HR: 14:55h
AN: H43H-06    [Abstracts]
TI: Estimating Riparian ET through Remote Sensing
AU: * Samani, Z
EM: zsamani@nmsu.edu
AF: New Mexico State University, Box 3CE, Hernandez Hall, Las Cruces, NM 88003 United States
AU: Bawazir, S
EM: Abawazir@nmsu.edu
AF: New Mexico State University, Box 3CE, Hernandez Hall, Las Cruces, NM 88003 United States
AU: Bleiweiss, M
EM: mbleiwei@taipan.nmsu.edu
AF: New Mexico State University, Box 3CE, Hernandez Hall, Las Cruces, NM 88003 United States
AU: Skaggs, R
EM: rskaggs@nmsu.edu
AF: New Mexico State University, Box 3CE, Hernandez Hall, Las Cruces, NM 88003 United States
AU: Schmugge, T
EM: tschmugge@nmsu.edu
AF: New Mexico State University, Box 3CE, Hernandez Hall, Las Cruces, NM 88003 United States
AB: Riparian evapotranspiration (ET) along the Rio Grande River has become a major hydrological as well as political issue in New Mexico. The State of New Mexico has spent millions of dollars in recent years to eradicate riparian vegetation without being able to quantify the change in regional ET. Many studies have focused on measuring evapotranspiration of individual riparian vegetation types, mainly saltcedar and native cottonwood. However, the riparian vegetation on the Middle Rio Grande varies in density and species.. Spatial variation in climate, soil type and depth to groundwater causes variation in ET, as well. It is obvious that in order to obtain more accuracy in measurements, multiple sampling points are needed; thus, making the process costly and impractical An alternative solution, which is also cost-effective, is measuring ET by using remote sensing technology. Remote sensing combines regional satellite data with localized ET measurement to calculate regional ET. REEM (Regional ET Estimation Model) is a process that uses the energy balance at the top of the canopy to estimate ET. REEM has been using ASTER images for values of surface temperature, albedo and NDVI to calculate net radiation (Rn), ground heat flux (G) and sensible heat flux (H). The ET is then calculated as residual of the energy components. The REEM model is being used to calculate regional ET values for the Riparian vegetation of the Middle Rio Grande. The paper compares the ET values for various vegetation types using remote sensing and ET derived from Eddy Covariance Flux Towers.
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0400 BIOGEOSCIENCES
DE: 1640 Remote sensing (1855)
DE: 1818 Evapotranspiration
DE: 3322 Land/atmosphere interactions (1218, 1631, 1843)
SC: Hydrology [H]
MN: Fall Meeting 2005