湖库水温计算方法及结果分析

对湖库水温计算经验公式法和数学模型法进行了详细介绍，将两种方法分别用于三峡水库香溪河库湾水温计算中，发现采用经验公式法与数学模型法计算结果与实测值相比的RMSE分别为1.063 ℃和0.349 ℃，因此数学模型法比经验公式法计算精度高。另外，经验公式法仅能给出水温沿垂向的变化，本文所建立的水温与水动力相互耦合数学模型能够全面描述研究区域的三维水温分布特性。

Calculation method of lake-reservoir water temperature and its result analysis

The empirical formula method and mathematical model method for calculating the lake-reservoir water temperature are introduced in detail，and then both the methods are respectively applied to the calculation of the water temperature in the Xiangxi Bay of Three Gorges Reservoir. The results show that the RMSE（root-mean-square error） of temperature compared between the calculated values from the methods of empirical formula and the mathematical model and the measured value are 1.063 ℃ and 0.349 ℃ respectively，thus the precision of the mathematical model is higher than that of the empirical formula，additionally，only the vertical profile of the water temperature can be obtained by the empirical formula as well. However，a hydrodynamic-water temperature coupled mathematical model established herein can comprehensively show the characteristics of the 3-D water temperature distribution in the study area concerned.