干旱区生态环境知识资源中心(Arid): Spatial-Temporal Variability of Future Rainfall Erosivity and Its Impact on Soil Loss Risk in Kenya

Arid

DOI	10.3390/app11219903
	Spatial-Temporal Variability of Future Rainfall Erosivity and Its Impact on Soil Loss Risk in Kenya
	Watene, George; Yu, Lijun; Nie, Yueping; Zhang, Zongke; Hategekimana, Yves; Mutua, Felix; Ongoma, Victor; Ayugi, Brian
通讯作者	Yu, LJ (corresponding author), Chinese Acad Sci, Aerosp Informat Res Inst, Beijing 100101, Peoples R China.
来源期刊	APPLIED SCIENCES-BASEL
EISSN	2076-3417
出版年	2021
卷号	11 期号:21
英文摘要	Ongoing climate change poses a major threat to the soil resources of many African countries that mainly rely on an agricultural economy. While arid and semi-arid lands (ASALs) take up most of Kenya's land mass, approximately 64% of its total croplands lie within mountainous areas with high rainfall, hence, areas highly vulnerable to water erosion. Flooding of the Great Lakes and increasing desertification of the ASALs are illustrative cases of the implications of recent precipitation dynamics in Kenya. This study applied the Revised Universal Soil Loss Equation (RUSLE) to estimate future soil erosion rates at the national level based on four Coupled Model Intercomparison Project v5 (CMIP5) models under two Representative Concentration Pathway (RCP) scenarios. Results showed the current soil loss rate to be at 4.76 t ha(-1) yr(-1) and projected an increase in average rainfall erosivity under the two scenarios, except for RCP-2.6 (2030s) and (2080s) for the MIROC-5 model. Future projections revealed an incremental change in rainfall erosivity from the baseline climate by a cumulative average of 39.9% and 61.1% for all scenarios by the 2030s and 2080s, respectively, while soil loss is likely to increase concomitantly by 29% and 60%, respectively. The CCCMA_CANESM2 model under the RCP 8.5 (2080s) scenario projected the highest erosion rate of 15 t ha(-1) yr(-1) over Kenya, which is a maximum increase of above 200%, with the Rift Valley region recording an increase of up to 100% from 7.05 to 14.66 t ha(-1) yr(-1). As a first countrywide future soil erosion study, this assessment provides a useful reference for preventing water erosion and improving ecosystem service security.
英文关键词	soil erosion climate change erosivity R-factor GCMs RUSLE Kenya
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000726475900001
WOS关键词	CLIMATE-CHANGE ; CENTRAL HIGHLANDS ; MANAGEMENT FACTOR ; SEDIMENT YIELD ; RIFT-VALLEY ; LAND-USE ; EROSION ; RUNOFF ; WATER ; CATCHMENT
WOS类目	Chemistry, Multidisciplinary ; Engineering, Multidisciplinary ; Materials Science, Multidisciplinary ; Physics, Applied
WOS研究方向	Chemistry ; Engineering ; Materials Science ; Physics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/373726
作者单位	[Watene, George; Yu, Lijun; Nie, Yueping; Zhang, Zongke; Hategekimana, Yves] Chinese Acad Sci, Aerosp Informat Res Inst, Beijing 100101, Peoples R China; [Watene, George; Zhang, Zongke; Hategekimana, Yves] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Watene, George; Mutua, Felix] Jomo Kenyatta Univ Agr & Technol, Dept Geomat Engn & Geospatial Informat Syst, POB 62000, Nairobi 00200, Kenya; [Watene, George; Zhang, Zongke] Sino Africa Joint Res Ctr, POB 62000, Nairobi 00200, Kenya; [Ongoma, Victor] Mohammed VI Polytech Univ, Int Water Res Inst, Lot 660, Hay Moulay Rachid 43150, Ben Guerir, Morocco; [Ayugi, Brian] Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Key Lab Meteorol Disaster, Minist Educ, Nanjing 210044, Peoples R China
推荐引用方式 GB/T 7714	Watene, George,Yu, Lijun,Nie, Yueping,et al. Spatial-Temporal Variability of Future Rainfall Erosivity and Its Impact on Soil Loss Risk in Kenya[J],2021,11(21).
APA	Watene, George.,Yu, Lijun.,Nie, Yueping.,Zhang, Zongke.,Hategekimana, Yves.,...&Ayugi, Brian.(2021).Spatial-Temporal Variability of Future Rainfall Erosivity and Its Impact on Soil Loss Risk in Kenya.APPLIED SCIENCES-BASEL,11(21).
MLA	Watene, George,et al."Spatial-Temporal Variability of Future Rainfall Erosivity and Its Impact on Soil Loss Risk in Kenya".APPLIED SCIENCES-BASEL 11.21(2021).