... Results and discussion From the land cover data and vegetation-related parameters in the Nong Son catchment, and the monthly meteorological data at the Tra My climate station for the period ... evapotranspiration estimation and its effect on hydrological model response at the Nong Son Basin Vu Van Nghi1,*, Do Duc Dung2, Dang Thanh Lam2 1 State Key Laboratory of Hydrology, Water ... The potential evapotranspiration can be directly calculated by the Penman-Monteith equation, known as the one-step method. The approach requires data on the land cover and related-vegetation...