aggradation


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aggradation

[‚ag·rə′dā·shən]
(geology)
(hydrology)
A process of shifting equilibrium of stream deposition, with upbuilding approximately at grade.

aggradation

The addition of a material to the earth’s surface to promote the uniformity of a grade or slope.
References in periodicals archive ?
Aggradation has been severely limited by dams, levees, and embankments that trap silt and starve deltas of new sediments.
It is further proposed here that bioturbation and aggradation processes have also contributed to over-representation of mound deposits as a result of the burial of low-density surface deposits such as stone artefact deposits that may have been associated with other forms of activity occurring near mound sites.
The land above sea level is either being uplifted or built up by aggradation.
New Zealand vineyards are planted mainly on flat alluvium and aggradation gravels with slopes of less than 3[degrees].
In addition, Redwood Creek is currently listed as temperature-and sediment-impaired under the Clean Water Act because of past timber harvest, removal of riparian vegetation, widespread streamside landsliding, and channel aggradation.
Their aim was to tie the phase of aggradation, when huge quantities of gravels were laid down, and the subsequent phase when they were cut through making river terraces, to the timescale established independently from research into cores drilled into the muds of the ocean floor.
This may result in increases in bed material discharge, causing upstream degradation, downstream aggradation, and bank instabilities along ditches and connected tributaries.
A sensibility analysis allowed the identification of parameters and variables that exert the major influences on the aggradation and degradation processes in the river.
0 m of sand and gravel suggesting valley floor aggradation on top of the lake deposits before significant channel degradation took place.
Natural stream reaches that are stable with little aggradation or degradation occurring should be chosen for measurement.
Thereafter, alluvial red beds accumulated, flooding surfaces become fewer and less prominent, and trends of pro-, retro- or aggradation are difficult to establish.
the tribe's nuisance-trespass claims for aggradation (siltation of