期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2014
期号：VISHWATECH
页码：130
出版社：S&S Publications
摘要：As evapotranspiration is one of the main components of hydrologic cycle, its estimation is very important.Remote sensing technologies can assist to improve the estimation accuracy also providing means for computingevapotranspiration geographical distribution. In the present study, the daily actual evapotranspiration was calculated forwheat crop in Rabi season during the crop growth cycle uniformly. FAO Penman-Monteith method adapted to satellitedata was used for the estimation of actual crop evapotranspiration for wheat crop using satellite data together withground meteorological measurements. Satellite data, following the necessary processing, were used in conjunction withsurface data from the nearest meteorological station. The IRS LISS-III satellite images were used to calculate, albedoNDVI and LAI required for the estimation of actual crop evapotranspiration (ETc) for wheat crop. The actual cropevapotranspiration for wheat crop varied from 0.95 to 3.43 mm/day during the crop growth period. The ETc valuesestimated from satellite data by direct application of FAO Penman Monteith method are on an average 16.54% lowerthan ETc values estimated as multiplication of Kc from lysimeter data and ETr from meteorological data. It is obviousthat ETc sourcing from IRS LISS-III and meteorological data is always less than that of the FAO. The reason for thiscould be the low resolution of IRS LISS-III pixel. The difference is insignificant, when both the values were comparedwith t-test for paired two sample means.
