Analysis of the change characteristics and effect factors of reference evapotranspiration in Taizi river basin
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Abstract
In this paper, based on the meteorological data of the eight weather stations in Taizi river basin from 1960 to 2005, monthly reference evapotranspiration(ET0) was calculated by the Penman-Montieth formula, the characteristics and trend of ET0 and meteorological factors changed with year and month were analyzed, and the main factors affected ET0 were discussed with statistic method also. The results show that the ET0 in the Taizi river basin is decreased slowly over the past 46 years. The ET0 in May and June is the highest and that of in January is the lowest in the year. The sequences of the main factors affected ET0 are sunshine time, wind velocity, temperature and relative humidity.
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