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alluvial

alluvial  

Applied to the environments, action, and products of rivers or streams. Alluvial deposits (alluvium) are clastic, detrital materials transported by a stream or river and deposited as the river ...
alluvium

alluvium  

Loosely compacted sediment that is deposited by a river, which can include particles ranging in size from clay, silt and sand, to gravel. Stones and boulders are often worn by the water into rounded ...
avulsion

avulsion  

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The rapid and easily perceived increase in a parcel of land due to natural occurrences such as the sudden change in a river's course (cf accretion), which does not affect ...
backswamp

backswamp  

Area of low, ill-drained ground on a floodplain away from the main channel. It stands slightly lower than adjacent alluvial fans extending from the valley sides, and is below natural levées that rise ...
bankfull flow

bankfull flow  

Maximum amount of discharge (usually measured in m3/s) that a stream channel can carry without overflowing. Its frequency of occurrence varies between streams, from a few times each year to once ...
channel storage

channel storage  

The volume of water that is temporarily stored in a river channel and its floodplain while it flows towards an outlet (such as a lake, reservoir, or estuary).
cut-off

cut-off  

A section of a river channel that no longer carries the main discharge. Its abandonment results from meander development associated with lateral channel migration across a flood-plain. Channel length ...
Entisols

Entisols  

Embryonic mineral soils, including those that have no distinct pedogenic horizons. Representing only the initiation of soil-profile development, entisols are common on recent flood plains, steep ...
flood

flood  

Floods occur when peak discharge exceeds channel capacity, and this may be brought about naturally by intense precipitation (Wilson and Rashid (2005) Canad. Geogr./Géog. canad. 49, 1), snow- and ...
floodplain zoning

floodplain zoning  

A type of natural resource zoning that prohibits and restricts development within floodplains, in order to prevent damage to property and risks to people. See also prohibition zoning.
floodway

floodway  

The river channel and parts of the adjacent floodplain that are required to carry flood water and must therefore not be built on or restricted.
fluvent

fluvent  

A floodplain soil, that usually has buried horizons and amounts of organic matter that decrease irregularly with depth.
heterolithic bedding

heterolithic bedding  

A closely interbedded deposit of sand and mud, generated in environments where current flow varies considerably. The three main types of heterolithic bedding are called flaser, wavy, and lenticular. ...
lateral accretion

lateral accretion  

The build-up of sediments, as in a recurved spit (Kumar and Sanders (1974) Sedimentol. 21, 4), or a meander (Brooks (2003) Geomorph. 54, 3–4).
levée

levée  

1 Raised embankment of a river, showing a gentle slope away from the channel. It results from periodic overbank flooding, when coarser sediment is immediately deposited due to a reduction in ...
meander

meander  

A curve or bend in a river channel, which forms naturally by fluvial erosion. See also floodplain, ox‐bow lake.Fig 13 Meander
multistory sandbody

multistory sandbody  

A series of sandstone beds, each deposited by the infilling of a river channel, stacked one above the other with little or no intervening mudstone. The multistorey body is formed by the repeated and ...
overbank deposit

overbank deposit  

A floodplain sediment that lies beyond the limits of the river channel and was left by floodwaters that had overflowed the river banks.
ox-bow lake

ox-bow lake  

A lake that is formed on the floodplain of an alluvial river when the river cuts through the narrow neck of a large meander. Also known as a cut‐off.
panplain

panplain  

An area of very subdued relief that consists of coalesced flood-plains. It is, therefore, owing to lateral stream migration and is a component of a peneplain. Good examples are found in the ...

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