气候变化领域集成服务门户(CCPortal): Analysis of rainfall trend and variability for agricultural water management in awash river Basin; Ethiopia

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DOI	10.2166/wcc.2016.044
	Analysis of rainfall trend and variability for agricultural water management in awash river Basin; Ethiopia
	Bekele D.; Alamirew T.; Kebede A.; Zeleke G.; Melese A.M.
发表日期	2017
ISSN	20402244
起始页码	127
结束页码	141
卷号	8 期号:1
英文摘要	The national economy and food security of many sub-Saharan countries relies on rain-fed agriculture, hence the impact of rainfall variability is highly significant. The intent of this study is to characterize rainfall variability and trend in Awash River Basin for agricultural water management using standard rainfall statistical descriptors. Long-term climate data of 12 stations were analyzed. Onset and cessation dates, length of growing period (LGP) and probability of dry spell occurrences were analysed using INSTAT Plus software. The Mann–Kendall test and the Sen’s slope method were used to assess the statistical significance of the trend. The results show high variability of rainfall (38–73%), LGP (30–38 days) and high probability of dry spell occurrence (up to 100%) during the Belg season (the short rainy season from March to May) compared with the Kiremt season (the main rainy season from June to September) in all stations. Belg season showed a non-significant decline trend in most of the stations, whereas the Kiremt season indicated the contrary. The finding also revealed that supplementary irrigation is vital, especially in the Belg season to cover up to 40% of the crop water requirement deficit. © IWA Publishing 2017.
英文关键词	Awash river basin; Ethiopia; Rainfall variability and trend; Supplemental irrigation
语种	英语
scopus关键词	Agriculture; Drought; Food supply; Irrigation; Precipitation (meteorology); Rain; Rivers; Water management; Watersheds; Agricultural water management; Crop water requirements; Ethiopia; Rainfall variability; River basins; Statistical descriptors; Statistical significance; Supplemental irrigation; Water resources; irrigation; rainfall; river basin; trend analysis; water management; Awash Basin; Ethiopia
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/148129
作者单位	Ethiopian Institute of Agricultural Research, Melkassa, P.O. Box 436, Adama, Ethiopia; Water and Land Resource Center, P.O. Box 3880, Addis Ababa, Ethiopia; Institute of Technology, Haramaya University, P.O. Box 138, Dire Dawa, Ethiopia; Department of Earth and the Environment, Florida International University, Miami, FL 33199, United States
推荐引用方式 GB/T 7714	Bekele D.,Alamirew T.,Kebede A.,et al. Analysis of rainfall trend and variability for agricultural water management in awash river Basin; Ethiopia[J],2017,8(1).
APA	Bekele D.,Alamirew T.,Kebede A.,Zeleke G.,&Melese A.M..(2017).Analysis of rainfall trend and variability for agricultural water management in awash river Basin; Ethiopia.Journal of Water and Climate Change,8(1).
MLA	Bekele D.,et al."Analysis of rainfall trend and variability for agricultural water management in awash river Basin; Ethiopia".Journal of Water and Climate Change 8.1(2017).