| 词条 | Middle Fork John Day River |
| 释义 |
| name = Middle Fork John Day River | name_native = | name_native_lang = | name_other = | name_etymology = John Day, fur trapper | image = Middle Fork John Day River.jpg | image_caption = Middle Fork John Day River | image_size = 300 | map = | map_size = 300 | map_caption = | pushpin_map = USA Oregon | pushpin_map_size = 300 | pushpin_map_caption= Location of the mouth of the Middle Fork John Day River in Oregon | subdivision_type1 = Country | subdivision_name1 = United States | subdivision_type2 = State | subdivision_name2 = Oregon | subdivision_type3 = | subdivision_name3 = | subdivision_type4 = County | subdivision_name4 = Grant | subdivision_type5 = | subdivision_name5 = | length = {{convert|73.4|mi|km|abbr=on}}[1] | width_min = | width_avg = | width_max = | depth_min = | depth_avg = | depth_max = | discharge1_location= Ritter, Oregon, {{convert|14.9|mi|km}} from the mouth[2][3] | discharge1_min = {{convert|0.90|cuft/s|m3/s|abbr=on}} | discharge1_avg = {{convert|257|cuft/s|m3/s|abbr=on}}[4][5] | discharge1_max = {{convert|4730|cuft/s|m3/s|abbr=on}} | source1 = Blue Mountains | source1_location = near Austin, Grant County, Oregon | source1_coordinates= {{coord|44|35|05|N|118|25|48|W|display=inline}}[6] | source1_elevation = {{convert|4254|ft|abbr=on}}[6] | mouth = North Fork John Day River | mouth_location = near Slickear Mountain, Grant County, Oregon | mouth_coordinates = {{coord|44|54|59|N|119|18|08|W|display=inline,title}}[7] | mouth_elevation = {{convert|2192|ft|abbr=on}}[7] | progression = | river_system = | basin_size = {{convert|806|sqmi|abbr=on}}[8] | tributaries_left = | tributaries_right = | custom_label = | custom_data = | extra = }} The Middle Fork John Day River is a {{convert|73|mi|km|adj=on}} tributary of the North Fork John Day River in the U.S. state of Oregon. It originates in the Blue Mountains of northeast Oregon in the Malheur National Forest near Austin and flows generally west to the North Fork about {{convert|18|mi|km}} above Monument. The Middle Fork drainage basin covers about {{convert|806|sqmi|km2}}.[8] The Oregon Scenic Waterways Program, administered by the Oregon Parks and Recreation Department (OPRD) protects the river for most of its length. The state lists a {{convert|60|mi|km|adj=on}} segment of the Middle Fork from about {{convert|71|mi|km}} from the mouth to about {{convert|11|mi|km}} from the mouth as a Scenic River Area and the lower {{convert|11|mi|km}} as a Natural River Area. People planning to cut trees, mine, build roads or structures, or to make other substantial changes within {{convert|0.25|mi|km}} of the river must first notify OPRD and seek its approval.[9] See also
References1. ^{{cite web | title = Online Topographic Maps from the United States Geological Survey | publisher = TopoQuest | url = http://www.topoquest.com/map.php?lat=44.584722&lon=-118.43&datum=nad83&zoom=4 | accessdate = October 9, 2008 }} 2. ^{{cite web| title= USGS 14044000 Middle Fork John Day River at Ritter, OR | publisher = United States Geological Survey |year = 2008 | url = http://waterdata.usgs.gov/nwis/uv?14044000 | accessdate = October 9, 2008}} 3. ^The average discharge rate was calculated by adding average annual discharge rates for the 10 calendar years, 1997–2006, from the USGS gauge records and dividing by 10. 4. ^{{cite web| title= USGS 14044000 Middle Fork John Day River at Ritter, OR | publisher = United States Geological Survey |year = 2008 | url = http://waterdata.usgs.gov/nwis/uv?14044000 | accessdate = October 9, 2008}} 5. ^The average discharge rate was calculated by adding average annual discharge rates for the 10 calendar years, 1997–2006, from the USGS gauge records and dividing by 10. 6. ^Source elevation derived from Google Earth search using GNIS source coordinates. 7. ^1 2 {{cite web | work = Geographic Names Information System| publisher = United States Geological Survey | date = November 28, 1980 | url = {{gnis3|1146148}}| title = Middle Fork John Day River | accessdate = October 7, 2008}} 8. ^1 {{cite web | last = Columbia-Blue Mountain Resource Conservation & Development Area | title = John Day Subbasin Revised Draft Plan | publisher = Northwest Power and Conservation Council | year = 2005| url = http://www.nwcouncil.org/fw/subbasinplanning/johnday/plan/PlanRevised.pdf |format = pdf | accessdate = October 9, 2008}} 9. ^{{cite web | title = Scenic Waterways Program | work = Oregon Parks and Recreation Department: Rules and Regulations | publisher = State of Oregon | year = 2008 | url = http://www.oregon.gov/OPRD/RULES/waterways.shtml | accessdate = October 10, 2008 | deadurl = yes | archiveurl = https://web.archive.org/web/20080924213829/http://www.oregon.gov/OPRD/RULES/waterways.shtml | archivedate = September 24, 2008 | df = }} 2 : Rivers of Oregon|Rivers of Grant County, Oregon |
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