Spatial distribution and change trend of land surface evaporation and drought in Sichuan Province (China) during 2001 to 2015

With the rapid development of economic situation, global warming and population growing, drought happened in many areas. Based on linear dual source remote sensing model we establish the modified hybrid linear dual-source's remote sensing evaporation model to simulate the Sichuan Province actual evaporation. Then we calculate the potential evaporation by using the Hargreaves formula. In addition, we analyze evaporation and drought trend of Sichuan province. This study showed that: (1) the actual variation trend of evaporation in Sichuan Province is decreasing from 2001 to 2015. The actual evaporation in the east is higher than that in the west regions, and in the south is higher than that in the north regions. (2) The value of potential evaporation fluctuates is not obviously in every season. According to the spatial distribution, the potential evaporation distribution is decreasing from south to north. (3) The evaporation of drought index shows an upward trend, but the fluctuation phenomenon of Sichuan Province in the past seasons is not obvious. This climate research provide the basis for the prediction and guidance of agricultural activities in the region.