Application of SEBAL and Ts/VI Trapezoid Models for Estimating Actual Evapotranspiration in the Algerian Semi-Arid Environment to Improve Agricultural Water Management
Open Access
- 1 June 2021
- journal article
- research article
- Published by FapUNIFESP (SciELO) in Revista Brasileira de Meteorologia
- Vol. 36 (2), 219-236
- https://doi.org/10.1590/0102-77863610020
Abstract
Accurate spatio-temporal estimation of evapotranspiration (ET) and surface energy fluxes is crucial for many agro-environmental applications, including the determination of water balance, irrigation scheduling, agro-ecological zoning, simulation of global changes in land use and forecasting crop yields. Remote sensing based energy balance models are presently most suitable for estimating ET at both temporal and spatial scales. This study presents an intercomparison of ET maps over the Habra plain in western Algeria obtained with two different models: Ts/VI trapezoid (Surface temperature/Vegetation Index Trapezoid Model) and SEBAL (Surface Energy Balance Algorithm for Land). Ts/VI trapezoid is the most used model, due to its simplicity, ease of use, few data input requirements and relatively high accuracy. It allows estimating ET directly by using the Priestley-Taylor equation. Whereas SEBAL allows estimating ET as the residual term of the energy balance equation, by using a rather complex hot and cold pixel based contextual approach to internally calibrate sensible heat flux through an iterative approach. The data set consists of four Landsat-8 OLI/TIRS images acquired on 2018-2019 and some ground measurements. In conclusion, the results show that SEBAL and Ts/VI trapezoid models provide comparable outputs and suggest that both the two models are suitable approaches for ET mapping over agricultural areas where ground measurements are scarce or difficult to collect.Keywords
This publication has 48 references indexed in Scilit:
- Obtaining evapotranspiration and surface energy fluxes with remotely sensed data to improve agricultural water managementAfrican Journal of Food, Agriculture, Nutrition and Development, 2011
- Reviewing SEBAL input parameters for assessing evapotranspiration and water productivity for the Low-Middle São Francisco River basin, Brazil: Part A: Calibration and validationAgricultural and Forest Meteorology, 2009
- Evaluating evapotranspiration rates and surface conditions using Landsat TM to estimate atmospheric resistance and surface resistanceRemote Sensing of Environment, 2002
- A simple interpretation of the surface temperature/vegetation index space for assessment of surface moisture statusRemote Sensing of Environment, 2002
- The Surface Energy Balance System (SEBS) for estimation of turbulent heat fluxesHydrology and Earth System Sciences, 2002
- SEBAL-based sensible and latent heat fluxes in the irrigated Gediz Basin, TurkeyJournal of Hydrology, 2000
- A remote sensing surface energy balance algorithm for land (SEBAL). 1. FormulationJournal of Hydrology, 1998
- Effect of Vegetation Density on the Parameterization of Scalar Roughness to Estimate Spatially Distributed Sensible Heat FluxesWater Resources Research, 1996
- Diagnosis of regional evaporation by remote sensing to support irrigation performance assessmentIrrigation and Drainage Systems, 1996
- An Experiment with an Advanced Surface Parameterization in a Mesobeta-Scale Model. Part I: ImplementationMonthly Weather Review, 1991