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ESTIMATION AND COMPARISON OF EVAPOTRANSPIRATION FROM MULTIPLE SATELLITES FOR CLEAR SKY DAYS

BATRA, NAMRATA
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1116962910

Abstract Details

2005, MS, University of Cincinnati, Engineering : Environmental Engineering.
Many water resources and agricultural applications require the knowledge of evapotranspiration (ET) over a range of spatial and temporal scales. Satellite remote sensing provides an unprecedented spatial coverage of land surface and atmospheric data that are logistically and economically impossible to obtain through ground based observation networks. This study is focused on ascertaining the feasibility and robustness of using newly launched sensors for the continuous monitoring capability of ET for hydrology, climatology, agronomy and ecology studies. The estimation of ET is based on a modified Priestley-Taylor equation developed by Jiang & Islam (2001), where all parameters can be derived independently using primarily remote sensing data. Important thermodynamic and physical information is revealed by the combination of remotely sensed normalized difference vegetation index (NDVI) and land surface temperature (To). The scatter plot of NDVI and To parameters form a characteristic triangular pattern whose boundaries are interpreted as limiting surface fluxes. We explore the robustness of Jiang-Islam methodology by doing an extensive inter-comparison of spatially distributed parameters derived from MODIS and AVHRR sensors onboard EOS Terra, NOAA14 and NOAA16 satellites respectively. Spatially distributed net radiation maps were retrieved using Bisht et al., (2005) methodology as an estimate of available energy to get both the spatial and temporal distribution maps of ET for clear sky days. We demonstrate the utility of newly launched sensors by validating the estimated ET results to ground flux stations of Southern Great Plains (SGP) with standard error of about 22% and correlation of 0.82.
Dr. Shafiqul Islam (Advisor)
151 p.
Remote Sensing
Evapotranspiration; MODIS; AVHRR

Recommended Citations

Citations

  • BATRA, N. (2005). ESTIMATION AND COMPARISON OF EVAPOTRANSPIRATION FROM MULTIPLE SATELLITES FOR CLEAR SKY DAYS [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1116962910

    APA Style (7th edition)

  • BATRA, NAMRATA. ESTIMATION AND COMPARISON OF EVAPOTRANSPIRATION FROM MULTIPLE SATELLITES FOR CLEAR SKY DAYS. 2005. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1116962910.

    MLA Style (8th edition)

  • BATRA, NAMRATA. "ESTIMATION AND COMPARISON OF EVAPOTRANSPIRATION FROM MULTIPLE SATELLITES FOR CLEAR SKY DAYS." Master's thesis, University of Cincinnati, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1116962910

    Chicago Manual of Style (17th edition)

ucin1116962910
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© 2005, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.