Hi Preeyaphorn,
My name is Marvin Baquero and I am a graduated student at the Central University of Venezuela, South-America. My mean interest is Hydrogeology but at the present I am studying Estimating evapotranspiration using remote sensing MODIS and SEBAL methodology by Dr. Richard G Allen (University of Idago). You can find it in this website http://www.idwr.state.id.us/gisdata/final_reports.htm
Well. I hope that this it can help you!
mbaquero75@yahoo.com