Sea-Level Rise Induced Multi-Mechanism Flooding And Contribution To Urban Infrastructure Failure

Habel, Shellie; Fletcher, Charles H.; Anderson, Tiffany R.; Thompson, Philip R.

doi:10.1038/s41598-020-60762-4

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i

Sea-Level Rise Induced Multi-Mechanism Flooding And Contribution To Urban Infrastructure Failure

2020
By Habel, Shellie ; Fletcher, Charles H. ; Anderson, Tiffany R. ; ...
Source: Scientific Reports, 10, 3796, 2020

[PDF-2.26 MB]

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Journal Title:

Scientific Reports
Personal Author:

Habel, Shellie ; Fletcher, Charles H. ; Anderson, Tiffany R. ; Thompson, Philip R.

Habel, Shellie ; Fletcher, Charles H. ; Anderson, Tiffany R. ; Thompson, Philip R. Less -
NOAA Program & Office:

Sea Grant ; OAR (Oceanic and Atmospheric Research) ; JIMAR (Joint Institute for Marine and Atmospheric Research) ; NMFS (National Marine Fisheries Service)

Sea Grant ; OAR (Oceanic and Atmospheric Research) ; JIMAR (Joint Institute for Marine and Atmospheric Research) ; NMFS (National Marine Fisheries Service) Less -
Sea Grant Program:

HAWAU (Hawaii Sea Grant)
Description:

Sea-level rise (SLR) induced flooding is often envisioned as solely originating from a direct marine source. This results in alternate sources such as groundwater inundation and storm-drain backflow being overlooked in studies that inform planning. Here a method is developed that identifies flooding extents and infrastructure vulnerabilities that are likely to result from alternate flood sources over coming decades. The method includes simulation of flood scenarios consisting of high-resolution raster datasets featuring flood-water depth generated by three mechanisms: (1) direct marine flooding, (2) storm-drain backflow, and (3) groundwater inundation. We apply the method to Honolulu’s primary urban center based on its high density of vulnerable assets and present-day tidal flooding issues. Annual exceedance frequencies of simulated flood thresholds are established using a statistical model that considers predicted tide and projections of SLR. Through assessment of multi-mechanism flooding, we find that approaching decades will likely feature large and increasing percentages of flooded area impacted simultaneously by the three flood mechanisms, in which groundwater inundation and direct marine flooding represent the most and least substantial single-mechanism flood source, respectively. These results illustrate the need to reevaluate main sources of SLR induced flooding to promote the development of effective flood management strategies.
Keywords:

[+]

Flooding Sea Level Rise
Source:

Scientific Reports, 10, 3796, 2020
DOI:

https://doi.org/10.1038/s41598-020-60762-4
Document Type:

Journal Article
Funding:

Grant no. NA11NMF4320128 ; Grant no. NA18OAR4170076

Grant no. NA11NMF4320128 ; Grant no. NA18OAR4170076 Less -
Rights Information:

CC BY
Compliance:

Submitted
Main Document Checksum:

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urn:sha256:1431f19c3e46d07e86ec09104f730101b14d383cabafc2d1b8a393012cd7377a
Download URL:

https://repository.library.noaa.gov/view/noaa/25865/noaa_25865_DS1.pdf
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Sea-Level Rise Induced Multi-Mechanism Flooding And Contribution To Urban Infrastructure Failure

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