Title :
Estimating actual evapotranspiration by means of remote sensing data and sap flow measurements in Pinus sylvestris forest stands in a mediterranean mountain region
Author :
Cristóbal, J. ; Ninyerola, M. ; Pons, X. ; Poyatos, R. ; Llorens, P.
Author_Institution :
Autonomous Univ. of Barcelona, Cerdanyola
Abstract :
The aim of this study is to monitor daily actual evapotranspiration (AETd) in Pinus sylvestris forest stands using a simplified methodology. To compute AETd we have followed the beta-method, which is based on the energy budget, using a series of TERRA/AQUA MODIS and Landsat-5 TM as Remote Sensing data from 2003 to 2004. We have compared Remote Sensing AETd estimates with sap flux measurements obtaining a RMSE of 0.78 mm in the case of Landsat data, 0.93 mm in the case of TERRA MODIS and 0.91 mm in the case of TERRA AQUA using a variable B parameter in AETd modeling.
Keywords :
evaporation; hydrology; remote sensing; transpiration; vegetation; AD 2003 to 2004; B-method; Landsat-5 TM; Mediterranean mountain region; Pinus sylvestris forest stands; TERRA-AQUA MODIS; actual evapotranspiration estimation; energy budget; remote sensing data; sap flow measurements; Atmospheric modeling; Fluid flow measurement; Geoscience; MODIS; Remote monitoring; Remote sensing; Satellites; Soil; Stress; Temperature sensors; Evapotranspiration modelling; Landsat; MODIS; Mediterranean region; Pinus sylvestris; Sap Flow;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2007. IGARSS 2007. IEEE International
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-1211-2
Electronic_ISBN :
978-1-4244-1212-9
DOI :
10.1109/IGARSS.2007.4423535
