中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 成都山地灾害与环境研究所
  3. 中国科学院水利部成都山地灾害与环境研究所
  4. 山地灾害与地表过程重点实验室
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 Ahmed3,5; Cui, Peng3,5; Hussain, Tahir2,5; Zhang, Guo-Tao4; Wang, Yan4; Akhter, Muhammad Gulraiz2; Wang, Hao5; Alam, Mehtab1
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
DOI10.1016/j.accre.2025.02.003
通讯作者Cui, Peng(pengcui@imde.ac.cn) ; Zhang, Guo-Tao(zhangguotao@igsnrr.ac.cn)
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.
资助项目National Natural Science Foundation of China[42350410445] ; National Natural Science Foundation of China[4231101214] ; National Natural Science Foundation of China[42201086] ; International Partnership Program of Chinese Academy of Sciences[046GJHZ2023071MI]
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
资助机构National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences
源URL[http://ir.imde.ac.cn/handle/131551/58993]  
专题成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者Cui, Peng; Zhang, Guo-Tao
作者单位1.Ghulam Ishaq Khan Inst Engn Sci & Technol, Dept Civil Engn, Topi 23640, Swabi, Pakistan
2.Quaid I Azam Univ, Dept Earth Sci, Islamabad 45320, Pakistan
3.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Islamabad 45320, Pakistan
4.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
5.Chinese Acad Sci, Key Lab Mt Surface Proc & Hazards, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
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：成都山地灾害与环境研究所

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。