青草沙水库库区流态及淤积分布特征研究

该文采用Delft3D二维数学模型,分析了青草沙库区流态和淤积分布特征。研究成果表明,青草沙库区除北堤中段附近和青草沙垦区附近外,不存在明显的死水区,库内的水质点都可在不同的时间内运动出库;青草沙垦区南水道的流速大于北水道,南水道是主要的输水和输沙通道,青草沙垦区南部水道淤积远大于北水道。就整个库区而言,淤积主要在上游水闸与引水道两侧、青草沙垦区南部水道,而库区中部和库尾淤积较少。库区年平均淤积量一般在100万t左右。如果取水泵站长期不用,应采取一定措施防止取水泵站出水池的淤积。

Study on Characteristics of Flow State and Deposit Distribution of Qingcaosha Reservoir Area

The article analyzes the characteristics of the flow state and deposit distribution of Qingcaosha Reservoir Area by Delft3D two-dimensional mathematical model.The study result shows that there is no obvious dead water zone except the areas nearby the middle section of the north embankment of Qingcaosha Reservoir Area and the reclamation area of Qingcaosha Reservoir.The water of the water quality points in the reservoir can flow out of reservoir within the different time.The velocity of the south watercourse is larger than the north watercourse in the reclamation area of Qingcaosha Reservoir.The south watercourse is the main channel to convey the water and sand.The deposit of the south watercourse is greatly larger than the north watercourse in the reclamation area of Qingcaosha Reservoir.In term of the whole reservoir area,the deposits are mainly at both sides of the water gate and water approach channel in the upper reaches,and in the south watercourse of Qingcaosha,but a few deposits are in the middle and the end of reservoir area.The annual average deposits are generally about 1 000 000 t in the reservoir.If the intake pumping station is not used for a long time,some measures should be taken to prevent the effluent tank of intake pumping station from depositing.