气候变化领域集成服务门户(CCPortal): Impacts of climate change on irrigation water requirements for rice-wheat cultivation in Bagmati River Basin; Nepal

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DOI	10.2166/wcc.2013.050
	Impacts of climate change on irrigation water requirements for rice-wheat cultivation in Bagmati River Basin; Nepal
	Shrestha S.; Gyawali B.; Bhattarai U.
发表日期	2013
ISSN	20402244
起始页码	422
结束页码	439
卷号	4 期号:4
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.
英文关键词	Climate change; CROPWAT modeling; Irrigation water requirements; Nepal; Physiographic regions; Rice-wheat cropping system
语种	英语
scopus关键词	Cropwat models; Irrigation water requirements; Nepal; Physiographic regions; Rice-wheat cropping systems; Climate change; Grain (agricultural product); Water; Watersheds; Irrigation; atmospheric general circulation model; climate change; climate effect; climatology; cultivation; irrigation; rice; river basin; wheat; Bagmati Basin; Nepal; Tarai
来源期刊	Journal of Water and Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/148301
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
推荐引用方式 GB/T 7714	Shrestha S.,Gyawali B.,Bhattarai U.. Impacts of climate change on irrigation water requirements for rice-wheat cultivation in Bagmati River Basin; Nepal[J],2013,4(4).
APA	Shrestha S.,Gyawali B.,&Bhattarai U..(2013).Impacts of climate change on irrigation water requirements for rice-wheat cultivation in Bagmati River Basin; Nepal.Journal of Water and Climate Change,4(4).
MLA	Shrestha S.,et al."Impacts of climate change on irrigation water requirements for rice-wheat cultivation in Bagmati River Basin; Nepal".Journal of Water and Climate Change 4.4(2013).