Identifying ENSO events and their nexus with precipitation and flood dynamics in the Karnali River Basin, Nepal
文献类型：期刊论文
| 作者 | Adhikari, Tirtha Raj6,7,8; Baniya, Binod5,8; Tang, Qiuhong4,8; Li, He4,8; Shrestha, Suraj3; Awasthi, Ram Prasad2; Gaffney, Paul P. J.8; Dhital, Yam Prasad1 |
| 刊名 | NATURAL HAZARDS
 |
| 出版日期 | 2026-03-26 |
| 卷号 | 122期号:8页码:330 |
| 关键词 | ENSO Precipitation Extreme floods River channel shifts Transboundary Karnali River Basin Nepal |
| ISSN号 | 0921-030X |
| DOI | 10.1007/s11069-026-08076-y |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | El Ni & ntilde;o Southern Oscillation (ENSO), encompassing El Ni & ntilde;o and La Ni & ntilde;a, significantly influences river flooding patterns, which is prompting to investigate its relationship with floods in Nepal's transboundary Karnali River Basin (KRB). Focusing on extreme flood events during El Ni & ntilde;o and La Ni & ntilde;a years, this research aims to enhance the understanding of ENSO's impact on hydrological and hydrodynamic processes. Precipitation and discharge data spanning from 1964 to 2020 sourced from the Department of Hydrology and Meteorology (DHM), Government of Nepal, were analyzed. Hydrodynamic modeling, employing HEC-HMS and HEC-RAS, identified four significant El Ni & ntilde;o events in 1983, 2000, 2014 (La Ni & ntilde;a years), and 2015 (a strong El Ni & ntilde;o year) at the basin. The study identified ENSO events and examined basin characteristics, precipitation depth, river discharge, and gauge height, utilizing daily data for model estimation of flood discharge and depth. Analysis of ENSO-related variability, including Sea Surface Temperature (SST), Southern Oscillation Index (SOI), and Multivariate ENSO Index (MEI), alongside pressure, temperature, and discharge data across the KRB, was conducted using a three-year running mean. The Soil Conservation Service (SCS) method was integrated within the HEC-HMS and HEC-RAS models to evaluate rainfall duration and flood response considering terrain, soil, and land use. Model simulations revealed river channel shifts, particularly along the right bank, during the 2015 ENSO event. Intensity-duration-frequency (IDF) and correlation/regression analyses further elucidated the impact of ENSO, with the lowest recorded precipitation and discharge observed during the 2015 El Ni & ntilde;o event despite localized heavy rainfall. Comparative analysis of flood discharge, gauge height, inundation extents, depths, and velocities across ENSO years highlighted a significant relationship between observed and modeled discharge during the monsoon season. The positive correlation between basin mean precipitation and discharge during ENSO event indicating precipitation as a key driver of the basin's hydrology. These findings offer valuable insights for water resource management and development, aiding in the anticipation of future strong ENSO and El Ni & ntilde;o events in the region. |
| URL标识 | 查看原文 |
| WOS关键词 | NINO-SOUTHERN-OSCILLATION ; EL-NINO ; SUMMER RAINFALL ; HIMALAYA ; PACIFIC ; CLIMATE ; IMPACT ; CHINA |
| WOS研究方向 | Geology ; Meteorology & Atmospheric Sciences ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001724045600002 |
| 出版者 | SPRINGER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/221573]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 通讯作者 | Baniya, Binod |
| 作者单位 | 1.Guizhou Normal Univ, Sch Geog & Environm Sci, Guiyang, Peoples R China 2.Govt Nepal, Dept Hydrol & Meteorol, Kathmandu, Nepal; 3.Inst Fundamental Res & Studies InFeRS, Kathmandu, Nepal; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 5.Tribhuvan Univ, Dept Environm Sci, Patan Multiple Campus, Patandhoka, Nepal; 6.Tribhuvan Univ, Cent Dept Hydrol & Meteorol, Kathmandu, Nepal; 7.Tribhuvan Univ, Coll Appl Sci Nepal, Environm Sci, Kathmandu, Nepal; 8.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Adhikari, Tirtha Raj,Baniya, Binod,Tang, Qiuhong,et al. Identifying ENSO events and their nexus with precipitation and flood dynamics in the Karnali River Basin, Nepal[J]. NATURAL HAZARDS,2026,122(8):330. |
| APA | Adhikari, Tirtha Raj.,Baniya, Binod.,Tang, Qiuhong.,Li, He.,Shrestha, Suraj.,...&Dhital, Yam Prasad.(2026).Identifying ENSO events and their nexus with precipitation and flood dynamics in the Karnali River Basin, Nepal.NATURAL HAZARDS,122(8),330. |
| MLA | Adhikari, Tirtha Raj,et al."Identifying ENSO events and their nexus with precipitation and flood dynamics in the Karnali River Basin, Nepal".NATURAL HAZARDS 122.8(2026):330. |
入库方式： OAI收割
来源：地理科学与资源研究所
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