Evaluation of crop water demand for sustainable crop production using geospatial tools in a canal command of West Bengal

Authors

  • Laishram Kanta Singh KVK Imphal West, ICAR Research Complex for NEH Region, Manipur Centre
  • Madan K. Jha AgFE Department, IIT Kharagpur 721 302, West Bengal
  • V.M. Chowdary Regional Remote Sensing Centre-North, NRSC Delhi 110 049
  • Srikanta Sannigrahi Department of Architecture and Regional Planning, IIT Kharagpur 721 302

DOI:

https://doi.org/10.54386/jam.v21i4.277

Keywords:

Reference cvapotranspiration, NDVI, fraction of vegetation cover, normal year, crop water demand

Abstract

The agricultural sector is the primary consumer of water resources around the world, and the need for additional food production for growing population further exerts more pressure on water resources. In this study, crop water demand was assessed spatially and temporally for a case study area, Damodar Canal Command (DCC) using geospatial techniques. Crop evapotranspiration was estimated for all the crop seasons using reference evapotranspiration and Fraction of Vegetation cover (FV) that was used as a surrogate for crop coefficient. The reference evapotranspiration (ET ) was calculated using the FAO o Penman-Monteith method. FV was computed based on Normalized Difference Vegetation Index (NDVI) derived from MODIS satellite imagery and its value ranges from 0 to 1. The maximum and minimum reference evapotranspiration values were estimated as 8.44 and 1.88 mmday-1 in May and September, respectively during the normal year 2004. The average monthly crop water demand was maximum in May i.e. 8.08 mmday-1. Among all crop seasons, Boro season has the maximum crop water demand followed by Aus and Aman seasons with maximum ET as 496, 438 and 328 mm, respectively. Total annual crop c water demand for normal year, 2004 was estimated at 1237 mmyr-1 in the study area. Spatially and temporally distributed crop water demand estimates help the irrigation planners to devise the strategies for effective irrigation management.

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Published

01-12-2019

How to Cite

Laishram Kanta Singh, Madan K. Jha, V.M. Chowdary, & Srikanta Sannigrahi. (2019). Evaluation of crop water demand for sustainable crop production using geospatial tools in a canal command of West Bengal. Journal of Agrometeorology, 21(4), 427–433. https://doi.org/10.54386/jam.v21i4.277

Issue

Vol. 21 No. 4 (2019): December

Section

Research Paper

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