Vol. 12, Issue 4 (2023)

Author(s):
Anjana Chettri and JL Chaudhary

Abstract:
A research study was undertaken to evaluate reference evapotranspiration (ETₒ) along with their trends in different districts of Chhattisgarh, India using 28 years (1991-2019) long term data during 2021-2022. Bastar district observed highest annual ETₒ while lowest in Mungeli district. kharif and rabi ETₒ was observed to be highest in Bilaspur and Balodabazar districts, respectively while lowest in Kanker and Koriya districts, respectively. Highest ETₒ variability recorded was during kharif season as 4.3%. The results also showed that the magnitude of negative trends in the annual ETₒ series ranged from (-) 1.469 to (-) 2.852 mm year^-1 while positive trends ranged between (+) 2.670 to (+) 2.143 mm year^-1. The analysis also revealed that kharif ETₒ in Chhattisgarh decreased at an average rate of (-) 0.510 to (-) 0.490 mm year^-1. ETₒ values during the rabi season decreased at a rate of (-) 0.948 to (-) 0.368 mm year^-1, respectively.