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・ Williamson Mausoleum at Orphans Cemetery
・ Williamson Mound Archeological District
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Williamson River (Oregon)
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・ Williamson Voices
・ Williamson's Arkansas Infantry Battalion


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Williamson River (Oregon) : ウィキペディア英語版
Williamson River (Oregon)


| mouth_name = Upper Klamath Lake
| mouth_location = near Modoc Point
| mouth_district =
| mouth_region =
| mouth_state =
| mouth_country =
| mouth_note =
| mouth_lat_d = 42
| mouth_lat_m = 27
| mouth_lat_s = 53
| mouth_lat_NS = N
| mouth_long_d = 121
| mouth_long_m = 57
| mouth_long_s = 25
| mouth_long_EW = W
| mouth_coordinates_note = 〔
| mouth_elevation_imperial = 4147
| mouth_elevation_note = 〔

| length_imperial = 100
| length_round = 0
| length_note = 〔
| watershed_imperial = 3000
| watershed_round = 0
| watershed_note =
| discharge_location = near Chiloquin, from the mouth
| discharge_round = 0
| discharge_imperial = 1032
| discharge_note =
| discharge_min_imperial = 285
| discharge_max_imperial = 17100
| discharge1_location =
| discharge1_imperial =
| discharge1_note =

| map = Williamson River and Sprague River Oregon map.jpg
| map_size = 300
| map_caption = The Williamson, Sprague, and Klamath rivers
| map_alt = Map of the drainage basins of the Williamson, Sprague, and Klamath Rivers
| map1 = Oregon Locator Map.PNG
| map1_size = 300
| map1_caption = Location of the mouth of Williamson River in Oregon
| map1_alt =
| map1_locator = Oregon

| commons =
}}
The Williamson River of south-central Oregon in the United States is about long.〔U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. (The National Map ), accessed March 9, 2011〕 It drains about east of the Cascade Range.〔 Together with its principal tributary, the Sprague River, it provides over half the inflow to Upper Klamath Lake,〔 the largest freshwater lake in Oregon. The lake's outlet is the Link River, which flows into Lake Ewauna and the Klamath River.〔
The Williamson rises from a large spring in central Klamath County, on the north side of Fuego Mountain, in the Winema National Forest, about northeast of Klamath Falls. It flows in a large arc north through the mountains, then west, then southwest through Klamath Marsh and the Klamath Marsh National Wildlife Refuge. Downstream of the refuge, the river flows roughly parallel to U.S. Route 97, receiving Spring Creek from the right at Collier Memorial State Park, about north of Chiloquin. At Chiloquin, it receives the Sprague River from the left at about river mile (RM) 11 or river kilometer (RK) 18. The Williamson enters the northern end of Upper Klamath Lake near Modoc Point, about northwest of Klamath Falls.
At lower elevations along big streams, the Williamson watershed supports irrigated pastures and other farmlands. Livestock grazing occurs in many locations in the basin. Forests, often cut for timber, cover about 81 percent of the basin and farms account for 6 percent, while range, wetlands, water, and urban areas cover a combined 13 percent. Precipitation in the basin, which lies in the rain shadow of the Cascade Range, averages a year along the Williamson above its confluence with the Sprague and about along the Sprague.〔
The Williamson is known for especially large wild Great Basin redband trout, which move into the river to spawn and to escape Upper Klamath Lake when it gets warm. Three-year-old fish "commonly reach 20 inches or better." Smaller numbers of brown trout also thrive in the Williamson, especially below Spring Creek. Lost River suckers also populate the river but are protected and cannot be caught and kept legally. Smaller rainbow trout and brook trout live in the river above Klamath Marsh. Much of the land along the river is privately owned, and public access is limited.〔
Since 2003, The Nature Conservancy and other organizations have been working to restore about of wetlands in the Williamson River delta at the north end of Upper Klamath Lake. Formerly diked and drained for farming, the delta provides habitat for millions of migrating birds as well as many native species of fish, mollusks, and aquatic plants.
==See also==

*List of longest streams of Oregon

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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