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Projected coastal flooding depths for 1-, 20-, and 100-year return interval storms and 0.00, +0.25, +0.50, +1.00, +1.50, +2.00, and +3.00 meter sea-level rise scenarios in the Hawaiian Islands

Dates

Publication Date
Start Date
2021-04-01
End Date
2022-08-01

Citation

Alkins, K.C., Lasserre, G., Reguero, B.G, and Storlazzi, C.D., 2024, Projected coastal flooding extents and depths for 1-, 20-, and 100-year return interval storms and 0.00, +0.25, +0.50, +1.00, +1.50, +2.00, and +3.00 meter sea-level rise scenarios in the Hawaiian, Mariana, and American Samoan Islands: U.S. Geological Survey data release, https://doi.org/ 10.5066/ P9RIQ7S7.

Summary

This data release provides flood depth GeoTIFFs based on sea-level rise and wave-driven total water levels for the coast of the most populated Hawaiian Islands of Oahu, Molokai, Kauai, Maui, and Big Island. Oceanographic, coastal engineering, ecologic, and geospatial data and tools were combined to evaluate the increased risks of storm-induced coastal flooding in the populated Hawaiian Islands due to climate change and sea-level rise. We followed risk-based valuation approaches to map flooding due to waves and storm surge at 10-m2 resolution along the coastlines for annual (1-year), 20-year, and 100-year return-interval storm events and +0.25 m, +0.50 m, +1.00 m, +1.50 m, +2.00 m, and +3.00 m sea-level rise scenarios.

Contacts

Attached Files

Click on title to download individual files attached to this item.

Projections_FloodDepths_BigIsland.zip 39.91 MB application/zip
Projections_FloodDepths_Kauai.zip 29.11 MB application/zip
Projections_FloodDepths_Maui.zip 17.98 MB application/zip
Projections_FloodDepths_Molokai.zip 4.85 MB application/zip
Projections_FloodDepths_Oahu.zip 66.48 MB application/zip

Purpose

These flood extent files were created to evaluate the increased risks of storm-induced coastal flooding in the most populated Hawaiian Islands Oahu, Molokai, Kauai, Maui, and Big Island due to climate change and sea-level rise. The data are intended to provide a spatially explicit, rigorous valuation of how, where, and when climate change and sea-level rise increase coastal storm-induced flooding to help identify areas where management and/or restoration could potentially help reduce the risk to, and increase the resiliency of, the coastal communities in Hawaii. The data can be used with geographic information systems (GIS) software for research purposes. The methods follow a sequence of steps derived from Storlazzi and others (2019, 2021) and Reguero and others (2021) that integrate physics-based oceanographic and coastal engineering modeling, along with ecologic and geospatial data and tools, to quantify the role of climate change and sea-level rise in increasing coastal flooding hazards.

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