Author(s): Kalpesh Borse, Praveen Rathod, Vivek L. Manekar, Prasit G. Agnihotri
Linked Author(s): Kalpesh Borse
Keywords: NDVI, crop coefficient (Kc), evapotranspiration, Arc GIS, reference evapotranspiration
Abstract: This study demonstrates the determination of evapotranspiration using Gis and remote sensing. Landsat images of resolution 30m is used in the present study. Gridded Landsat images are available in eleven different bands, all bands are composited and processed for mosaic to form a single image for study area in Arc GIS 10. 1. After forming the mosaic, a single image is processed for the study area delineation. After delineating, masking is done to extract the exact study area. Obtained image is then processed for NDVI map in ERDAS Imagine 2014. Once the NDVI map is obtained based on the NDVI value, study area is classified into 5 different classes viz, Water Bodies, Agriculture Land, Built-up Land, Barren Land and Forest. Average value of NDVI is obtained in each classification. Using the NDVI, crop coefficient (Kc) is obtained for every class. In the present study to obtain reference evapotranspiration, Penman-Montieth model was used. From the Kc and Reference evapotranspiration actual evapotranspiration was calculated. Obtained results were validated using the actual ground truth data. It has been found that the results are showing good agreement with the actual result
Year: 2017