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Spatial mapping of agricultural water productivity using the SWAT model in Upper Bhima catchment, India

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Relation http://oar.icrisat.org/3844/
http://dx.doi.org/10.1002/ird.618
 
Title Spatial mapping of agricultural water productivity using the SWAT model in Upper Bhima catchment, India
 
Creator Garg, K K
Bharati, L
Gaur, A
George, B
Acharya, S
Jella, K
Narasimhan, B
 
Subject Watershed management
 
Description The Upper Bhima River Basin is facing both episodic and chronic water shortages due to intensive irrigation development. The main objective of this study was to characterize the hydrologic processes of the Upper Bhima River Basin and assess crop water productivity using the distributed hydrologic model, SWAT. Rainfall within the basin varies from 450 to 5000 mm in a period of 3–4 months. The basin has an average rainfall of 711 mm (32 400 Mm3 (million cubic metres)) in a normal year, of which 12.8% (4150 Mm3) and 21% (6800 Mm3) are captured by the reservoirs and groundwater reserves, respectively, 7% (2260 Mm3) exported as runoff out of the basin and the rest (63%) used in evapotranspiration. Agricultural water productivity for sugarcane, sorghum and millet were estimated as 2.90, 0.51 and 0.30 kg m−3, respectively, which were significantly lower than the potential and global maximum in the basin and warrant further improvement. Various scenarios involving different cropping patterns were tested with the goal of increasing economic water productivity values in the Ujjani Irrigation Scheme. Analysis suggests that maximization of the area by provision of supplemental irrigation to rainfed areas as well as better on-farm water management practices can provide opportunities for improving water productivity. Copyright © 2011 John Wiley & Sons, Ltd
 
Publisher John Wiley & Sons
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/3844/1/IrrigaDrain_61_60-79_2012.pdf
Garg, K K and Bharati, L and Gaur, A and George, B and Acharya, S and Jella, K and Narasimhan, B (2012) Spatial mapping of agricultural water productivity using the SWAT model in Upper Bhima catchment, India. Irrigation and Drainage, 61 (1). pp. 60-79. ISSN 1531-0353