Data in support of flood-frequency report--Magnitude and Frequency of Floods on Kaua'i, Oʻahu, Moloka'i, Maui, and Hawai'i, State of Hawai'i, Based on Data through Water Year 2020

The U.S. Geological Survey (USGS), in cooperation with the State of Hawaiʻi Department of Transportation, estimated flood magnitudes for the 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEP) for unregulated streamgages in Kaua'i, Oʻahu, Moloka'i, Maui, and Hawaiʻi, State of Hawaiʻi, using data through water year 2020. Regression equations which can be used to estimate flood magnitude and associated frequency at ungaged streams were developed. The methods and results of the study are published in a separate report (https://doi.org/10.3133/sir20235014). This data release contains data supporting the larger work: (1) PeakFQ inputs and selected outputs for 238 selected streamgages in Hawaiʻi; (2) inputs and outputs for the USGS weighted-multiple-linear regression (WREG) program used to develop the regional regression equations; (3) geospatial data supporting the report, including basin delineations, basin characteristics, and regional regression boundaries; and (4) selected appendices from the larger work. These data can be used to reproduce the results in the larger work: Magnitude and Frequency of Floods on Kauaʻi, O'ahu, Moloka'i, Maui, and Hawai'i, State of Hawai'i, Based on Data through Water Year 2020.