Spatial distribution of soil erosion and sediment yield in the Koshi River Basin, Nepal: a case study of Triyuga watershed
文献类型：期刊论文
| 作者 | Yigez, Belayneh; Xiong, Donghong; Zhang, Baojun; Yuan, Yong; Baig, Muhammad Aslam; Dahal, Nirmal Mani; Guadie, Awoke; Zhao, Wei; Wu, Yanhong |
| 刊名 | JOURNAL OF SOILS AND SEDIMENTS
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| 页码 | - |
| 关键词 | Soil loss Sedimentation Revised universal soil loss equation Sediment delivery ratio Riverbed aggradation |
| ISSN号 | 1439-0108 |
| 英文摘要 | Purpose Understanding the spatial dynamics of soil loss (SL) and sediment yield (SY) from ungauged watersheds would have a profound importance to devise informed land resource and flood management strategies. Such information particularly substantial for rivers like Koshi, that typically causing severe land degradation and frequent devastating flood risks to large number of inhabitants in the basin. This study aimed to estimate the spatial heterogeneity of mean annual SL and SY in Triyuga river watershed (TRW) and delivers into Sapta-Koshi. Materials and methods The Revised Universal Soil Loss Equation (RUSLE) and Slope-based Sediment Delivery Ratio (SDR) models along with Geographic Information System (GIS) and remote sensing techniques were applied. Results and discussion The mean SL and SY were found to be 31 and 3.04 t/ha/year, respectively. Accordingly, an estimated 2.2 x 10(5) tons of sediment was delivered into the Sapta-Koshi river annually. In this watershed, nearly 62% of the area is under the category of high to very severe soil loss rate (SLR), which together accounted for 96% of the total SL in the TRW. The critical SLR was mostly distributed along the northern escarpment of the study area. Most of the sloping areas in the northwestern and some patches of the northeastern tip regions that accompany with slope class > 26.8% are particularly vulnerable to severe SL and SY in the TRW. In this regard, the RUSLE LS factor has played the significant (r = 0.88, p < 0.001) impact over other RUSLE factors. Conclusion High elevation and steep slope class in the northwestern and northeastern parts of the watershed are the major SL and SY hotspot sites that require special attention and priority for conservation interventions in the TRW. |
| WOS研究方向 | Environmental Sciences ; Soil Science |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46154]  |
| 专题 | 生态环境研究中心_中国科学院环境生物技术重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Environm Biotechnol, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China 4.CAS TU, Branch Sustainable Mt Dev, Kathmandu Ctr Res & Educ, Kathmandu 44613, Nepal 5.Arba Minch Univ, Coll Nat Sci, Dept Biol, Arba Minch 21, Ethiopia |
| 推荐引用方式 GB/T 7714 | Yigez, Belayneh,Xiong, Donghong,Zhang, Baojun,et al. Spatial distribution of soil erosion and sediment yield in the Koshi River Basin, Nepal: a case study of Triyuga watershed[J]. JOURNAL OF SOILS AND SEDIMENTS:-. |
| APA | Yigez, Belayneh.,Xiong, Donghong.,Zhang, Baojun.,Yuan, Yong.,Baig, Muhammad Aslam.,...&Wu, Yanhong. |
| MLA | Yigez, Belayneh,et al."Spatial distribution of soil erosion and sediment yield in the Koshi River Basin, Nepal: a case study of Triyuga watershed".JOURNAL OF SOILS AND SEDIMENTS |
入库方式： OAI收割
来源：生态环境研究中心
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