A river mouth is where a river flows into a larger body of water, such as another river, a lake/reservoir, a bay/gulf, a sea, or an ocean.[1] At the river mouth, sediments are often deposited due to the slowing of the current, reducing the carrying capacity of the water.[1] The water from a river can enter the receiving body in a variety of different ways.[1] The motion of a river is influenced by the relative density of the river compared to the receiving water, the rotation of the Earth, and any ambient motion in the receiving water, such as tides or seiches.[2]
If the river water has a higher density than the surface of the receiving water, the river water will plunge below the surface. The river water will then either form an underflow or an interflow within the lake. However, if the river water is lighter than the receiving water, as is typically the case when fresh river water flows into the sea, the river water will float along the surface of the receiving water as an overflow.
At the mouth of a river, the change in flow condition can cause the river to drop any sediment it is carrying. This sediment deposition can generate a variety of landforms, such as deltas, sand bars, spits, and tie channels.[3] Landforms at the river mouth drastically alter the geomorphology and ecosystem. Along coasts, sand bars and similar landforms act as barriers, sheltering sensitive ecosystems that are enriched by nutrients deposited from the river.[4] However, damming of rivers can starve the river of sand and nutrients, creating a deficit at the river mouth.[4]
Cultural influence
As river mouths are the site of large scale sediment deposition and allowed for easy travel and ports, many towns and cities are founded there. Many places in the United Kingdom take their names from their positions at the mouths of rivers, such as Plymouth (i.e. mouth of the Plym River), Sidmouth (i.e. mouth of the Sid River), and Great Yarmouth (i.e. mouth of the Yare River); in Celtic, the term is Aber or Inver. Due to rising sea levels as a result of climate change, the coastal cities are at heightened risk of flooding. Sediment starvation in the river compounds this concern.[4]
^ abcdCharles, Hogg (2014-06-12). The flow of rivers into lakes: Experiments and models (Thesis). University of Cambridge. doi:10.17863/cam.32.
^Ma, Yanxia (2009). Continental Shelf Sediment Transport and Depositional Processes on an Energetic, Active Margin: the Waiapu River Shelf, New Zealand. pp. 2, 19.
^Rowland, J. C.; Dietrich, W. E.; Day, G.; Parker, G. (2009). "Formation and maintenance of single‐thread tie channels entering floodplain lakes: Observations from three diverse river systems". Journal of Geophysical Research. 114 (F2): F02013. Bibcode:2009JGRF..114.2013R. doi:10.1029/2008JF001073.
^ abcFagherazzi, Sergio; Edmonds, Douglas A.; Nardin, William; Leonardi, Nicoletta; Canestrelli, Alberto; Falcini, Federico; Jerolmack, Douglas J.; Mariotti, Giulio; Rowland, Joel C.; Slingerland, Rudy L. (September 2015). "Dynamics of river mouth deposits: DYNAMICS OF RIVER MOUTH DEPOSITS". Reviews of Geophysics. 53 (3): 642–672. doi:10.1002/2014RG000451. S2CID 15884865.
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river, mouth, other, uses, mouth, disambiguation, river, mouth, where, river, flows, into, larger, body, water, such, another, river, lake, reservoir, gulf, ocean, river, mouth, sediments, often, deposited, slowing, current, reducing, carrying, capacity, water. For other uses see Mouth disambiguation A river mouth is where a river flows into a larger body of water such as another river a lake reservoir a bay gulf a sea or an ocean 1 At the river mouth sediments are often deposited due to the slowing of the current reducing the carrying capacity of the water 1 The water from a river can enter the receiving body in a variety of different ways 1 The motion of a river is influenced by the relative density of the river compared to the receiving water the rotation of the Earth and any ambient motion in the receiving water such as tides or seiches 2 Aerial picture of the Ebro river s mouth as it enters into the Mediterranean Sea by the Ebro s delta River mouth of the Xuquer Cullera If the river water has a higher density than the surface of the receiving water the river water will plunge below the surface The river water will then either form an underflow or an interflow within the lake However if the river water is lighter than the receiving water as is typically the case when fresh river water flows into the sea the river water will float along the surface of the receiving water as an overflow Alongside these advective transports inflowing water will also diffuse 1 Contents 1 Landforms 2 Cultural influence 3 See also 4 ReferencesLandforms Edit Aerial picture of the Kinburn Spit At the mouth of a river the change in flow condition can cause the river to drop any sediment it is carrying This sediment deposition can generate a variety of landforms such as deltas sand bars spits and tie channels 3 Landforms at the river mouth drastically alter the geomorphology and ecosystem Along coasts sand bars and similar landforms act as barriers sheltering sensitive ecosystems that are enriched by nutrients deposited from the river 4 However damming of rivers can starve the river of sand and nutrients creating a deficit at the river mouth 4 Cultural influence EditAs river mouths are the site of large scale sediment deposition and allowed for easy travel and ports many towns and cities are founded there Many places in the United Kingdom take their names from their positions at the mouths of rivers such as Plymouth i e mouth of the Plym River Sidmouth i e mouth of the Sid River and Great Yarmouth i e mouth of the Yare River in Celtic the term is Aber or Inver Due to rising sea levels as a result of climate change the coastal cities are at heightened risk of flooding Sediment starvation in the river compounds this concern 4 See also Edit Wikidata has the property mouth of the watercourse P403 see uses Confluence Estuary LimanReferences Edit a b c d Charles Hogg 2014 06 12 The flow of rivers into lakes Experiments and models Thesis University of Cambridge doi 10 17863 cam 32 Ma Yanxia 2009 Continental Shelf Sediment Transport and Depositional Processes on an Energetic Active Margin the Waiapu River Shelf New Zealand pp 2 19 Rowland J C Dietrich W E Day G Parker G 2009 Formation and maintenance of single thread tie channels entering floodplain lakes Observations from three diverse river systems Journal of Geophysical Research 114 F2 F02013 Bibcode 2009JGRF 114 2013R doi 10 1029 2008JF001073 a b c Fagherazzi Sergio Edmonds Douglas A Nardin William Leonardi Nicoletta Canestrelli Alberto Falcini Federico Jerolmack Douglas J Mariotti Giulio Rowland Joel C Slingerland Rudy L September 2015 Dynamics of river mouth deposits DYNAMICS OF RIVER MOUTH DEPOSITS Reviews of Geophysics 53 3 642 672 doi 10 1002 2014RG000451 S2CID 15884865 This hydrology article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title River mouth amp oldid 1141914201, wikipedia, wiki, book, books, library,
