气候变化领域集成服务门户(CCPortal): Rainfall analysis for rain-fed farming in the great rift valley basins of Ethiopia

CCPortal

DOI	10.2166/wcc.2019.242
	Rainfall analysis for rain-fed farming in the great rift valley basins of Ethiopia
	Ademe F.; Kibret K.; Beyene S.; Mitike G.; Getinet M.
发表日期	2020
ISSN	20402244
起始页码	812
结束页码	828
卷号	11 期号:3
英文摘要	Rainfall is the most important source of water for crop production in Ethiopia. However, its temporal and spatial variability is leading to serious food shortages and insecurity in the country. This study was aimed at investigating the characteristics of selected agroclimatic variables over the great Rift Valley regions of Ethiopia. Long term (1981–2010) climate data were analyzed for 17 stations selected based on agroecology representation. Selected descriptors for climate variability and the Mann–Kendall trend test were employed. Onset, cessation, length of growing period (LGP), water requirement satisfaction index and dry spell occurrence during the growing period were determined. The results showed low to very high rainfall variability (14–35%), LGP (20–256 days) and dry spell probability (50–100%) during the main season. Significant (P < 0.05) annual and seasonal rainfall trends were observed in some stations. The probability of occurrence of a dry spell during the seasons was found to be a challenge for most of the stations in the mid and low altitude areas of the basins. Consequently, seasonal water deficit was observed in these areas which hampered crop production. Area specific recommendations are thus required based on specific challenges in the study region. © IWA Publishing 2020.
英文关键词	Dry spell; Rainfall variability; Seasonal water deficit
语种	英语
scopus关键词	Crops; Cultivation; Drought; Water resources; Climate variability; Probability of occurrence; Rain-fed farmings; Rainfall analysis; Rainfall variability; Seasonal rainfall; Temporal and spatial variability; Water requirements; Rain; crop production; precipitation assessment; precipitation intensity; rainfed agriculture; seasonal variation; spatiotemporal analysis; water resource; Kenya; Rift Valley
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/147909
作者单位	Melkasa Agricultural Research Center, P.O. Box 436, Adama, Ethiopia; Haramaya University, P.O. Box 138, Diredawa, Ethiopia; Hawassa University, P.O. Box 5, Hawassa, Ethiopia; Ethiopian Institute of Agricultural Research, P.O. Box 2003, Addis Ababa, Ethiopia
推荐引用方式 GB/T 7714	Ademe F.,Kibret K.,Beyene S.,et al. Rainfall analysis for rain-fed farming in the great rift valley basins of Ethiopia[J],2020,11(3).
APA	Ademe F.,Kibret K.,Beyene S.,Mitike G.,&Getinet M..(2020).Rainfall analysis for rain-fed farming in the great rift valley basins of Ethiopia.Journal of Water and Climate Change,11(3).
MLA	Ademe F.,et al."Rainfall analysis for rain-fed farming in the great rift valley basins of Ethiopia".Journal of Water and Climate Change 11.3(2020).