坪上水库库区水质预测研究

水库蓄水后,水深及水面积都有大幅度的增加,水流变缓,将在根本上改变水流的性质.因此,在充分调查现有污染源及水文条件的基础上,对水库运行后水质影响进行预测分析,预测结果对控制水环境污染及水资源的合理应用有重要作用.以坪上库区干流南庄代表性断面水质监测数据为基础,用MIKE21对水质(COD,TP)进行预测,并采用EUTRO模型对各断面的COD,TP进行模拟预测.对两种水质模型的模拟结果进行比较,得出预测趋势一致,水库对COD浓度的减小作用较强,对总磷浓度也有一定的消减作用,出库水质有明显改善.在维持现有污染负荷不变的情况下,蓄水后库区水质不会发生恶化.

Research on the water quality prediction of Pingshang Reservoir

Water depth and area of reservoir has been a significant increase and water flow slows down after impoundment, and this will fundamentally change the nature of water. Therefore, on the basis of the full survey of existing pollution sources and hydrological conditions, prediction on the water quality after the operation of reservoir plays an important role to the control of water pollution and the rational use of water resources. In this study, based on historical data of water quality monitoring of the Nanchang representative sections of Pingshang Reservoir, predict water quality （COD, TP） by MIKE21, and simulate and predict TP, COD of the cross-section by EUTRO model. The simulation results of the two water quality model obtained the same trend, a strong decrease of COD concentration, a certain reduction of Total phos phorus concentration, and a significant improvement of the water quality. With the existing pollution load, deterioration of water quality would not occur after water storage of reservoir.