一维垂向水库水温数学模型研究与黑河水库水温预测

Research On 1-D Water Temperature Model of Reservoir and Temperature Prediction for Hei River Reservoir

根据黑河水库的特点与类比库实测水温分布特性,对现有一维垂向水温模型进行了改进,提出一个包括入库泥沙影响的水库垂向水温预测模型。根据类比库的率定结果和黑河水库的实际情况,并参考前人的经验,合理选择了模型参数,在此基础上,分别预测了丰、平、枯三种代表年及不同运行方式的水温分布。

According to existing water temperature models and based on temperature distribution measured in analogous reservoir, an one-dimension vertical temperature model for reservoir has been studied in this paper. Some distinguishing features of this model are as follows: firstly, it deals with the influence of sediment-laden inflow on water temperature distribution in reservoir; secondly, computation of velocity field in reservoir is simplified, the velocity profile of inflow and outflow is presented as triangle or uniform; finally, inflow mixing and wind-mixed processes are neglected. To test its applicability, the model is applied to Feng Jiashan Reservoir in which water temperature data have been measured. The results demostrate that temperature profiles calculated agree well with measured values. The objective of this study is to predict temperature distribution for Hei River Reservoir planning to build. The temperature profiles of three representative years (plentiful, ordinary, and dry year)and three operation schemes (water intake from surface, middle, and bottom layers in reservoir)are predicted by the model. Analysis shows that the results predicted are reasonable.