Recent Spatio-temporal Change Characteristics of Pan Evaporation and Possible Climate Factors in Dongjiang River Watershed, South China
WANG Zhao-li
CHEN Xiao-hong
HUANG Guo-ru
YANG Tao
Abstract：Recent spatio-temporal change characteristics of pan evaporation and possible climate factors in Dongiang River watershed from 1956 to 2000 are analyzed by using the observed monthly data.The results show a significant decrease in the pan evaporation in Dongjiang River watershed.The rate of decrease is about -30.9 mm/10a.And there exists an abrupt decrease in yearly mean pan evaporation in the year 1986.The main climatic factors for the change of the pan evaporation are analyzed by studying the relationship between the pan evaporation and climate elements such as the sunshine duration,the average wind speed,the diurnal temperature range(DTR),the mean maximum and minimum temperature,the mean temperature and the precipitation,and so on.It is thus obvious that the decrease of the pan evaporation was mainly caused by the decreasing solar radiation,the sunshine duration and average wind speed.The DTR may also contribute a lot to the decrease in the pan evaporation in Dongiang River watershed.
Keywords：pan evaporationspatio-temporal change characteristicsDongiang River watershed
Publication Date：2009-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：4( 22-25 )