质背景和水流状态等因素的综合影响,在排污口附近及下游仍会形成超背景污染带和超标污染带。The field synchronous monitoring of hydrology, water quality and pollution loads in the pollution zone around the drain outlet of Fuling Sewage Treatment Plant in low water period was carried out. The geometric parameters and influence coverage of the pollution zone were calculated by a two-dimensional continuous point source water quality model. The space distribution tendency of CODMn, NH3 -N and TP was analyzed. The results show that after storing water up to 156 m in the Three Gorges reservoir, the variations of riverway breadth, water level and velocity result in pollutants being stagnated around the drain outlet for a long time and vertically diffused relatively evenly. Under the comprehensive influence of factors such as underwater drainage, contaminant mixing degree, water quality background, hydraulic state and so on, super-background and over-standard pollution zones are still engendered around the drain outlet and downstream.

关 键 词：三峡水库 排污口 污染带 

分 类 号：X52[环境科学与工程—环境工程]