Exploring the roles of recorded unprecedented rainfall-runoff characteristics and uplifted riverbeds in the catastrophic 2022 Pakistan megaflood
文献类型：期刊论文
| 作者 | Bazai, Nazir Ahmed1,3; Cui, Peng1,3; Hussain, Tahir1,4; Zhang, Guo-Tao2; Wang, Yan2; Akhter, Muhammad Gulraiz4; Wang, Hao1; Alam, Mehtab5 |
| 刊名 | ADVANCES IN CLIMATE CHANGE RESEARCH
 |
| 出版日期 | 2025-04-01 |
| 卷号 | 16期号:2页码:409-424 |
| 关键词 | Extreme monsoon circulation Pakistan megaflood Unprecedented high-magnitude streamflow Riverbed uplifting Future challenges |
| ISSN号 | 1674-9278 |
| DOI | 10.1016/j.accre.2025.02.003 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | Catastrophic floods triggered by extreme monsoonal rainfall have increasingly posed challenges in flood management, particularly in lowincome nations like Pakistan. The 2022 megaflood exposed substantial gaps in understanding the interplay between rainfall, sediment dynamics, and flood amplification processes. This study investigates the causes and impacts of the event, focusing on floodwater sources, geomorphological changes, and future risks and mitigation strategies. A multifaceted approach combined with remote sensing, field observations, hydrometeorological data, and climate models was employed. In July-August 2022, the lower Hindukush, Koh-e-Suleman, and Kirther ranges experienced rainfall of 200-300 mm, up to 726% above historical averages (1991-2021). This high-intensity rainfall triggered high-magnitude discharges from approximately 1250 streams, 58 % of which were primary contributors with discharge at 4000-5000 m3/s for nearly a month, causing 80%-85% of downstream damage and expanding the flooded area to 49,711 km2. Some streams recorded 5-6 m flood levels, resulting in sedimentation deposition of 0.8-1 m in residential areas and about 2 m in the streambeds. Deposition downstream and along the Indus River reached 1.5-2 m, intensifying flood risks by reducing channel capacity and increasing water levels during flood events. Streambed uplift and sediment deposition emerged as critical factors amplifying flood magnitude, severity, and inundation, with floodwater levels rising by up to 2.4-3 m in some areas, posing severe risks for future events. These findings highlight the need to revise traditional flood risk models, which often overlook sediment dynamics and underscore the future challenges posed by ongoing sediment deposition and climate change, which are expected to exacerbate flood risks in the coming decades. The study emphasizes the importance of sediment management, river erosion control, and post-event interventions. Prioritizing flood management, enhancing early warning systems, and investing in resilient infrastructure are essential strategies to protect communities and ensure long-term safety. |
| URL标识 | 查看原文 |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001515103800001 |
| 出版者 | KEAI PUBLISHING LTD |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/214655]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 通讯作者 | Cui, Peng; Zhang, Guo-Tao |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Mt Surface Proc & Hazards, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China; 2.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; 3.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Islamabad 45320, Pakistan; 4.Quaid I Azam Univ, Dept Earth Sci, Islamabad 45320, Pakistan; 5.Ghulam Ishaq Khan Inst Engn Sci & Technol, Dept Civil Engn, Topi 23640, Swabi, Pakistan |
| 推荐引用方式 GB/T 7714 | Bazai, Nazir Ahmed,Cui, Peng,Hussain, Tahir,et al. Exploring the roles of recorded unprecedented rainfall-runoff characteristics and uplifted riverbeds in the catastrophic 2022 Pakistan megaflood[J]. ADVANCES IN CLIMATE CHANGE RESEARCH,2025,16(2):409-424. |
| APA | Bazai, Nazir Ahmed.,Cui, Peng.,Hussain, Tahir.,Zhang, Guo-Tao.,Wang, Yan.,...&Alam, Mehtab.(2025).Exploring the roles of recorded unprecedented rainfall-runoff characteristics and uplifted riverbeds in the catastrophic 2022 Pakistan megaflood.ADVANCES IN CLIMATE CHANGE RESEARCH,16(2),409-424. |
| MLA | Bazai, Nazir Ahmed,et al."Exploring the roles of recorded unprecedented rainfall-runoff characteristics and uplifted riverbeds in the catastrophic 2022 Pakistan megaflood".ADVANCES IN CLIMATE CHANGE RESEARCH 16.2(2025):409-424. |
入库方式： OAI收割
来源：地理科学与资源研究所
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