2008•Journal of China HydrologyRequires access

Using Complementary Relationship to Estimate Monthly Evapotranspiration in Arid Oasis

Zengchao Hao

Abstract

The complementary relationship indicates the relationship between regional potential and actual evapotranspiration,which can be used to calculate regional evapotranspiration from available meteorological data.However,relevant models were mainly used in humid and sub-humid areas.By using hydrological and meteorological data in the Yerqiang Oasis in arid area in Xinjiang,annual actual evapotranspiration was calculated with water balance model,and annual potential evapotranspiration was calculated with the modified Penman equation.The results show that the complementary relationship between potential and actual evapotranspiration is applicable in the Yerqiang Oasis.Monthly evapotranspiration was calculated with the CRAE(Complementary Relationship Areal Evapotranspiration) model.The results of annual evapotranspiration are close to water balance results,and the variation of monthly evapotranspiration is also rational.These show that CRAE model is applicable in estimating monthly evapotranspiration in arid oasis.

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Key concepts: Evapotranspiration, Arid, Environmental science, Water balance, Hydrology (agriculture), Geology, Ecology, Biology