Climate-induced shifts in irrigation water demand and supply during sensitive crop growth phases in South Asia

Qurat-ul-Ain Ahmad (), Eddy Moors (), Hester Biemans (), Nuzba Shaheen (), Ilyas Masih () and Muhammad Zia Rahman Hashmi ()
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Qurat-ul-Ain Ahmad: VU University Amsterdam
Eddy Moors: VU University Amsterdam
Hester Biemans: Wageningen University & Research
Nuzba Shaheen: Global Change Impact Studies Centre (GCISC), Ministry of Climate Change, overnment of Pakistan
Ilyas Masih: IHE Delft, Institute for Water Education
Muhammad Zia Rahman Hashmi: Ministry of Climate Change (MoCC), Government of Pakistan

Climatic Change, 2023, vol. 176, issue 11, No 6, 22 pages

Abstract: Abstract This study investigated the shifts in irrigation water demand and supply of the major staple and water-intensive crops (wheat and rice) in the Indus, Ganges and Brahmaputra (IGB) river basins of South Asia under the combined impacts of climate change and socio-economic development during the period 1981–2100. It explores irrigation water usage during climate-sensitive crop growth phases (i.e. vegetative and reproductive which required ~ 60% of the total seasonal (sowing to harvest) water demand), which is supposed to be crucial for long-term integrated crop water management. A hydrology vegetation model Lund Potsdam Jena Managed Land is forced with an ensemble of eight downscaled (5 arc-min) global climate model’s using the RCP (Representative concentration pathways) -SSP (Shared socio-economic pathways) framework, i.e. RCP4.5-SSP1 and RCP8.5-SSP3. To investigate phase-specific crop water projections, trend analysis is performed. It shows a significant (p

Keywords: Climate change; Phenology; Crop growth phases; Crop water demand; Groundwater irrigation (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1007/s10584-023-03629-7

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