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Water Erosion Risk Assessment in the Kenya Great Rift Valley Region

文献类型：期刊论文

作者Watene, George1,2,3,5; Yu, Lijun1; Nie, Yueping1; Zhu, Jianfeng1,3; Ngigi, Thomas2,5; Nambajimana, Jean de Dieu3,4; Kenduiywo, Benson2
刊名SUSTAINABILITY
出版日期2021
卷号13期号:2页码:844
关键词soil erosion Great Rift Valley Lakes ASAL Kenya desertification
DOI10.3390/su13020844
产权排序5
通讯作者Yu, Lijun(yulj@radi.ac.cn)
文献子类Article
英文摘要The Kenya Great Rift Valley (KGRV) region unique landscape comprises of mountainous terrain, large valley-floor lakes, and agricultural lands bordered by extensive Arid and Semi-Arid Lands (ASALs). The East Africa (EA) region has received high amounts of rainfall in the recent past as evidenced by the rising lake levels in the GRV lakes. In Kenya, few studies have quantified soil loss at national scales and erosion rates information on these GRV lakes' regional basins within the ASALs is lacking. This study used the Revised Universal Soil Loss Equation (RUSLE) model to estimate soil erosion rates between 1990 and 2015 in the Great Rift Valley region of Kenya which is approximately 84.5% ASAL. The mean erosion rates for both periods was estimated to be tolerable (6.26 t ha(-1) yr(-1) and 7.14 t ha(-1) yr(-1) in 1990 and 2015 respectively) resulting in total soil loss of 116 Mt yr(-1) and 132 Mt yr(-1) in 1990 and 2015 respectively. Approximately 83% and 81% of the erosive lands in KGRV fell under the low risk category (<10 t ha(-1) yr(-1)) in 1990 and 2015 respectively while about 10% were classified under the top three conservation priority levels in 2015. Lake Nakuru basin had the highest erosion rate net change (4.19 t ha(-1) yr(-1)) among the GRV lake basins with Lake Bogoria-Baringo recording annual soil loss rates >10 t ha(-1) yr(-1) in both years. The mountainous central parts of the KGRV with Andosol/Nitisols soils and high rainfall experienced a large change of land uses to croplands thus had highest soil loss net change (4.34 t ha(-1) yr(-1)). In both years, forests recorded the lowest annual soil loss rates (<3.0 t ha(-1) yr(-1)) while most of the ASAL districts presented erosion rates (<8 t ha(-1) yr(-1)). Only 34% of all the protected areas were found to have erosion rates <10 t ha(-1) yr(-1) highlighting the need for effective anti-erosive measures.
电子版国际标准刊号2071-1050
资助项目National Key Research and Development Project of China[2020YFC1521900] ; National Key Research and Development Project of China[2020YFC1521901] ; National Key Research and Development Program[2014A8007007020] ; China Scholarship Council through Sino-Africa Joint Research Centre[2014GXYB33]
WOS研究方向Science & Technology - Other Topics ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000611781100001
出版者MDPI
资助机构National Key Research and Development Project of China ; National Key Research and Development Program ; China Scholarship Council through Sino-Africa Joint Research Centre
源URL[http://ir.imde.ac.cn/handle/131551/55837]  
专题中国科学院水利部成都山地灾害与环境研究所
通讯作者Yu, Lijun
作者单位1.Chinese Acad Sci, Aerosp Informat Res Inst, Beijing 100101, Peoples R China
2.Jomo Kenyatta Univ Agr & Technol, Dept Geomat Engn & Geospatial Informat Syst, POB 62000-00200, Nairobi, Kenya
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
5.Sino Africa Joint Res Ctr, POB 62000-00200, Nairobi, Kenya
推荐引用方式
GB/T 7714		 Watene, George,Yu, Lijun,Nie, Yueping,et al. Water Erosion Risk Assessment in the Kenya Great Rift Valley Region[J]. SUSTAINABILITY,2021,13(2):844.
APA Watene, George.,Yu, Lijun.,Nie, Yueping.,Zhu, Jianfeng.,Ngigi, Thomas.,...&Kenduiywo, Benson.(2021).Water Erosion Risk Assessment in the Kenya Great Rift Valley Region.SUSTAINABILITY,13(2),844.
MLA Watene, George,et al."Water Erosion Risk Assessment in the Kenya Great Rift Valley Region".SUSTAINABILITY 13.2(2021):844.

入库方式： OAI收割

来源：成都山地灾害与环境研究所

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