Abstract：Evapotranspiration plays an important role in the water cycle. Model simulation method has the advantages of high temporal and spatial resolution for the study of small watershed scale evapotranspiration. This study selects the Jiang River Basin in Shiyan City， Hubei Province as the research area. Based on the BEPS-Terrainlab v2.0 model， using Landsat5-8 remote sensing image and meteorological data to simulate the evapotranspiration of the study area from 1999 to 2016 by daily time step. The simulation results were compared with MODIS evapotranspiration product MOD16A2. The correlation coefficient R2 was 0.92 within the year， which verified the reliability of the simulation. The simulation results show that in temporal， the evapotranspiration is monomodal in the year (156.9 mm in spring， 302.5 mm in summer， 133.5 mm in autumn and 18.5 mm in winter)； the evapotranspiration presents fluctuating changes inter-annual， with a certain periodicity， and an overall upward trend. In the spatial distribution， the evapotranspiration distribution in the vegETtion area is higher， and differ in vegETtion types (broad>leaf>coniferous>farmland)， and evapotranspiration is different in different elevations (maximum within 500－700 m). According to correlation analysis， the variation of evapotranspiration within the year is significantly affected by temperature and solar radiation (P＜0.01)， and the annual variation is significantly affected by leaf area index and precipitation (P＜0.05).
崔 越,张利华,吴宗钒,符雅盛,马永明. 基于BEPS-Terrainlab v2.0模型鄂西犟河流域1999年—2016年蒸散发模拟分析[J]. 华中师范大学学报(自然科学版), 2020, 54(1): 140-148.
CUI Yue,ZHANG Lihua,WU Zongfan,FU Yasheng,MA Yongming. Simulation and analysis of evapotranspiration in Jiang River in western Hubei during 1999-2016 based on BEPS-Terrainlab v2.0 model. journal1, 2020, 54(1): 140-148.
2020, Vol. 54 
