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| DOI： |
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| Simulation and Analysis of Actual Evapotranspiration in Minjiang River Basin Based on Budyko Hypothesis |
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ZHOU Junhua, YIN Duohao, FAN Yunhe, LIU Tiegang
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State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China
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| Abstract: |
| On the basis of Budyko hypothesis, Fu Baopu model was used to calculate the actual evapotranspiration in Minjiang River Basin during the period of 1980—2010. The Mann-Kendall statistical test, Pettitt test, and IDW interpolation method were selected to detect the spatial and temporal variations of actual evapotranspiration. The results showed that model had an acceptable performance in simulating the actual evapotranspiration (ET) in the study area. The annual actual ET had a significant decreasing trend at the 99% confidence level, with a decreasing trend from the southeast to the northwest. The sensitivity analysis revealed that the most important climate factor influencing the actual ET in Minjiang River Basin was precipitation. |
| Key words: Budyko hypothesis; model; actual evapotranspiration; temporal and spatial trends; sensitivity |
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