三峡水库175m蓄水后川维厂排污口污染带预警分析  

Forewarning Analysis of Chuanweichang Contamination Zone around Discharge Outlet after Impounding in Three Gorges Reservoir at Water Level of 175 Meter

作　　者：黄程[1] 邓春光[1] 朱德军[2] 任春坪[3] 幸治国[1] 

机构地区：[1]重庆市环境科学研究院,重庆401147 [2]清华大学水利水电工程系,北京100084 [3]西南大学化学化工学院,重庆400715

出　　处：《安徽农业科学》2009年第23期11098-11100,共3页Journal of Anhui Agricultural Sciences

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07104-006-02);重庆市科技攻关项目(CSCT2006AC7024)

摘　　要：采用深度平均二维非恒定流数值模型模拟了175 m水位川维厂排污口附近的流场和浓度场,利用TECPLOT软件绘制了其排污口污染带分布图,并根据预测结果进行了预警分析。结果表明,蓄水后川维厂排污口附近的河道变宽,水深加大,流速由天然状况下的1.5 m/s陡降至0.2 m/s。受河道地形的影响,在川维厂排污口附近及其上游形成了一个明显的回水区域,致使污染物长时间停留在排污口附近水域稀释扩散,其排污口附近江段的水环境容量比天然状况将会变小,在处理后排放、未处理直排和污染事故排放3种工况下均会形成一条明显的超背景和超水质标准污染带,将无法满足附近江段水域功能要求。Adopting a depth average two dimension non-invariablenes current numerical matrix , flowing and CODMn concentration field of Chuanweichang contamination zone around discharge outlet after impound at water level of 175 m were simulated. Furthermore, contamination zone around discharge outlet distribution figure were drawn by using TECPLOT software. Particularly, forewarning analysis close tied to forecast results. It indicated as below, riverway and water depths broaden nearby the discharge outlet, precipitate velocity of flow which was 1.5 meter per second by nature into 0.2 meter per second. A distinct backwater area which brought on pollutant localizing durative was ill affected towards riverway landform nearby and upriver the discharge outlet. In conclusion, the water environment capability nearby the discharge outlet diminished rapidly than natively status. All discharging pattern of dispose up to par, non-dispose and contaminated accident transnormal will still come into being overrun background and water quality standard contamination zone. Furthermore, it cannot answer water area function needs.

关 键 词：三峡水库 排污口 污染带 预警 

分 类 号：X524[环境科学与工程—环境工程]