A study on deriving daily evapotranspiration from remotely sensed instantaneous evapotranspiration based on the Gaussian fitting method

摘要

Evapotranspiration (ET) is crucial to water resource management, and regional ET is usually estimated by remote sensing. However, ET estimates through remote sensing are instantaneous values that need to be converted into daily totals. The study proposed the Gaussian fitting method to convert instantaneous ET retrieved by remote sensing into daily ET in Northwest China. Results showed that the Gaussian fitting method performed well. The simulated daily ET had high accuracy and had good agreement with measurements from EC stations, with an R