2.2.2. Actual Evapotranspiration (ET)

Monthly MOD16A2 ET was used to analyze the change of hydrological factors. ET data from 2002 to 2014 were obtained from NASA/EOS (http://www.ntsg.umt.edu/) have a spatial resolution of 1.0 km<sup>2</sup> . The improved ET model [33] was applied rather than the Penman-Monteith equation to validate ET. The model has been widely used to calibrate the water cycle factors and their interactions with environmental change [33,34], although differences were observed between measurements and MOD16 data.
