Estimation of the potential evapotranspiration using data of volumetric lysimeter for Chhattisgarh plain agroclimatic zone

Abstract

An accurate determination of evapotranspiration is required for many studies that involve estimation of the water balance. One methodology is the use of lysimeters. Considering for the Chhattisgarh plain agroclimatic zone the volumetric lysimeter was used for calculating daily E To from January 1993 to December 2016. The volumetric lysimeter provided rapid, reliable, and field-transferable research information. This provided us with the statistical power to compare variables of interest to study the interaction of water quality and quantity on plant ET. Data obtained from the VLS during the cultivation of rice for respective years. The objective of this study is to estimate the Measured PET on weekly, monthly, seasonal as well as annual basis. The highest measured PET found high in 24th SMW indicates the high water demand of crop. As in the monthly and seasonal basis the maximum measured PET observed in the March month and in pre-monsoon season which indicates the high PET occurred in this time span.