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〕 | mouth_name = Columbia River | mouth_location = Washougal and Camas | mouth_district = Clark County | mouth_region = | mouth_state = | mouth_country = | mouth_note = | mouth_lat_d = 45 | mouth_lat_m = 34 | mouth_lat_s = 43 | mouth_lat_NS = N | mouth_long_d = 122 | mouth_long_m = 24 | mouth_long_s = 00 | mouth_long_EW = W | mouth_coordinates_note = 〔 | mouth_elevation_imperial = 10 | mouth_elevation_note = 〔 | length_imperial = 33 | length_note = | length_round = 0 | watershed_imperial = 212 | watershed_round = 0 | watershed_note = 〔 | discharge_location = | discharge_round = 0 | discharge_imperial = 873 | discharge_note = 〔 The maximum discharge was recorded during the flood of December 1977.〕 | discharge_min_imperial = | discharge_max_imperial = 40400 | discharge1_location = | discharge1_imperial = | discharge1_note = | map = | map_size = | map_caption = |map_alt = | map1 = Washington Locator Map.PNG | map1_size = 300 | map1_caption = Location of the mouth of Washougal River in Washington | map1_alt = | map1_locator = Washington | commons = }} The Washougal River is a tributary of the Columbia River in the U.S. state of Washington.〔 Its headwaters and upper are in Skamania County in the Gifford Pinchot National Forest, and its lower are in Clark County. The river, which meets the Columbia near the cities of Washougal and Camas, is a popular stream for fishing, swimming, and boating.〔 Explorers Meriwether Lewis and William Clark referred to the Washougal River as the "Seal River." The name Washougal comes from the Cascades Chinook placename ''()'' or ''()'', meaning "rushing water". It has been suggested that D. B. Cooper, who hijacked a Boeing 727 in 1971 then parachuted from the plane with ransom money, may have landed in the Washougal River basin. ==Watershed== The Washougal River drains of land that is largely forested, especially in its upper reaches in the Cascade Range and its foothills. Of the total, are in Skamania County, and the remaining are in Clark County.〔 Small farms and rural homes are found along the lower part of the basin, and two small Clark County cities, Camas and Washougal, are at the river mouth. About 63 percent of the watershed is forested; 21 percent is devoted to fields, pastures, bare earth, and shrubland, and 16 percent is developed or cleared for development.〔 The water quality of surface streams in the basin is rated "excellent" to "good" with few exceptions.〔 State and county officials monitor the lower reaches of the river for signs of trouble such as harmful bacteria, elevated water temperatures, and bank erosion related to forest clearing and other development. Two of the river's tributaries, Jones Creek and Boulder Creek, supply drinking water to Camas.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Washougal River」の詳細全文を読む スポンサード リンク
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