Hawaii water resource region

The Hawaii water resource region is one of 21 major geographic areas, or regions, in the first level of classification used by the United States Geological Survey to divide and sub-divide the United States into successively smaller hydrologic units. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a series of rivers.[1][2]

The Hawaii region, which is listed with a 2-digit hydrologic unit code (HUC) of 20, has an approximate size of 6,428 square miles (16,650 square kilometers), and consists of 9 subregions, which are listed with the 4-digit HUCs 2001 through 2009.[3]

This region includes the drainage within the state of Hawaii. Includes all of Hawaii.[3]

The Hawaii region, with its nine 4-digit subregion hydrologic unit boundaries.

List of water resource subregions

Subregion HUC[4]Subregion Name[4]Subregion Description[3]Subregion Location[4]Subregion Size[4]Subregion Map
2001Hawaii subregionThe drainage on the island of Hawaii; and associated waters.Hawaii4,030 sq mi (10,400 km2)
HUC2001
2002Maui subregionThe drainage on the island of Maui; and associated waters.Hawaii730 sq mi (1,900 km2)
HUC2002
2003Kahoolawe subregionThe drainage on the island of Kahoolawe; and associated waters.Hawaii45 sq mi (120 km2)
HUC2003
2004Lanai subregionThe drainage on the island of Lanai; and associated waters.Hawaii140 sq mi (360 km2)
HUC2004
2005Molokai subregionThe drainage on the island of Molokai; and associated waters.Hawaii260 sq mi (670 km2)
HUC2005
2006Oahu subregionThe drainage on the island of Oahu; and associated waters.Hawaii630 sq mi (1,600 km2)
HUC2006
2007Kauai subregionThe drainage on the island of Kauai; and associated waters.Hawaii560 sq mi (1,500 km2)
HUC2007
2008Niihau subregionThe drainage on the islands of Niihau and Kaula; and associated waters.Hawaii72 sq mi (190 km2)
HUC2008
2009Northwestern Hawaiian Islands subregionThe drainage on Kure, Laysan, Lisianski, Necker, and Nihoa Islands; Gardner Pinnacles; Maro, and Pearl and Hermes Reefs; French Frigate Shoals; and other islets, reefs, and associated waters northwest of Niipau Island.HawaiiLess than 10 sq mi (26 km2)
HUC2009

See also

References