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Water Footprint Assessment of Rainfed Crops with Critical Irrigation under Different Climate Change Scenarios in SAT Regions .

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Title Water Footprint Assessment of Rainfed Crops with Critical Irrigation under Different Climate Change Scenarios in SAT Regions .
Not Available
 
Creator K.S.Reddy, V.Maruthi, P.K.Pankaj, Manoranjan Kumar, Pushpanjali, M.Prabhakar, A.G.K.Reddy, K.Sammi Reddy, V.K.Singh, A.Koradia .
 
Subject green and blue water footprint; crop evapotranspiration; effective rainfall; rainfed crops climate change; watershed
 
Description Not Available
Semi-Arid Tropical (SAT) regions are influenced by climate change impacts affecting the
rainfed crops in their productivity and production. Water Footprint (WF) assessment for rainfed
crops on watershed scale is critical for water resource planning, development, efficient crop planning,
and, better water use efficiency. A semi-arid tropical watershed was selected in lower Krishna river
basin having a 4700 ha area in Telangana, India. Soil andWater Assessment Tool (SWAT) was used
to estimate the water balance components of watershed like runoff, potential evapotranspiration,
percolation, and effective rainfall for base period (1994 to 2013) and different climate change scenarios
of Representative Concentration Pathways (RCP) 2.6, 4.5 and 8.5 for the time periods of 2020, 2050
and 2080. Green and blue WF of rainfed crops viz., maize, sorghum, groundnut, redgram and cotton
were performed by considering rainfed, and two critical irrigations (CI) of 30 mm and 50 mm. It
indicated that the effective rainfall (ER) is less than crop evapo-transpiration (ET) during crop growing
period under different RCPs, time periods, and base period. The green WF under rainfed condition
over different RCPs and time periods had decreasing trend for all crops. The study suggested that
in the rainfed agro-ecosystems, the blue WF can significantly reduce the total WF by enhancing
the productivity through critical irrigation management using on farm water resources developed
through rainwater harvesting structures. The maximum significant reduction in WF over the base
period was observed 13–16% under rainfed, 30–32% with 30 mm CI and 40–42% with 50 mm CI
by 2080. Development of crop varieties particularly in oilseeds and pulses which have less WF
and higher yields for unit of water consumed could be a solution for improving overall WF in the
watersheds of SAT regions.
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Date 2023-01-30T06:14:18Z
2023-01-30T06:14:18Z
2022
 
Type Research Paper
 
Identifier K.S.Reddy, V.Maruthi, P.K.Pankaj, Manoranjan Kumar, Pushpanjali, M.Prabhakar, A.G.K.Reddy, K.Sammi Reddy, V.K.Singh, A.Koradia .2022.Water Footprint Assessment of Rainfed Crops with Critical Irrigation under Different Climate Change Scenarios in SAT Regions .Water .14,1206. http://doi.org/10.3390/w14081206.
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/75845
 
Language English
 
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Publisher Not Available