The Great Basin 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 Great Basin region, which is listed with a 2-digit HUC code of 16, has an approximate size of 141717sqmi, and consists of 6 subregions, which are listed with the 4-digit HUC codes of 1601 through 1606.[3]
This region includes the drainage of the Great Basin that discharges into the states of Utah and Nevada. This includes parts of California, Idaho, Nevada, Oregon, Utah, and Wyoming.[4]
| Subregion HUC[5] | Subregion Name | Subregion Description | Subregion Location | Subregion Size | Subregion Map | |
|---|---|---|---|---|---|---|
| 1601 | The Bear River Basin. | Idaho, Utah, and Wyoming. | 7310sqmi | |||
| 1602 | The Great Salt Lake Basin excluding the Bear River Basin. | Idaho, Nevada, Utah, and Wyoming. | 28700sqmi | |||
| 1603 | The Escalante Desert and the Sevier Lake closed basins. | Nevada and Utah. | 16200sqmi | |||
| 1604 | The Humboldt River Basin, the Black Rock Desert, and other closed basins that discharge into Northwestern Nevada. | California, Nevada, and Oregon. | 28300sqmi | |||
| 1605 | The Central Lahontan Basin Consisting of the Carson, Truckee, and Walker River Basins. | California and Nevada. | 12500sqmi | |||
| 1606 | The Closed Desert Basins that discharge into South Central Nevada. | California and Nevada. | 47100sqmi |