Estimation of evapotranspiration using surface energy balance system and satellite datasets

Abstract

Study of actual evapotranspiration (ET) at regional scale is essential in order to facilitate proper irrigation practices. This chapter depicts the usage of satellite-based remote sensing data and Geographical Information System (GIS) for evaluating changes in actual evapotranspiration over the time-period of 20 years. This work implemented the use of Surface Energy Balance System (SEBS), a physically based model for estimation of turbulent heat transitions and territorial evapotranspiration at regional scale using RS techniques during winter season. This study was carried out using Landsat 8-OLI and Landsat-TM to achieve the desired objectives at study site of Chhatarpur and Panna zones of Madhya Pradesh, India. Actual ET estimated from the SEBS model was found to be significant and influenced by the land-use change that occurred during the 20 years’ time-period. Land-cover changes that occurred in 20 years duration affected the ET rate and may cause changes in irrigation practices in the study area. © 2021 Elsevier Inc. All rights reserved.