DOI: 10.2166/wcc.2013.050
论文题名: Impacts of climate change on irrigation water requirements for rice-wheat cultivation in Bagmati River Basin, Nepal
作者: Shrestha S. ; Gyawali B. ; Bhattarai U.
刊名: Journal of Water and Climate Change
ISSN: 20402244
出版年: 2013
卷: 4, 期: 4 起始页码: 422
结束页码: 439
语种: 英语
英文关键词: Climate change
; CROPWAT modeling
; Irrigation water requirements
; Nepal
; Physiographic regions
; Rice-wheat cropping system
英文摘要: This study highlights the spatial and temporal impacts of climate change on rice-wheat cropping systems, focusing on irrigation water requirement (IWR) in the Bagmati River Basin of Nepal. The outputs from a general circulation model (HadCM3) for two selected scenarios (A2 and B2) of IPCC and for three time periods (2020s, 2050s, and 2080s) have been downscaled and compared to a baseline climatology. CROPWAT 8.0 model is used to estimate the water requirements. IWRs show different trends in different physiographic regions and different growth stages of rice and wheat. A decreasing trend of IWRs in the Mid Hills and the High Hills indicates that farmer-based small irrigation schemes are sufficient to meet the requirements. However, in the Terai region, where there is an increasing trend in IWRs, the deficit volume of water needs to be supplied from potential large-scale irrigation schemes. © IWA Publishing 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67727
Appears in Collections: 气候减缓与适应
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作者单位: Water Engineering and Management, School of Engineering and Technology, Asian Institute of Technology, P. O. Box 4 Klong Luang, Pathumthani 12120, Thailand
Recommended Citation:
Shrestha S.,Gyawali B.,Bhattarai U.. Impacts of climate change on irrigation water requirements for rice-wheat cultivation in Bagmati River Basin, Nepal[J]. Journal of Water and Climate Change,2013-01-01,4(4)