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- Main_stem abstract "In hydrology, a main stem is "the primary downstream segment of a river, as contrasted to its tributaries". Another common term for the main stem, the final large channel of a riverine system, is the trunk. Water enters the main stem from the river's drainage basin, the land area through which the main stem and its tributaries flow. A drainage basin may also be referred to as a watershed or catchment. Hydrological classification systems assign numbers to tributaries and main stems within a drainage basin. In the Strahler number, a modification of a system devised by Robert E. Horton in 1945, channels with no tributaries are called "first-order" streams. When two first-order streams meet, they are said to form a second-order stream; when two second-order streams meet, they form a third-order stream, and so on. In the Horton system, the entire main stem of a drainage basin was assigned the highest number in that basin. However, in the Strahler system, adopted in 1957, only that part of the main stem below the tributary of the next highest rank gets the highest number.In the United States, the Mississippi River main stem achieves a Strahler number of 10, the highest in the nation. Eight rivers, including the Columbia River, reach 9. Streams with no tributaries, assigned the Strahler number 1, are most common. More than 1.5 million of these small streams, with average drainage basins of only 1 square mile (2.6 km2), have been identified in the United States alone.".
- Main_stem thumbnail Mississippirivermapnew.jpg?width=300.
- Main_stem wikiPageID "11876727".
- Main_stem wikiPageRevisionID "604772439".
- Main_stem hasPhotoCollection Main_stem.
- Main_stem subject Category:Fluvial_landforms.
- Main_stem subject Category:Rivers.
- Main_stem subject Category:Water_streams.
- Main_stem type BodyOfWater109225146.
- Main_stem type PhysicalEntity100001930.
- Main_stem type River109411430.
- Main_stem type Rivers.
- Main_stem type Stream109448361.
- Main_stem type Thing100002452.
- Main_stem type WaterStreams.
- Main_stem type YagoGeoEntity.
- Main_stem type YagoPermanentlyLocatedEntity.
- Main_stem comment "In hydrology, a main stem is "the primary downstream segment of a river, as contrasted to its tributaries". Another common term for the main stem, the final large channel of a riverine system, is the trunk. Water enters the main stem from the river's drainage basin, the land area through which the main stem and its tributaries flow. A drainage basin may also be referred to as a watershed or catchment.".
- Main_stem label "Fleuve".
- Main_stem label "Hoofdrivier".
- Main_stem label "Main stem".
- Main_stem label "Rio principal".
- Main_stem label "Strom (Gewässer)".
- Main_stem label "Основное течение реки".
- Main_stem label "幹流".
- Main_stem sameAs Strom_(Gewässer).
- Main_stem sameAs Fleuve.
- Main_stem sameAs Hoofdrivier.
- Main_stem sameAs Rio_principal.
- Main_stem sameAs m.02rwgwf.
- Main_stem sameAs Q573344.
- Main_stem sameAs Q573344.
- Main_stem sameAs Main_stem.
- Main_stem wasDerivedFrom Main_stem?oldid=604772439.
- Main_stem depiction Mississippirivermapnew.jpg.
- Main_stem isPrimaryTopicOf Main_stem.