Land Use Change Impacts on Water Erosion in Rwanda

doi:10.3390/su12010050

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Land Use Change Impacts on Water Erosion in Rwanda
	Nambajimana Jean de Dieu 3,4; He Xiubin 4; Zhou Ji 4; Justine Meta Francis 2,3; Li Jinlin 3,4; Khurram Dil 3,4; Mind'je Richard 1,3; Nsabimana Gratien 2,4
刊名	SUSTAINABILITY
	2020
卷号	12 期号:1 页码:50
关键词	land use change erosion-prone lands water erosion RUSLE soil conservation
DOI	10.3390/su12010050
通讯作者	He, Xiubin(xiubinh@imde.ac.cn)
产权排序	1
文献子类	Article
英文摘要	Rwanda has experienced accelerated soil erosion as a result of unsustainable human activities and changes in land use. Therefore, this study aimed at applying the RUSLE (Revised Universal Soil Loss Equation) model using GIS (Geographical Information System) and remote sensing to assess water erosion in Rwanda, focusing on the erosion-prone lands for the time span 2000 to 2015. The estimated mean annual soil losses were 48.6 t ha(-1) y(-1) and 39.2 t ha(-1) y(-1) in 2000 and 2015, respectively, resulting in total nationwide losses of approximately 110 and 89 million tons. Over the 15 years, 34.6% of the total area of evaluated LULC (land use/land cover) types have undergone changes. The highest mean soil loss of 91.6 t ha(-1) y(-1) occurred in the area changing from grassland to forestland (0.5%) while a mean soil loss of 10.0 t ha(-1) y(-1) was observed for grassland converting to cropland (4.4%). An attempt has been made to identify the embedded driving forces of soil erosion in Rwanda. As a result, we found that mean soil loss for Rwanda's districts in 2015 was significantly correlated with poverty (r = 0.45, p = 0.013), increased use of chemical fertilizers (r = 0.77, p = 0.005), and especially was related to extreme poverty (r = 0.77, p = 0.000). The soil conservation scenario analysis for Rwanda's cropland in 2015 revealed that terracing could reduce the soil loss by 24.8% (from 14.6 t ha(-1) y(-1) to 11.7 t ha(-1) y(-1)). Most importantly, the study suggests that (1) terracing integrated with mulching and cover crops could effectively control water erosion while ameliorating soil quality and fertility, and (2) reforestation schemes targeting the rapid-growing tree species are therefore recommended as an important feature for erosion control in the study area.
电子版国际标准刊号	2071-1050
资助项目	National Natural Science Foundation of China[41771320] ; National Natural Science Foundation of China[41771321] ; National Natural Science Foundation of China[41977075]
WOS关键词	SOIL-EROSION ; COVER CHANGE ; RUSLE ; CONSERVATION ; RAINFALL ; EASTERN ; RUNOFF ; DEGRADATION ; CATCHMENT ; LANDSCAPE
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
语种	英语
出版者	MDPI
WOS记录号	WOS:000521955600050
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/34141]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	He Xiubin
作者单位	1.State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China 2.Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China; 4.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
推荐引用方式 GB/T 7714	Nambajimana Jean de Dieu,He Xiubin,Zhou Ji,et al. Land Use Change Impacts on Water Erosion in Rwanda[J]. SUSTAINABILITY,2020,12(1):50.
APA	Nambajimana Jean de Dieu.,He Xiubin.,Zhou Ji.,Justine Meta Francis.,Li Jinlin.,...&Nsabimana Gratien.(2020).Land Use Change Impacts on Water Erosion in Rwanda.SUSTAINABILITY,12(1),50.
MLA	Nambajimana Jean de Dieu,et al."Land Use Change Impacts on Water Erosion in Rwanda".SUSTAINABILITY 12.1(2020):50.