Pacific Northwest water resource region

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The Pacific Northwest 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]

Contents

The Pacific Northwest region, which is listed with a 2-digit hydrologic unit code (HUC) of 17, has an approximate size of 302,334 square mile s (783,040 square kilometers ), and consists of 12 subregions, which are listed with the 4-digit HUCs 1701 through 1706. [3]

This region includes the drainage within the United States that ultimately discharges into: (a) the Strait of Georgia and of Strait of Juan de Fuca, and (b) the Pacific Ocean within the states of Oregon and Washington; and that part of the Great Basin whose discharge is into the state of Oregon. Includes all of Washington and parts of California, Idaho, Montana, Nevada, Oregon, Utah, and Wyoming. [3]

The Pacific Northwest region, with its 12 4-digit subregion hydrologic unit boundaries. HUC17.jpg
The Pacific Northwest region, with its 12 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
1701 Kootenai–Pend Oreille–Spokane subregion The Kootenai, Pend Oreille, and Spokane River Basins within the United States.Idaho, Montana, and Washington.36,600 sq mi (95,000 km2)
HUC1701 HUC1701.jpg
HUC1701
1702 Upper Columbia subregion The Columbia River Basin within the United States above the confluence with the Snake River Basin, excluding the Yakima River Basin.Washington22,600 sq mi (59,000 km2)
HUC1702 HUC1702.jpg
HUC1702
1703 Yakima subregion The Yakima River Basin.Washington6,210 sq mi (16,100 km2)
HUC1703 HUC1703.jpg
HUC1703
1704 Upper Snake subregion The Snake River Basin to and including the Clover Creek Basin.Idaho, Nevada, Utah, and Wyoming.35,600 sq mi (92,000 km2)
HUC1704 HUC1704.jpg
HUC1704
1705 Middle Snake subregion The Snake River Basin below the Clover Creek Basin to Hells Canyon Dam.Idaho, Nevada, and Oregon.36,700 sq mi (95,000 km2)
HUC1705 HUC1705.jpg
HUC1705
1706 Lower Snake subregion The Snake River Basin below Hells Canyon Dam to its confluence with the Columbia River.Idaho, Oregon, and Washington.35,200 sq mi (91,000 km2)
HUC1706 HUC1706.jpg
HUC1706
1707 Middle Columbia subregion The Columbia River Basin below the confluence with the Snake River Basin to Bonneville Dam.Oregon and Washington.29,800 sq mi (77,000 km2)
HUC1707 HUC1707.jpg
HUC1707
1708 Lower Columbia subregion The Columbia River Basin below Bonneville Dam, excluding the Willamette River Basin.Oregon and Washington.6,250 sq mi (16,200 km2)
HUC1708 HUC1708.jpg
HUC1708
1709 Willamette subregion The Willamette River Basin.Oregon11,400 sq mi (30,000 km2)
HUC1709 HUC1709.jpg
HUC1709
1710 Oregon–Washington Coastal subregion The drainage into the drainage boundary to the Smith River Basin boundary, excluding the Columbia River Basin.California, Oregon, and Washington.23,200 sq mi (60,000 km2)
HUC1710 HUC1710.jpg
HUC1710
1711 Puget Sound subregion The drainage within the United States that discharges into: (a) Puget Sound and the Straits of Georgia and of Juan De Fuca; and (b) the Fraser River Basin.Washington16,800 sq mi (44,000 km2)
HUC1711 HUC1711.jpg
HUC1711
1712 Oregon closed basins subregion The drainage of the Great Basin that discharges into the state of Oregon.California, Nevada, and Oregon.17,300 sq mi (45,000 km2)
HUC1712 HUC1712.jpg
HUC1712

See also

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References

  1. ↑ "Science in Your Watershed - Locate Your Watershed". USGS . Retrieved 2016-10-12.PD-icon.svgThis article incorporates text from this source, which is in the public domain.
  2. ↑ "Hydrologic Unit Maps". USGS . Retrieved 2016-10-12.PD-icon.svgThis article incorporates text from this source, which is in the public domain.
  3. 1 2 3 "Boundary Descriptions and Names of Regions, Subregions, Accounting Units and Cataloging Units". water.usgs.gov. USGS . Retrieved 2016-10-12.PD-icon.svgThis article incorporates text from this source, which is in the public domain.
  4. 1 2 3 4 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.PD-icon.svgThis article incorporates text from this source, which is in the public domain.
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