Spatio-temporal Variability of Reference Evapotranspiration and Trend Analyze of Crop Water Requirement
Ronald Mayengbam
*
Department of Environmental Sciences and NRM, College of Forestry, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj, Uttar Pradesh, 211007, India.
Shraddha Rawat
Department of Environmental Sciences and NRM, College of Forestry, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj, Uttar Pradesh, 211007, India.
*Author to whom correspondence should be addressed.
Abstract
The study was aimed to analyse the trend of Reference Evapotranspiration (ETo) for estimation of Crop Water Requirement (CWR) for Rice (Oryza sativum) cultivation in Manipur from 2011-2021 in 16 districts (Bisnupur, Churachandpur, Jiribam, Imphal East, Kamjong, Senapati, Imphal West, Tengnoupal, Ukhrul, Thoubal, Noney, Pherzwal, Chandel, Kakching, Tamenglong and Kangpokpi) ETo and CWR was estimated using CROPWAT. Spatial trends of climate variables were analysed using Mann– Kendall test and Sen’s slope estimator.
Keywords: Crop water requirement, cropwat, rice, reference evapotranspiration, rice cultivation