aggradation defined in 1939 yearaggradation - Aggradation;
aggradation - Term applied to the process by which rivers build up their beds and fill in their valleys. When rivers are overburdened with silt and flow over an almost level plain in a meandering course, the speed of the stream slackens to so great an extent that it becomes incapable of transporting the whole of the suspended mud, some of which is deposited on the bed and sides of the river. In time the deposits raise the.bed and banks of the river above the surrounding level.
The lower courses of the Nile, Po, Mississippi, and Plate rivers are examples of this process.
near aggradation in Knolik
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