Extent of cropland and related soil erosion risk in rwanda
文献类型：期刊论文
| 作者 | Karamage, Fidele1,2,3; Zhang, Chi1,4; Ndayisaba, Felix1,2,3; Shao, Hua1,2; Kayiranga, Alphonse1,2,3; Fang, Xia1,2; Nahayo, Lamek1,2,3; Nyesheja, Enan Muhire1,2,3; Tian, Guangjin5 |
| 刊名 | Sustainability
 |
| 出版日期 | 2016-07-01 |
| 卷号 | 8期号:7页码:19 |
| 关键词 | Soil erosion Cropland Terracing Rusle Remote sensing Gis Land cover and land use Rwanda |
| ISSN号 | 2071-1050 |
| DOI | 10.3390/su8070609 |
| 通讯作者 | Zhang, chi(zc@ms.xjb.ac.cn) |
| 英文摘要 | Land conversion to cropland is one of the major causes of severe soil erosion in africa. this study assesses the current cropland extent and the related soil erosion risk in rwanda, a country that experienced the most rapid population growth and cropland expansion in africa over the last decade. the land cover land use (lclu) map of rwanda in 2015 was developed using landsat-8 imagery. based on the obtained lclu map and the spatial datasets of precipitation, soil properties and elevation, the soil erosion rate of rwanda was assessed at 30-m spatial resolution, using the revised universal soil loss equation (rusle) model. according to the results, the mean soil erosion rate was 250 t.ha(-1).a(-1) over the entire country, with a total soil loss rate of approximately 595 million tons per year. the mean soil erosion rate over cropland, which occupied 56% of the national land area, was estimated at 421 t.ha(-1).a(-1) and was responsible for about 95% of the national soil loss. about 24% of the croplands in rwanda had a soil erosion rate larger than 300 t.ha(-1).a(-1), indicating their unsuitability for cultivation. with a mean soil erosion rate of 1642 t.ha(-1).a(-1), these unsuitable croplands were responsible for 90% of the national soil loss. most of the unsuitable croplands are distributed in the congo nile ridge, volcanic range mountain areas in the west and the buberuka highlands in the north, regions characterized by steep slopes (>30%) and strong rainfall. soil conservation practices, such as the terracing cultivation method, are paramount to preserve the soil. according to our assessment, terracing alone could reduce the mean cropland soil erosion rate and the national soil loss by 79% and 75%, respectively. after terracing, only a small proportion of 7.6% of the current croplands would still be exposed to extreme soil erosion with a rate >300 t.ha(-1).a(-1). these irremediable cropland areas should be returned to mountain forest to foster environmental sustainability or further sustainable alternative erosion control techniques may be applied, such as applying vetiver eco-engineering technology due to its economical soil erosion control and stabilization of steep slopes and the construction of erosion control dams to absorb and break down excess runoff from unusually intense storms in various parts of the watersheds. |
| WOS关键词 | LAND-COVER CHANGE ; LOSS EQUATION ; R-FACTOR ; CONSERVATION ; GIS ; CLASSIFICATIONS ; ACCURACY ; TERRACES ; IMPACTS ; FORESTS |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences ; Environmental Studies |
| 语种 | 英语 |
| WOS记录号 | WOS:000380760400020 |
| 出版者 | MDPI AG |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2376273 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zhang, Chi |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Lay Adventists Kigali UNILAK, Fac Environm Sci, PO 6392, Kigali, Rwanda 4.Hubei Univ Sci & Technol, Sch Resources Environm Sci & Engn, Xianning 430000, Peoples R China 5.Beijing Normal Univ, Sch Environm, State Key Lab Water Environm Simulat, Beijing 100875, Peoples R China |
| 推荐引用方式 GB/T 7714 | Karamage, Fidele,Zhang, Chi,Ndayisaba, Felix,et al. Extent of cropland and related soil erosion risk in rwanda[J]. Sustainability,2016,8(7):19. |
| APA | Karamage, Fidele.,Zhang, Chi.,Ndayisaba, Felix.,Shao, Hua.,Kayiranga, Alphonse.,...&Tian, Guangjin.(2016).Extent of cropland and related soil erosion risk in rwanda.Sustainability,8(7),19. |
| MLA | Karamage, Fidele,et al."Extent of cropland and related soil erosion risk in rwanda".Sustainability 8.7(2016):19. |
入库方式： iSwitch采集
来源：中国科学院大学
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。