Rice Water Productivity Mapping in Lawan Canal Command using CROPWAT Model and Geospatial Technique

Fanesh Kumar Sahu; Jitendra Sinha; Susanta Kumar Jena; ABINASH DALAI

doi:10.56093/ijas.v96i10.175304

Authors

Dr. Fanesh Kumar ICAR-Indian Institute of Water Management, Bhubaneswar, Odisha
Dr. Jitendra Sinha Indira Gandhi Agriculture University, Raipur-492012
Dr. Susanta Kumar Jena ICAR-Indian Institute of Water Management, Bhubaneswar, Odisha
DR. ABINASH DALAI ICAR-Indian Institute of Water Management, Bhubaneswar, Odisha

https://doi.org/10.56093/ijas.v96i10.175304

Keywords:

Consumptive water use, Crop production, Evapotranspiration, Water productivity

Abstract

Water demand has been increasing rapidly as a result of population growth and rising standards of living in our societies, resulting in a major problem with water scarcity. There is an immense need for enhancing per drop more crop.The present study focuses on rice water productivity mapping of Lawan Command Area (LCA) using CROPWAT 8.0 model and Geographical Information System (GIS). 20 years meteorological data (2002-2021) and crop coefficient (K_c) of rice at different crop growth stages were analyzed to estimate crop evapotranspiration (ET_c). The results indicate that 20 years average crop water productivity (CWP) in the entire command area was found to be 0.61 kgm^-3, varying from 0.26 kgm^-3(lowest)in the year 2017 to 0.74 kgm^-3 (highest) in the year 2007. Average field water productivity (FWP, considering percolation losses) in the command area was found to be as 0.34 kgm^-3. Similarly, for 13 different villages in the study area over the average of two decades, the highest CWP was found to be as 0.626 kgm^-3 in the village Sundry, while the lowest was found to be as 0.578 kgm^-3 in village Harinbatta. The highest FWP was found as 0.352 kgm^-3 in village Sundry, while the lowest was found as 0.325 kgm^-3 in village Harinbatti. There is a significant difference between CWP and FWP, which calls for urgent actions to reduce losses in the field.

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Author Biographies

Dr. Fanesh Kumar, ICAR-Indian Institute of Water Management, Bhubaneswar, Odisha

Senior Research Fellow, ICAR-Indian Institute of Water Management, Bhubaneswar, Odisha
Dr. Jitendra Sinha, Indira Gandhi Agriculture University, Raipur-492012

Dean & Professor, Indira Gandhi Agriculture University, Raipur-492012
Dr. Susanta Kumar Jena, ICAR-Indian Institute of Water Management, Bhubaneswar, Odisha

Principal Scientist (SWCE),

ICAR-Indian Institute of Water Management, Bhubaneswar, Odisha
DR. ABINASH DALAI, ICAR-Indian Institute of Water Management, Bhubaneswar, Odisha

Research Associate,

ICAR-Indian Institute of Water Management, Bhubaneswar, Odisha

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