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 |
|---|---|---|---|---|---|
| 2001 | Hawaii subregion | The drainage on the island of Hawaii; and associated waters. | Hawaii | 4,030 sq mi (10,400 km2) |  HUC2001 |
| 2002 | Maui subregion | The drainage on the island of Maui; and associated waters. | Hawaii | 730 sq mi (1,900 km2) |  HUC2002 |
| 2003 | Kahoolawe subregion | The drainage on the island of Kahoolawe; and associated waters. | Hawaii | 45 sq mi (120 km2) |  HUC2003 |
| 2004 | Lanai subregion | The drainage on the island of Lanai; and associated waters. | Hawaii | 140 sq mi (360 km2) |  HUC2004 |
| 2005 | Molokai subregion | The drainage on the island of Molokai; and associated waters. | Hawaii | 260 sq mi (670 km2) |  HUC2005 |
| 2006 | Oahu subregion | The drainage on the island of Oahu; and associated waters. | Hawaii | 630 sq mi (1,600 km2) |  HUC2006 |
| 2007 | Kauai subregion | The drainage on the island of Kauai; and associated waters. | Hawaii | 560 sq mi (1,500 km2) |  HUC2007 |
| 2008 | Niihau subregion | The drainage on the islands of Niihau and Kaula; and associated waters. | Hawaii | 72 sq mi (190 km2) |  HUC2008 |
| 2009 | Northwestern Hawaiian Islands subregion | The 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. | Hawaii | Less than 10 sq mi (26 km2) |  HUC2009 |
References
- "Science in Your Watershed - Locate Your Watershed". USGS. Retrieved 2016-10-12.
- "Hydrologic Unit Maps". USGS. Retrieved 2016-10-12.
- "Boundary Descriptions and Names of Regions, Subregions, Accounting Units and Cataloging Units". water.usgs.gov. USGS. Retrieved 2016-10-12.
- McManamay RA, Bevelhimer MS, Kao SC, Yaxing W, Martinez-Gonzalez M, Samu N (2013). "National Hydropower Asset Assessment Environmental Attribution". USGS-Oak Ridge National Laboratory. Retrieved 2016-10-12.
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