globalchange  > 气候变化事实与影响
DOI: 10.5194/hess-20-1971-2016
Scopus记录号: 2-s2.0-84969753192
论文题名:
Crop-specific seasonal estimates of irrigation-water demand in South Asia
作者: Biemans H; , Siderius C; , Mishra A; , Ahmad B
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2016
卷: 20, 期:5
起始页码: 1971
结束页码: 1982
语种: 英语
Scopus关键词: Atmospheric thermodynamics ; Crops ; Food supply ; Land use ; Plants (botany) ; Water ; Water resources ; Changing climate ; Global water resources ; Irrigation waters ; Level statistics ; Model-based OPC ; Seasonal patterns ; Vegetation model ; Water availability ; Irrigation ; climate change ; crop yield ; demand analysis ; double cropping ; estimation method ; food production ; food security ; headwater ; land use ; river basin ; water availability ; water demand ; water resource ; water stress ; South Asia
英文摘要: Especially in the Himalayan headwaters of the main rivers in South Asia, shifts in runoff are expected as a result of a rapidly changing climate. In recent years, our insight into these shifts and their impact on water availability has increased. However, a similar detailed understanding of the seasonal pattern in water demand is surprisingly absent. This hampers a proper assessment of water stress and ways to cope and adapt. In this study, the seasonal pattern of irrigation-water demand resulting from the typical practice of multiple cropping in South Asia was accounted for by introducing double cropping with monsoon-dependent planting dates in a hydrology and vegetation model. Crop yields were calibrated to the latest state-level statistics of India, Pakistan, Bangladesh and Nepal. The improvements in seasonal land use and cropping periods lead to lower estimates of irrigation-water demand compared to previous model-based studies, despite the net irrigated area being higher. Crop irrigation-water demand differs sharply between seasons and regions; in Pakistan, winter (rabi) and monsoon summer (kharif) irrigation demands are almost equal, whereas in Bangladesh the rabi demand is ∼ 100 times higher. Moreover, the relative importance of irrigation supply versus rain decreases sharply from west to east. Given the size and importance of South Asia improved regional estimates of food production and its irrigation-water demand will also affect global estimates. In models used for global water resources and food-security assessments, processes like multiple cropping and monsoon-dependent planting dates should not be ignored. © 2016 Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78841
Appears in Collections:气候变化事实与影响

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作者单位: Wageningen University, Research Centre, Wageningen, Netherlands; Environmental Economics and Natural Resources Group, Wageningen University, Wageningen, Netherlands; Agricultural and Food Engineering Department, IIT Kharagpur, Kharagpur, India; Pakistan Agricultural Research Council, Islamabad, Pakistan

Recommended Citation:
Biemans H,, Siderius C,, Mishra A,et al. Crop-specific seasonal estimates of irrigation-water demand in South Asia[J]. Hydrology and Earth System Sciences,2016-01-01,20(5)
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