Title :
Estimation of evapotransipiration of grassland and cropland ecosystems in arid region based on MODIS satellite data and Penman-Monteith equation
Author :
Haibo Wang ; Mingguo Ma ; Wenping Yu ; Guanghui Huang
Author_Institution :
Cold & Arid Regions Environ. & Eng. Res. Inst. (CAREERI), Lanzhou, China
Abstract :
Remotely sensed data have long been seen as the best way to determine spatially distributed evapotranspiration (ET) fluxes owing to their spatial and temporal continuity. A simple biophysical model by using remotely sensed leaf area index data and the Penman-Monteith (PM) equation was introduced to calculate daily ET of grassland and farmland in the middle and upper reaches of Heihe River Basin. The modelled daily ET agrees well with measurements and the R2 is over 0.80. This study confirmed that the PM equation with MODIS LAI can provide reliable estimates of ET at daily time scales and with different ecosystems in arid and cold regions.
Keywords :
crops; ecology; evaporation; transpiration; vegetation mapping; China; Heihe River Basin; MODIS LAI; MODIS satellite data; Penman-Monteith equation; arid region; biophysical model; cold region; cropland ecosystem; daily evapotranspiration; daily time scales; farmland; grassland ecosystem; middle reaches; remotely sensed leaf area index data; spatial continuity; spatially distributed evapotranspiration fluxes; temporal continuity; upper reaches; Biological system modeling; Data models; Equations; MODIS; Mathematical model; Remote sensing; Vegetation mapping; Arid region; MODIS leaf area index; Penman-Monteith equation; evapotransipiration;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2013 IEEE International
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4799-1114-1
DOI :
10.1109/IGARSS.2013.6723139
