Selected appendices from flood-frequency report—Magnitude and Frequency of Floods on Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi, 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-,...美国地质调查局（U.S. Geological Survey, USGS）与夏威夷州交通部（State of Hawaiʻi Department of Transportation）合作，估算了50年一遇、20年一遇、10年一遇、4年一遇、2年一遇……的洪水量级。