Northern Mojave–Mono Lake water resource subregion explained

Northern Mojave–Mono Lake water resource subregion (HUC 1809) is one of 10 water resource subregions within the California water resource region and is one of 222 water resource subregions in the federally organized United States hydrologic unit system.

The tiers of the classification system, in order from largest to smallest, are regions, subregions, basins (formerly accounting units), subbasins (formerly cataloging units), watersheds, and subwatersheds. These geographic areas contain either the drainage area of a major river, or the combined drainage areas of a group of rivers.^{[1] [2]}

The Northern Mojave–Mono Lake subregion is approximately and includes closed desert basins that discharge into south-central California, including Mono Lake, Owens Lake, Death Valley, and the Upper Mojave Desert. ^[3] The Northern Mojave–Mono Lake subregion is composed of two third-level hydrological units called water resource basins (formerly accounting units), each with its own 6-digit hydrologic unit code. These two basins are further subdivided into a total of 11 water resource subbasins, each with its own 8-unit hydrologic code.

List of Northern Mojave–Mono Lake subregion basins

Basin HUC^[4]	Basin name	Basin description	Basin location	Basin size	Basin map
180901	Mono–Owens Lakes basin	Mono Lake and Owens Lake closed basins^[5]		4310mi2
180902	Northern Mojave basin	Closed desert basins that discharge into south-central California, including Death Valley and the Upper Mojave Desert, excluding Mono Lake and Owens Lake^[6]		23600mi2

See also

• South Lahontan hydrologic region

Notes and References

1. Web site: Science in Your Watershed - Locate Your Watershed . 2016-10-12 . USGS.
2. Web site: Hydrologic Unit Maps . 2016-10-12 . USGS.
3. Web site: USGS Water Resources: About USGS Water Resources . 2023-03-18 . water.usgs.gov.
4. Web site: National Hydropower Asset Assessment Environmental Attribution . 2016-10-12 . . 2013 . McManamay RA, Bevelhimer MS, Kao SC, Yaxing W, Martinez-Gonzalez M, Samu N.
5. Book: Codes for the identification of hydrologic units in the United States . National Institute of Standards . A109–A110 . en.
6. Book: Codes for the identification of hydrologic units in the United States . National Institute of Standards . A109–A110 . en.