Impact assessment of climate change on the irrigation water need and conjunctive water use for future prospective

ABINASH DALAI; S. K. Jena

doi:10.56093/ijas.v95i10.158696

Authors

ABINASH DALAI ICAR-IIWM
Dr. S. K. Jena

https://doi.org/10.56093/ijas.v95i10.158696

Keywords:

Climate change, Conjunctive use of water sources, Groundwater table, Irrigation water demand

Abstract

Over the past two decades, the scientific community has given climate change and climatic variability a great deal of attention. In the present study, in eastern part of India, particularly in the coastal districts of Odisha, the research was carried out during kharif and rabi seasons of 2019-20 and 2020-21 in the Puri main canal system’s Phulnakhara distributary command, which shares portions of the Cuttack and Khurda districts in Odisha, having latitude from 20⁰19^’16’’ N to 20⁰14^’56’’ N and longitude from 85⁰ 52’ 52’’ E to 86⁰ 0’ 0’’ E. The impact of climate change was assessed by means of the irrigation water need in future both from the conjunctive use of water sources (surface and groundwater) in the study command area. Based on the prediction results it has been calculated that future irrigation water demand would be the highest in the year 2042-43 during kharif season and in the year 2044-45 during the rabi season, respectively. It was estimated that the decline in ground water table in kharif would be 1.23 to 1.42 m below ground level (BGL) and the decline in ground water table in rabi season would be 1.46 to 1.64 m BGL during the upcoming 30 years (2021-22 to 2050-51). So, the values of groundwater table declination would be the highest in 2042-43 and 2044-45 years for kharif and rabi seasons, respectively.

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Author Biography

ABINASH DALAI, ICAR-IIWM

Research Associate, ICAR-IIWM, PhD (SWE)

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