Abstract
Assessment of evapotranspiration is always a foremost element in water resources management. The consistent assessment of daily evapotranspiration provisions help decision makers to review the existing land use practices in terms of water management, while empowering them to recommend accurate land use changes. Earth observation satellite sensors are used in conjunction with Surface Energy Balance (SEB) models to overcome difficulties in obtaining daily evapotranspiration quantities on a regional scale. SEB System (SEBS) is used to estimate daily evapotranspiration and evaporative fraction over the Nile Delta along with Remote Sensing data acquired by different sensors and data from 15 in-situ meteorological stations. The consequential maps and the following correlation analysis show agreement, signifying SEBS' applicability and accurateness in the estimation of daily evapotranspiration over agricultural areas. Sensitivity analysis evaluates the influences of the inputs to the total uncertainty in the analysis outcomes. SEBS inputs parameters are interconnected. Interconnections between different biophysical parameters are anticipated, but the magnitude of the features sensitivity is uncertain. Four different biophysical parameters are involved to provide a comparative analysis of Gaussian process emulators for performing a global sensitivity analysis (GSA). Conclusions conducted from the current work are anticipated to contribute decisively towards an inclusive SEBS inputs parameter assessment of its overall verification.