Regional evapotranspiration estimation using SEBAL model with remotely sensed data in Guanzhong Plain and Weibei Tablelands
To some extent,the estimations of regional evapotranspiration using remotely sensed data could help researchers and decision makers to analyze regional crop water stress information,to estimate drought extent and water supply situation,and to make decisions on crop water management,especially for irrigation farming systems.In this paper,the Surface Energy Balance Algorithm for Land (SEBAL) is applied to retrieve land surface evapotranspiration in Guanzhong Plain and Weibei Tablelands by using Landsat TM data.After the preprocessing of the remotely sensed data and weather observation data,some algorithms of inversing the parameters under the SEBAL are developed locally.By using energy balance equation,latent heat flux during satellite overpass and the integrated daily fluxes in Guanzhong Plain and Weibei Tablelands are estimated.On the basis of the study area,some locally retrieved land surface parameters are used as inputs for the SEBAL.Spatial distributions of surface albedo,land surface temperature,as well as various energy fluxes are drawn.After parameter improvement,statistical analysis indicates that the operating results in Guanzhong Plain and Weibei Tablelands are simple and reasonable,also shows good application prospect of SEBAL.
SEBAL evapotranspiration estimation TM
XU Wen-ning WANG Peng-xin ZHANG Shu-yu
Department of Geographic Information Engineering,College of Information and Electrical Engineering,C Remote Sensing Information Center for Agriculture of Shaanxi Province,Xian 710015,PR China
国际会议
第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）