Study of crop condition and assessment of agricultural drought in rabi season using IRS – AWiFS images
2008
C. S. MURTHY | M.V.R. SESHA SAI | V. BHANUJA KUMARI | V. S. PRAKASH | P. S. ROY
Although kharif season crops are more vulnerable to agricultural droughts due to uncertainty in monsoon rains, crops of rabi season grown under residual soil moisture and rainfed minor irrigation tanks are equally vulnerable to drought hazard. The present study was undertaken in Bagalkot district of north interior Karnataka to assess the extent of crop area affected by agricultural drought during rabi 2005-06, using Advanced Wide Field Sensor (AWiFS) images of Indian Remote Sensing Satellite, Resourcesat-1. Normalised Difference Vegetation Index (NDVI) images which represent density, health and vigour of crops were generated from satellite images and analyzed in association with cropping pattern, crop calendar, rainfall pattern and soil depth. The area affected by agricultural drought was delineated in each taluk. The study indicated the feasibility for detailed assessment of agricultural drought during rabi season on near real-time basis using the indigenously available AWiFS images.
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