ESTIMATION OF CROP EVAPOTRANSPIRATION USING REMOTE SENSING AND GIS
Keywords:
Evapotranspiration, Remote Sensing, Net radiation, soil heat flux, Crop coefficientAbstract
The aim of project is to Estimate Crop Evapotranspiration (ETc) using Remote Sensing & GIS for
Laknavaram catchment area, Jayashankar Bhupalpally district, Telangana. Evapotranspiration is the important
component in hydrological cycle and it is a basic factor to compute water balance in order to estimate its requirements
and availability. In this project Crop coefficient method is used to estimate Actual ET for the laknavaram catchment
area by using RS & GIS. Crop water requirements are represented by the actual crop evapotranspiration. Estimation
of crop evapotranspiration (ETc) and crop coefficient using remote-sensing data is essential for planning the
irrigation water use in arid and semiarid regions. This study focuses on estimating the crop coefficient (Kc) and crop
Evapotranspiration (ETc) using satellite data integrated with the meteorological data and FAO-56 approach. This
study compute ET obtained from the satellite with other various empirical standards. In this project, Crop coefficient
method includes computing Net Radiation and soil heat flux to estimate ET. The result show that the values of ET in
built up areas are low when compared with the vegetation & water surface. These processes to estimate ET are
efficient and accurate.
