| 词条 | John River (Alaska) |
| 释义 |
| name = John River | name_native = | name_native_lang = | name_other = | name_etymology = | image = John River.jpg | image_caption = John River near Bettles | image_size = 300 | map = | map_size = 300 | map_caption = | pushpin_map = USA Alaska | pushpin_map_size = 300 | pushpin_map_caption= Location of the mouth of the John River in Alaska | subdivision_type1 = Country | subdivision_name1 = United States | subdivision_type2 = State | subdivision_name2 = Alaska | subdivision_type3 = | subdivision_name3 = | subdivision_type4 = District | subdivision_name4 = North Slope Borough, Yukon–Koyukuk Census Area | subdivision_type5 = | subdivision_name5 = | length = {{convert|125|mi|km|abbr=on}}[1] | width_min = | width_avg = | width_max = | depth_min = | depth_avg = | depth_max = | discharge1_location= | discharge1_min = | discharge1_avg = | discharge1_max = | source1 = confluence of Contact and Inukpasugruk creeks | source1_location = Endicott Mountains, Brooks Range, North Slope Borough | source1_coordinates= {{coord|68|07|34|N|151|45|23|W|display=inline}}[1] | source1_elevation = {{convert|2076|ft|abbr=on}}[2] | mouth = Koyukuk River[3] | mouth_location = {{convert|1|mi|km|0}} northeast of Bettles, Yukon–Koyukuk Census Area | mouth_coordinates = {{coord|66|54|49|N|151|39|13|W|display=inline,title}}[1] | mouth_elevation = {{convert|600|ft|abbr=on}}[1] | progression = | river_system = | basin_size = | tributaries_left = | tributaries_right = | custom_label = | custom_data = | extra = {{Designation list | embed = yes | designation1 = nwsr | designation1_type = Wild | designation1_date = December 2, 1980 | designation1_number = }} }} John River leads here. For Canadian rapper John River, see John River (rapper) The John River is a {{convert|125|mi|km|adj=on}} tributary of the Koyukuk River in the northern part of the U.S. state of Alaska.[3] It was named after John Bremner, a prospector and explorer who was one of the first non-native persons to go there.[3] It flows south from Anaktuvuk Pass in Alaska's Brooks Range, into the larger river at a point near Bettles,[3] slightly north of the Arctic Circle.[4] In 1980, the {{convert|52|mi|km|adj=on}} segment of the John River within the Gates of the Arctic National Park and Preserve were designated "wild" and added to the National Wild and Scenic Rivers System.[5] The designation means that the segment is unpolluted, free-flowing, and generally inaccessible except by trail.[6] The John River Valley is an important migration route for Arctic caribou.[5] BoatingIt is possible to run the John River in canoes, kayaks, and small rafts, though conditions vary from place to place. The upper {{convert|35|mi|km}} are rated Class III (difficult) on the International Scale of River Difficulty and "should be attempted only by experienced paddlers with solid wilderness skills."[7] Below this, the river is rated Class II (medium) for the next {{convert|47|mi|km}}, then Class I on the lower reaches all the way to the mouth. Dangers on the upper river include sustained whitewater, swift currents, a difficult {{convert|4|mi|km|0|adj=on}} portage, and the possibility of water too shallow to run.[7] See also
References1. ^1 2 {{cite web | work = Geographic Names Information System| publisher = United States Geological Survey | date = January 1, 2000| url = {{gnis3|1404173}} | title = John River| accessdate = October 20, 2013}} 2. ^Derived by entering source coordinates in Google Earth. 3. ^1 2 3 4 {{cite book|last=Orth|first=Donald J.|author2=United States Geological Survey|title=Dictionary of Alaska Place Names: Geological Survey Professional Paper 567|url=http://137.229.113.112/webpubs/usgs/p/text/p0567.pdf|format=PDF|agency=United States Government Printing Office|publisher=University of Alaska Fairbanks|year=1971|origyear=1967|page=475|accessdate=October 13, 2013|deadurl=yes|archiveurl=https://web.archive.org/web/20131017165933/http://137.229.113.112/webpubs/usgs/p/text/p0567.pdf|archivedate=October 17, 2013|df=}} 4. ^{{cite book|title=Alaska Atlas & Gazetteer|publisher=DeLorme|location=Yarmouth, Maine|page=136|edition=7th|year=2010|isbn=978-0-89933-289-5}} 5. ^1 {{cite web|title=John River, Alaska|publisher=National Wild and Scenic Rivers System|url=http://www.rivers.gov/rivers/john.php|accessdate=October 20, 2013}} 6. ^{{cite web|title=About the WSR Act|publisher=National Wild and Scenic Rivers System|url=http://www.rivers.gov/wsr-act.php|accessdate=October 20, 2013}} 7. ^1 {{cite book|last=Jettmar|first=Karen|title=The Alaska River Guide: Canoeing, Kayaking, and Rafting in the Last Frontier|publisher=Menasha Ridge Press|location=Birmingham, Alabama|edition=3rd|year=2008|origyear=1993|pages=118–19|isbn=978-0-89732-957-6}} External links
8 : Rivers of North Slope Borough, Alaska|Rivers of Alaska|Wild and Scenic Rivers of the United States|Rivers of Yukon–Koyukuk Census Area, Alaska|Gates of the Arctic National Park and Preserve|Brooks Range|Tributaries of the Yukon River|Rivers of Unorganized Borough, Alaska |
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