Knowledge

River source

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386: 45: 164:. But it also follows the first definition above (along with virtually all other geographic authorities and publications) in using the combined Missouri—lower Mississippi length figure in lists of lengths of rivers around the world. Most rivers have numerous tributaries and change names often; it is customary to regard the longest tributary or stem as the source, regardless of what name that watercourse may carry on local maps and in local usage. 281: 135: 156:(USGS) states that a river's "length may be considered to be the distance from the mouth to the most distant headwater source (irrespective of stream name), or from the mouth to the headwaters of the stream commonly known as the source stream". As an example of the second definition above, the USGS at times considers the 210:
Under this definition, neither a lake (excepting lakes with no inflows) nor a confluence of tributaries can be a true river source, though both often provide the starting point for the portion of a river carrying a single name. For example, National Geographic and virtually every other geographic
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official on a USGS site, that " generally follow the longest tributary to identify the source of rivers and streams." In the case of the Missouri River, this would have the source be well upstream from Lewis and Clark's confluence, "following the Jefferson River to the
183:. The latter definition includes sometimes-dry channels and removes any possible definitions that would have the river source "move around" from month to month depending on precipitation or ground water levels. This definition, from geographer Andrew Johnston of the 215:'s outlet where the name "Nile" first appears, which would reduce the Nile's length by over 900 km (560 mi) (dropping it to fourth or fifth on the list of world's rivers), but instead use the source of the largest river flowing 415:
The furthest stream is also often called the head stream. Headwaters are often small streams with cool waters because of shade and recently melted ice or snow. They may also be glacial headwaters, waters formed by the melting of
430:, as opposed to the outflow or discharge of a watershed. The river source is often but not always on or quite near the edge of the watershed, or watershed divide. For example, the source of the 703: 234:
When not listing river lengths, however, alternative definitions may be used. The Missouri River's source is named by some USGS and other federal and state agency sources, following
223:. Likewise, the source of the Amazon River has been determined this way, even though the river changes names numerous times along its course. However, the source of the 855: 568:
The verb "rise" can be used to express the general region of a river's source, and is often qualified with an adverbial expression of place. For example:
532: 496: 765: 664: 707: 250:, rather than the source of its longest tributary (the Jefferson). This contradicts the most common definition, which is, according to a 848: 789: 1086: 1454: 167:
This most commonly identified definition of a river source specifically uses the most distant point (along watercourses from the
404:-like, in which the "uppermost" or most remote section of the marsh would be the true source. For example, the source of the 251: 841: 353: 325: 372: 332: 310: 2080: 1611: 643: 483: 153: 2075: 306: 227:
in England is traditionally reckoned according to the named river Thames rather than its longer tributary, the
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but is "in a location that is the farthest, along water miles, from where that river ends."
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Sometimes the source of the most remote tributary may be in an area that is more
247: 179:), or, alternatively, as the furthest point from which water could possibly flow 115: 761: 1951: 1835: 1815: 1697: 1682: 1569: 1554: 1549: 1509: 1489: 1401: 1243: 1223: 1188: 1120: 1105: 1012: 934: 894: 471: 439: 431: 427: 172: 157: 99: 833: 114:
begin accumulating into a more substantial and consistent flow that becomes a
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U.S. Geological Survey Geographic Names Information System: Mississippi River
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geographic feature, with only one mouth and one source. For an example, the
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U.S. Geological Survey Geographic Names Information System: Missouri River
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with another river. Each headwater is considered one of the river's
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The White Nile rises in the Great Lakes region of central Africa.
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authority and atlas define the source of the Nile River not as
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rather than rivers or streams, refers to the lake's
665:"National Geographic News @ nationalgeographic.com" 191:when pinpointing the source of rivers such as the 762:"Owens Valley Particulate Matter Plan: Q & A" 2093: 828:Watersheds: Processes, Assessment and Management 122:downstream of the headwaters is regarded as the 30:"Headwater" redirects here. For other uses, see 863: 790:"Limnological investigations in Lake San Pablo" 529:, Length: 2,540 miles (4,090 km), Source: 493:, Length: 2,340 miles (3,770 km), Source: 242:'s naming convention, as the confluence of the 203:agrees, stating that a river source is never a 118:of that river. The tributary with the longest 849: 776:...the Owens River, the source of the lake... 811:...source of the lake is the River Itambi... 788:Jorge Enrique Casallas Guzmán (2004-02-11). 684: 682: 426:Headwater areas are the upstream areas of a 629: 474:sources are officially defined as follows: 309:. Unsourced material may be challenged and 856: 842: 572:The River Thames rises in Gloucestershire. 690:"The True Utmost Reaches of the Missouri" 679: 373:Learn how and when to remove this message 231:— although not without contention. 384: 133: 43: 1455:International scale of river difficulty 14: 2094: 720: 837: 637:"Largest Rivers in the United States" 480:"Largest Rivers in the United States" 199:. A definition given by the state of 70:is the farthest point on each of its 741:"CERC Science Topic: Missouri River" 307:adding citations to reliable sources 274: 579:The word "source", when applied to 175:from which water runs year-around ( 24: 270: 25: 2128: 563: 279: 1612:Flooded grasslands and savannas 820: 766:Environmental Protection Agency 644:United States Geological Survey 484:United States Geological Survey 154:United States Geological Survey 781: 754: 733: 714: 696: 657: 13: 1: 721:Bailey, David (15 May 2012). 622: 129: 1778:Universal Soil Loss Equation 1728:Hydrological transport model 1622:Storm Water Management Model 7: 669:news.nationalgeographic.com 590: 189:National Geographic Society 98:, as it is the place where 10: 2133: 1282:Antecedent drainage stream 597:Source of the Amazon River 453: 252:US Army Corps of Engineers 36: 32:Headwater (disambiguation) 29: 2046: 2018:River valley civilization 1980: 1919: 1901:Riparian-zone restoration 1801: 1663: 1635: 1536: 1508: 1440: 1262: 1129: 1046: 968: 879: 826:DeBarry, Paul A. (2004). 263:, then Red Rock Creek to 27:Starting point of a river 2081:Countries without rivers 2056:Rivers by discharge rate 1768:Runoff model (reservoir) 1733:Infiltration (hydrology) 830:. John Wiley & Sons. 1753:River Continuum Concept 1518:Agricultural wastewater 185:Smithsonian Institution 2076:River name etymologies 2003:Hydraulic civilization 1861:Floodplain restoration 1637:Point source pollution 1412:Sedimentary structures 548:45.92750°N 111.50806°W 397: 187:, is also used by the 160:as a tributary of the 149: 55: 1688:Discharge (hydrology) 1650:Industrial wastewater 1131:Sedimentary processes 512:47.23944°N 95.20806°W 388: 137: 116:first-order tributary 47: 37:For the company, see 1793:Volumetric flow rate 1377:Riffle-pool sequence 748:infolink.cr.usgs.gov 553:45.92750; -111.50806 303:improve this section 142:, Italy, inscribed: 1967:Whitewater kayaking 1962:Whitewater canoeing 1763:Runoff curve number 1607:Flood pulse concept 544: /  517:47.23944; -95.20806 508: /  51:near its source at 2112:Freshwater ecology 1993:Aquatic toxicology 1906:Stream restoration 1871:Infiltration basin 1723:Hydrological model 1239:Sediment transport 1062:Estavelle/Inversac 940:Subterranean river 675:on April 13, 2001. 607:Spring (hydrology) 602:Source of the Nile 436:Continental Divide 398: 265:Hell Roaring Creek 150: 74:upstream from its 56: 2107:Fluvial landforms 2089: 2088: 2066:Whitewater rivers 1972:Whitewater slalom 1803:River engineering 1703:Groundwater model 1664:River measurement 1592:Flood forecasting 1407:Sedimentary basin 1264:Fluvial landforms 1169:Bed material load 945:River bifurcation 468:Mississippi River 383: 382: 375: 357: 162:Mississippi River 144:Here is born the 16:(Redirected from 2124: 2117:River morphology 2051:Rivers by length 1886:River morphology 1788:Wetted perimeter 1693:Drainage density 1204:Headward erosion 1033:Perennial stream 905:Blackwater river 858: 851: 844: 835: 834: 814: 813: 808: 807: 801: 795:. Archived from 794: 785: 779: 778: 773: 772: 758: 752: 751: 745: 737: 731: 730: 718: 712: 711: 706:. Archived from 700: 694: 693: 686: 677: 676: 671:. Archived from 661: 655: 654: 652: 650: 641: 633: 559: 558: 556: 555: 554: 549: 545: 542: 541: 540: 537: 523: 522: 520: 519: 518: 513: 509: 506: 505: 504: 501: 487: 462:is considered a 392:, source of the 378: 371: 367: 364: 358: 356: 315: 283: 275: 257:Beaverhead River 248:Jefferson Rivers 21: 2132: 2131: 2127: 2126: 2125: 2123: 2122: 2121: 2092: 2091: 2090: 2085: 2061:Drainage basins 2042: 1976: 1915: 1891:Retention basin 1851:Erosion control 1846:Detention basin 1797: 1713:Hjulström curve 1665: 1659: 1631: 1575:Non-water flood 1532: 1504: 1450:Helicoidal flow 1436: 1337:Fluvial terrace 1332:Floating island 1258: 1133: 1125: 1116:Rhythmic spring 1050: 1042: 1023:Stream gradient 964: 950:River ecosystem 915:Channel pattern 883: 875: 862: 823: 818: 817: 805: 803: 799: 792: 786: 782: 770: 768: 760: 759: 755: 743: 739: 738: 734: 719: 715: 702: 701: 697: 688: 687: 680: 663: 662: 658: 648: 646: 639: 635: 634: 630: 625: 612:Strahler number 593: 566: 552: 550: 546: 543: 538: 535: 533: 531: 530: 516: 514: 510: 507: 502: 499: 497: 495: 494: 478: 456: 438:separating the 379: 368: 362: 359: 316: 314: 300: 284: 273: 271:Characteristics 132: 100:surface runoffs 42: 35: 28: 23: 22: 15: 12: 11: 5: 2130: 2120: 2119: 2114: 2109: 2104: 2087: 2086: 2084: 2083: 2078: 2073: 2068: 2063: 2058: 2053: 2047: 2044: 2043: 2041: 2040: 2035: 2030: 2025: 2020: 2015: 2010: 2005: 2000: 1995: 1990: 1984: 1982: 1978: 1977: 1975: 1974: 1969: 1964: 1959: 1954: 1952:Stone skipping 1949: 1944: 1939: 1934: 1929: 1923: 1921: 1917: 1916: 1914: 1913: 1908: 1903: 1898: 1893: 1888: 1883: 1878: 1873: 1868: 1863: 1858: 1853: 1848: 1843: 1838: 1836:Drop structure 1833: 1828: 1823: 1818: 1816:Balancing lake 1813: 1807: 1805: 1799: 1798: 1796: 1795: 1790: 1785: 1780: 1775: 1770: 1765: 1760: 1755: 1750: 1745: 1743:Playfair's law 1740: 1735: 1730: 1725: 1720: 1715: 1710: 1705: 1700: 1698:Exner equation 1695: 1690: 1685: 1683:Bradshaw model 1680: 1675: 1669: 1667: 1661: 1660: 1658: 1657: 1652: 1647: 1641: 1639: 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in the US 1084: 1074: 1069: 1064: 1058: 1056: 1044: 1043: 1041: 1040: 1035: 1030: 1025: 1020: 1015: 1013:Stream channel 1010: 1005: 1000: 995: 990: 985: 980: 974: 972: 966: 965: 963: 962: 957: 952: 947: 942: 937: 935:Drainage basin 932: 927: 922: 917: 912: 907: 902: 897: 895:Alluvial river 891: 889: 877: 876: 861: 860: 853: 846: 838: 832: 831: 822: 819: 816: 815: 780: 753: 732: 713: 710:on 2011-06-15. 695: 678: 656: 627: 626: 624: 621: 620: 619: 614: 609: 604: 599: 592: 589: 577: 576: 573: 565: 564:Related usages 562: 561: 560: 524: 488: 472:Missouri River 455: 452: 446:watersheds of 440:Atlantic Ocean 432:Colorado River 381: 380: 322:"River source" 287: 285: 278: 272: 269: 261:Red Rock River 219:the lake, the 173:drainage basin 158:Missouri River 131: 128: 26: 18:Source (river) 9: 6: 4: 3: 2: 2129: 2118: 2115: 2113: 2110: 2108: 2105: 2103: 2102:Water streams 2100: 2099: 2097: 2082: 2079: 2077: 2074: 2072: 2069: 2067: 2064: 2062: 2059: 2057: 2054: 2052: 2049: 2048: 2045: 2039: 2036: 2034: 2033:Surface water 2031: 2029: 2028:Sacred waters 2026: 2024: 2021: 2019: 2016: 2014: 2013:Riparian zone 2011: 2009: 2006: 2004: 2001: 1999: 1998:Body of water 1996: 1994: 1991: 1989: 1986: 1985: 1983: 1979: 1973: 1970: 1968: 1965: 1963: 1960: 1958: 1955: 1953: 1950: 1948: 1947:Riverboarding 1945: 1943: 1942:River surfing 1940: 1938: 1935: 1933: 1930: 1928: 1925: 1924: 1922: 1918: 1912: 1909: 1907: 1904: 1902: 1899: 1897: 1894: 1892: 1889: 1887: 1884: 1882: 1879: 1877: 1874: 1872: 1869: 1867: 1864: 1862: 1859: 1857: 1854: 1852: 1849: 1847: 1844: 1842: 1839: 1837: 1834: 1832: 1829: 1827: 1824: 1822: 1819: 1817: 1814: 1812: 1809: 1808: 1806: 1804: 1800: 1794: 1791: 1789: 1786: 1784: 1781: 1779: 1776: 1774: 1771: 1769: 1766: 1764: 1761: 1759: 1756: 1754: 1751: 1749: 1746: 1744: 1741: 1739: 1736: 1734: 1731: 1729: 1726: 1724: 1721: 1719: 1716: 1714: 1711: 1709: 1706: 1704: 1701: 1699: 1696: 1694: 1691: 1689: 1686: 1684: 1681: 1679: 1676: 1674: 1671: 1670: 1668: 1666:and modelling 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1528:Urban runoff 1442:Fluvial flow 1427:River valley 1397:River island 1362:Meander scar 1277:Alluvial fan 1219:Progradation 1094:Karst spring 1038:Winterbourne 993:Chalk stream 955:River source 954: 930:Distributary 827: 821:Bibliography 810: 804:. Retrieved 797:the original 783: 775: 769:. Retrieved 756: 747: 735: 726: 716: 708:the original 698: 673:the original 668: 659: 647:. Retrieved 631: 578: 567: 463: 459: 457: 425: 414: 399: 390:Rhume Spring 369: 360: 350: 343: 336: 329: 317: 301:Please help 289: 233: 221:Kagera River 216: 209: 166: 151: 143: 112:spring water 95: 59: 57: 1932:Fly fishing 1856:Fish ladder 1841:Daylighting 1560:Flash flood 1523:First flush 1470:Plunge pool 1194:Downcutting 1179:Debris flow 1154:Aggradation 1028:Stream pool 551: / 539:111°30′29″W 515: / 181:ephemerally 177:perennially 169:river mouth 72:tributaries 39:RiverSource 2096:Categories 2038:Wild river 1718:Hydrograph 1708:Hack's law 1673:Baer's law 1617:Inundation 1602:Floodplain 1542:stormwater 1500:Whitewater 1372:Oxbow lake 1209:Knickpoint 1184:Deposition 1077:Hot spring 1018:Streamflow 1008:Stream bed 925:Confluence 806:2008-05-30 771:2008-05-30 649:24 October 623:References 617:Water well 536:45°55′39″N 503:95°12′29″W 500:47°14′22″N 434:is at the 406:River Tees 363:March 2023 333:newspapers 205:confluence 130:Definition 92:confluence 53:Farringdon 2008:Limnology 1957:Triathlon 1927:Canyoning 1896:Revetment 1826:Check dam 1738:Main stem 1495:Waterfall 1382:Point bar 1367:Mouth bar 1307:Billabong 1254:Water gap 1249:Wash load 1229:Saltation 1149:Anabranch 1072:Holy well 960:Tributary 428:watershed 410:marshland 290:does not 171:) in the 124:main stem 108:meltwater 104:rainwater 60:headwater 49:River Wey 1811:Aqueduct 1678:Baseflow 1645:Effluent 1322:Cut bank 1287:Avulsion 1164:Bed load 1144:Abrasion 727:BBC News 591:See also 140:Crissolo 1988:Aquifer 1981:Related 1937:Rafting 1465:Meander 1460:Log jam 1422:Thalweg 1327:Estuary 1199:Erosion 1136:erosion 1048:Springs 1003:Current 970:Streams 910:Channel 873:springs 869:streams 454:Example 418:glacial 347:scholar 311:removed 296:sources 244:Madison 201:Montana 110:and/or 96:sources 90:or its 82:into a 80:estuary 1783:WAFLEX 1655:Sewage 1538:Floods 1480:Riffle 1475:Rapids 1417:Strath 1387:Ravine 1312:Canyon 1067:Geyser 998:Coulee 983:Bourne 978:Arroyo 881:Rivers 865:Rivers 585:inflow 464:linear 349:  342:  335:  328:  320:  225:Thames 193:Amazon 120:course 68:stream 1881:Levee 1866:Flume 1821:Canal 1565:Flood 1485:Shoal 1352:Gully 1347:Gulch 1317:Chine 1302:Bayou 1159:Armor 1111:Ponor 886:lists 800:(PDF) 793:(PDF) 744:(PDF) 640:(PDF) 581:lakes 460:river 402:marsh 396:river 394:Rhume 354:JSTOR 340:books 240:Clark 236:Lewis 229:Churn 102:from 76:mouth 64:river 62:of a 1911:Weir 1876:Leat 1540:and 1432:Wadi 1392:Rill 1357:Glen 1342:Gill 1292:Bank 1134:and 1099:list 1082:list 1053:list 988:Burn 871:and 651:2009 470:and 442:and 326:news 294:any 292:cite 246:and 238:and 217:into 197:Nile 152:The 84:lake 58:The 1831:Dam 1297:Bar 1272:Ait 421:ice 408:is 305:by 267:." 259:to 195:or 88:sea 66:or 2098:: 867:, 809:. 774:. 764:. 746:. 725:. 681:^ 667:. 642:. 587:. 482:. 458:A 450:. 423:. 412:. 146:Po 126:. 106:, 1055:) 1051:( 888:) 884:( 857:e 850:t 843:v 750:. 729:. 692:. 653:. 486:. 376:) 370:( 365:) 361:( 351:· 344:· 337:· 330:· 313:. 299:. 86:/ 78:/ 41:. 34:. 20:)

Index

Source (river)
Headwater (disambiguation)
RiverSource

River Wey
Farringdon
river
stream
tributaries
mouth
estuary
lake
sea
confluence
surface runoffs
rainwater
meltwater
spring water
first-order tributary
course
main stem

Crissolo
Po
United States Geological Survey
Missouri River
Mississippi River
river mouth
drainage basin
perennially

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