Coastal flooding in Asian megadeltas: Recent advances, persistent challenges, and call for actions amidst local and global changes

Becker, M., Seeger, K., Paszkowski, A., Marcos, M., Papa, F., Almar, R., Bates, P., France-Lanord, C., Hossain, Md S., Khan, Md J. U., Karegar, M. A., Karpytchev, M., Long, N., Minderhoud, P. S. J., Neal, J., Nicholls, R. J. ORCID: https://orcid.org/0000-0002-9715-1109 and Syvitski, J. (2024) Coastal flooding in Asian megadeltas: Recent advances, persistent challenges, and call for actions amidst local and global changes. Reviews of Geophysics, 62 (4). ISSN 8755-1209

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Abstract

Asian megadeltas, specifically the Ganges-Brahmaputra-Meghna, Irrawaddy, Chao Phraya, Mekong, and Red River deltas host half of the world's deltaic population and are vital for Asian countries' ecosystems and food production. These deltas are extremely vulnerable to global change. Accelerating relative sea-level rise, combined with rapid socio-economic development intensifies these vulnerabilities and calls for a comprehensive understanding of current and future coastal flood dynamics. Here we provide a state-of-the-art on the current knowledge and recent advances in quantifying and understanding the drivers of coastal flood-related hazards in these deltas. We discuss the environmental and physical drivers, including climate influence, hydrology, oceanography, geomorphology, and geophysical processes and how they interact from short to long-term changes, including during extreme events. We also jointly examine how human disturbances, with catchment interventions, land use changes and resource exploitations, contribute to coastal flooding in the deltas. Through a systems perspective, we characterize the current state of the deltaic systems and provide essential insights for shaping their sustainable future trajectories regarding the multifaceted challenges of coastal flooding.

Item Type:	Article
Additional Information:	Data Availability Statement: No new data was created or used for this research. Funding information: This research was supported by the International Space Science Institute (ISSI) in Bern, through ISSI International Team project #548: “Past, Present and Future of the Asian Mega-Deltas: The Role of Space Observations.” This work also benefits from the support of the French CNES TOSCA program through the DeltAsia project. M.B., N.L., J.K., M.K., and F.P. were supported by the French Research Agency (ANR) under the DELTA project (ANR-17-CE03-0001). P.S.J.M. is supported by the Dutch Science Foundation (NWO) under the Drowning Deltas project (Veni-TTW-20231). K.S. is supported by the German Research Foundation (DFG) under the Rising Sea And Sinking Land project (project number 411257639). M.A.K was supported by DFG under SFB 1502/1-2022 (project number 450058266).
UEA Research Groups:	University of East Anglia Schools > Faculty of Science > Tyndall Centre for Climate Change Research Faculty of Science > Research Centres > Tyndall Centre for Climate Change Research
Depositing User:	LivePure Connector
Date Deposited:	18 Jan 2025 01:09
Last Modified:	18 Jan 2025 01:09
URI:	https://ueaeprints.uea.ac.uk/id/eprint/98265
DOI:	10.1029/2024RG000846

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