Ocean Hazard Database for Hawaiian Coastal Highways

Harrison Togia, University of Hawaii at Manoa, Honolulu, HI, United States, Linqiang Yang, University of Houston, Houston, TX, United States and Oceana Puananilei Francis, University of Hawaii, Honolulu, United States
The Ocean Hazards Database (OHD) contains all relevant geographic information system (GIS) data, maps, measures, interpretations, and rankings from the assessment of ocean hazards at 302 mileposts and points of interest across coastal state routes in Hawaii as a part of the State of Hawaii Department of Transportation Statewide Highway Shoreline Program Report (2019). OHD measures include historical rates of sea-level rise (in/yr), projected rates of sea-level rise by 2050 and 2100 (in/yr), mean tidal ranges (ft), maximum annually recurring peak wave periods (sec) and significant wave heights (ft), mean projected shoreline change rates (ft/yr) and coastal armoring, historical and hypothetical tsunami flow depths (ft), hypothetical category 1-4 storm surge inundation heights (ft), and benthic habitats. Ranking criteria and data methods are described in chapter 3 of the State of Hawaii Statewide Coastal Highway Program Report (2019). OHD materials are organized into coastal highway digital elevation models, ocean hazard map packages, ocean hazard map images, and ocean hazard tables. Digital elevation models contain GIS layers and metadata for nearshore topographic and bathymetric elevations on the islands of Hawaii, Maui, Molokai, Oahu, and Kauai. Map packages contain GIS layers and mapping layouts for the assessment and projection of sea-level rise inundation, maximum annually recurring wave characteristics, projected shoreline change, storm surge inundation, as well as both nearshore and offshore elevations. Map images include nearshore and offshore transects, sea-level rise inundation extents, maximum annually recurring wave characteristics, projected shoreline changes, and storm surge inundation extents. Supplementary tables contain measures and rankings for the 302 mileposts and points of interest. Representative dataset references are included in table footnotes.