An alluvial river is one in which the bed and banks are made up of mobile sediment and/or soil. Alluvial rivers are self-formed, meaning that their channels are shaped by the magnitude and frequency of the floods that they experience, and the ability of these floods to erode, deposit, and transport sediment. For this reason, alluvial rivers can assume a number of forms based on the properties of their banks; the flows they experience; the local riparian ecology; and the amount, size, and type of sediment that they carry.[1]
At a smaller spatial scale and shorter time scale, the patterns of water movement, from events such as seasonal flooding, create different patches of soils that range from aerobic to anaerobic and have differing nutrients and decomposition rates and dynamics. When looking at larger spatial scales, the topographic features have been created by glacial events, such as glaciation and deglaciation, changes in sea-levels, tectonic movements, and other events that occur over longer time scales. These short and long-term scales together determine the patterns and characteristics of alluvial rivers. These rivers also consist of certain topographic features that include hillslopes at the formation of the valley's sides, terraces, remains of old floodplains at higher elevations than the floodplain that is currently active, levees that are natural, meander scrolls, natural drainage channels, and floodplains that are temporary, as well as permanent.[2]
^Leopold, Luna B.; Wolman, M. G.; Miller, J. P. (1964). Fluvial Processes in Geomorphology. San Francisco: W.H. Freeman and Co.
^Ward, J. V.; Stanford, J. A. (September 1995). "Ecological connectivity in alluvial river ecosystems and its disruption by flow regulation". Regulated Rivers: Research & Management. 11 (1): 105–119. doi:10.1002/rrr.3450110109.
An alluvialriver is one in which the bed and banks are made up of mobile sediment and/or soil. Alluvialrivers are self-formed, meaning that their channels...
stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. Alluvium is also sometimes called alluvial deposit. Alluvium is typically...
patches of bedrock and patches of deep alluvial cover are classified as mixed bedrock-alluvial. Alluvialrivers can be further classified by their channel...
An alluvial plain is a plain (a largely flat landform) created by the deposition of sediment over a long period of time by one or more rivers coming from...
An alluvial fan is an accumulation of sediments that fans outwards from a concentrated source of sediments, such as a narrow canyon emerging from an escarpment...
The Mississippi RiverAlluvial Plain is an alluvial plain created by the Mississippi River on which lie parts of seven U.S. states, from southern Louisiana...
it flows into San Pedro Bay. While the river was once free-flowing and frequently flooding, forming alluvial flood plains along its banks, it is currently...
variety of climates and ecosystems during its course. It is considered an alluvialriver, draining a 10,577-square-mile (27,390 km2) drainage basin and carrying...
Sediment Flux in Large AlluvialRiver Channels: Application of a Synoptic Rouse-Based Model to the Irrawaddy and Salween Rivers". Journal of Geophysical...
combination of a bedrock channel and an alluvial channel. The way one can distinguish between bedrock rivers and alluvialrivers is through the extent of sediment...
Sediment Flux in Large AlluvialRiver Channels: Application of a Synoptic Rouse-Based Model to the Irrawaddy and Salween Rivers". Journal of Geophysical...
[mɛ̂ːnáːm tɕâːw pʰráʔ.jāː] or [tɕâːw pʰrā.jāː]) is the major river in Thailand, with its low alluvial plain forming the centre of the country. It flows through...
wide meander of a river is cut off, creating a free-standing body of water. The word "oxbow" can also refer to a U-shaped bend in a river or stream, whether...
common in sections of rivers where the river bed is accumulating sediments (aggrading). Repeated flooding eventually builds up an alluvial ridge, whose natural...
Hogsmill River Hughenden Stream River Lea River Mimram River Misbourne River Pang River Quin River Rib River Stort River Ver River Wandle River Wye Chalk...
type of the bed load of a river. Alluvialrivers with intense accumulations of sediment tend to this behavior. Examples of rivers where artificial levees...
River channel migration is the geomorphological process that involves the lateral migration of an alluvialriver channel across its floodplain. This process...
currently 20 countries and 22 territories that do not have a permanent natural river flowing within them, though some of them have streams or seasonal watercourses...
of continental environments are lagoons, lakes, swamps, floodplains and alluvial fans. In the quiet water of swamps, lakes and lagoons, fine sediment is...
response of a large pristine alluvialriver to tremendous deforestation in the South American Tropics: The case of the Araguaia River". Geomorphology. 113 (3–4):...
continental rifting, and orogenic belts. Eroded sand is transported by rivers or by the wind from its source areas to depositional environments where...
Orange River is often associated with the Grootslang, a mythical being resembling a giant serpent, which is often connected to the river'salluvial diamonds...
record. The building up of land surfaces by sedimentation, particularly in river valleys, is called aggradation. The rate of sedimentation is the thickness...
Myitkyinā is the first defile. Below Bhamo the river makes a sharp westward swing, leaving the Bhamo alluvial basin to cut through the limestone rocks of...
the alluvial plain or stream terrace, which are considered to be "lowlands". The term "bottomland" refers to low-lying alluvial land near a river. Much...
along the entire length of the river, and are an important feature of the middle and lower reaches, with the alluvialriver silt producing fertile soils...
the particles. For example, sand and silt can be carried in suspension in river water and on reaching the sea bed deposited by sedimentation; if buried...
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