丹江口水库蒸发量与气象因子关系分析

Analysis of relationship between evaporation of Danjiangkou Reservoir and meteorological factors

为研究丹江口水库水面蒸发量与不同气象因子之间的关系,采用灰色关联分析方法对影响水面蒸发量的主要气象因子进行统计分析,并建立多元线性回归模型。研究结果表明:(1)丹江口水库蒸发站气象因子对水面蒸发量影响大小顺序为:降水量>日照>水温>水汽压>气温>相对湿度>风速>气压;(2)采用多元线性回归模型进行蒸发的模拟计算具有较好的精度。研究成果可为分析大中型水库蒸发量与不同气象因子之间的关系提供借鉴。

In order to study the relationship between water surface evaporation of Danjiangkou reservoir and different meteorological factors,the main meteorological factors affecting water surface evaporation were statistically analyzed by grey correlation analysis method,and a multiple linear regression model was established.The results showed that:(1) The order of influence of meteorological factors on water surface evaporation is precipitation> sunshine> water temperature> water vapor pressure> air temperature> relative humidity> wind speed> air pressure;(2) the multiple linear regression model has good accuracy in evaporation simulation.The analysis result can provide reference for the study on relationship between evaporation of large and medium reservoir and meteorological factors.