Comparison of different complementary relationship models for estimating regional evapotranspiration

Based on the observational data, we validate these complementary relationship models such as advection-aridity model, CRAE model and Granger model on the point and region scale. It was showed that complementary relationship models perform well over winter wheat fields, but rather differently over grassland. With the exception of several extreme arid years, annual errors of simulated evapotranspirations by Advection-Aridity model, CRAE model and Granger model were less than 10% in the Yellow River Basin on a monthly base.