湿润地区年陆地蒸发量系列分析与应用

本文根据水量平衡原理,提出流域蓄水变量分层计算法,而使年陆地蒸发量计算式得解,从而获得了年陆地蒸发量系列的重要成果。

A STUDY OF THE ANALYSIS AND APPLICATION FOR ANNUAL LAND EVAPORATION IN THE WET REGION

The annual evaporation of the wet region here is defined as the sum of the evaporation from water, soil and the evoportranspiration from plant in the study region. According to the water balance principle, for a closed basin, the annual evaporation can be written as:E_i=P_i-R_i±ΔW_i(1).In which ΔW_i is the difference of the water storage of the basin. 1 proposed to solve the above equation by seperating the soil into different zones.I found that, from the analysis of three factors of annual water balance in the wet regions of Fujian province, land evaporation is quite stable from year to year and its covariance C_v=0.09. I also found that, from the analysis of the presentative of the mean, if the mean of a short series has a good presentative then it can be used as the mean of long series.From the fact that the annual evaporation in the wet region is quite stable from year to year, by study I suggest the following equation to calculate the statastic parameters of annual runoff.