Rainfall erosivity and sediment dynamics in the Himalaya catchment during the Melamchi flood in Nepal
文献类型：期刊论文
| 作者 | Baniya, Binod6,7; Tang, Qiu-hong7; Neupane, Bhupati5,6; Xu, Xi-meng7; He, Li7; Adhikari, Tirtha Raj1,4,7; Shamsi, Seyed Rashid Fallah3,7; Dhital, Yam Prasad2 |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 20期号:10页码:2993-3009 |
| ISSN号 | 1672-6316 |
| 关键词 | Rainfall erosivity Sediment Extreme flood Melamchi Nepal |
| DOI | 10.1007/s11629-023-8231-2 |
| 通讯作者 | Baniya, Binod(binod.baniya@pmc.tu.edu.np) |
| 英文摘要 | Rainfall erosivity is an indicator of rainfall potential to cause soil erosion. The Melamchi extreme flood occurred on June-15 and recurred on July-31, 2021 in Nepal. During these flooding events, a large volume of sediments were eroded, transported and deposited due to the high rainfall erosivity of the basin. In this study, the temporal and the spatial distribution of rainfall erosivity within the Melamchi River Basin was estimated and further linked to sediment discharge and concentration at various sites along the river segments. The daily rainfall data for the event year 2021 of the entire basin were used. Validation was performed by post-flooding grain size sampling. The result showed that rainfall and rainfall erosivity exhibit pronounced intensity within the Melamchi River basin, particularly at Sermathang and Tarkeghang, both located in the middle section of the basin. The average annual rainfall in the Melamchi region was 3140.39 mm with an average annual erosivity of 18302.06 (MJ mm)/(ha h yr). The average daily erosivity of the basin was 358.67 (MJ mm)/(ha h) during the first event and 1241 (MJ mm)/(ha h) for the second event. In the upper section of sampling, the sediment size ranged from 0.1 mm to >8 mm and was poorly graded. However, the lower region had smaller sediment ranging from 0.075 mm to >4.75 mm and also well graded. The smaller size (<1 mm) sediment passing was much higher in the Chanaute (78%) and Melamchi (66.5%) river segments but the larger size (>100 mm) sediments were passed relatively higher from the Kiwil (8.20%) and Ambathan (8.39%) river segments. During pre-monsoon and monsoon seasons, the highest sediment concentration was found to be 563.8 g/L and 344.3 g/L in Bhimtar and the lowest was 238.5 g/L and 132.1 g/L at the Ambathan, respectively. The sediment concentration during the pre-monsoon was found to be higher than the sediment concentration during the monsoon season in the Melamchi River. The more erosive regions in the basin were associated with the presence of highly fractured rock, weathered rocks and a thrust (weak) zone. The higher rainfall erosivity at upstream and the higher sediment concentration at downstream during flooding events have coincided well in the basin. Thus, the estimation of rainfall erosivity at the catchment scale and its influences on sediment concentration in the river are crucial for erosion control measures during flooding times in the Himalaya. |
| WOS关键词 | R-FACTOR ; HAZARD ; STREAM ; MISUSE ; RIVER |
| 资助项目 | This study and first author are supported by the Collaborative Research Program of the Alliance of International Science Organization (ANSO) (ANSO-CR-KP-2021-09), CAS Interdisciplinary Innovation Team (xbzg-zdsys-202104) and President's International Fello[ANSO-CR-KP-2021-09] ; Collaborative Research Program of the Alliance of International Science Organization (ANSO)[xbzg-zdsys-202104] ; CAS Interdisciplinary Innovation Team[2023VCC0001] ; CAS Interdisciplinary Innovation Team[2024VEA0001] ; Chinese Academy of Science (CAS) international talent ; National Disaster Risk Reduction and Management Authority (NDRRMA) Government of Nepal ; Institute of Science and Technology (IoST), Tribhuvan University |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:001101927300013 |
| 资助机构 | This study and first author are supported by the Collaborative Research Program of the Alliance of International Science Organization (ANSO) (ANSO-CR-KP-2021-09), CAS Interdisciplinary Innovation Team (xbzg-zdsys-202104) and President's International Fello ; Collaborative Research Program of the Alliance of International Science Organization (ANSO) ; CAS Interdisciplinary Innovation Team ; Chinese Academy of Science (CAS) international talent ; National Disaster Risk Reduction and Management Authority (NDRRMA) Government of Nepal ; Institute of Science and Technology (IoST), Tribhuvan University |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/201208]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Baniya, Binod |
| 作者单位 | 1.Tribhuvan Univ, Cent Dept Hydrol & Meteorol, Kathmandu 44613, Nepal 2.Shihezi Univ, Coll Water Resources & Architectural Engn, Shihezi 832000, Peoples R China 3.Shiraz Univ, Coll Agr, Dept Nat Resource & Environm, Shiraz 71345, Iran 4.Tribhuvan Univ, Coll Appl Sci, Kathmandu 44613, Nepal 5.Chinese Acad Sci, Inst Tibetan Plateau Res, State Key Lab Tibetan Plateau Earth Syst Environm, Beijing 100101, Peoples R China 6.Tribhuvan Univ, Inst Sci & Technol, Dept Environm Sci, Patan Multiple Campus, Kathmandu 44613, Nepal 7.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Baniya, Binod,Tang, Qiu-hong,Neupane, Bhupati,et al. Rainfall erosivity and sediment dynamics in the Himalaya catchment during the Melamchi flood in Nepal[J]. JOURNAL OF MOUNTAIN SCIENCE,2023,20(10):2993-3009. |
| APA | Baniya, Binod.,Tang, Qiu-hong.,Neupane, Bhupati.,Xu, Xi-meng.,He, Li.,...&Dhital, Yam Prasad.(2023).Rainfall erosivity and sediment dynamics in the Himalaya catchment during the Melamchi flood in Nepal.JOURNAL OF MOUNTAIN SCIENCE,20(10),2993-3009. |
| MLA | Baniya, Binod,et al."Rainfall erosivity and sediment dynamics in the Himalaya catchment during the Melamchi flood in Nepal".JOURNAL OF MOUNTAIN SCIENCE 20.10(2023):2993-3009. |
入库方式： OAI收割
来源：地理科学与资源研究所
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。