EARTHSC 2WW3 Lecture Notes - Lecture 2: Point Bar, Cut Bank, Free Range
1 Feb 2017
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Channel patterns: consider sinuosity of the channel. One of a series of sinuous curves or loops in the main course of the stream. Sr = actual length of the stream straight line length of channel. Sr can never be 1. 5 need to rearrange and calculate it. Common in unconsolidated sediments; particularly when they cut down into bedrock - pools, riffles & thalwegs are present. Deposition on the inside of the meander bend. Erosion on the outside of the meander bend. Cha(cid:374)(cid:374)el (cid:373)ig(cid:396)atio(cid:374) ac(cid:396)oss the floodplai(cid:374) (cid:373)"s to (cid:1005)(cid:1004)"s (cid:373)"s/yea(cid:396) Water can carry larger sediments then if it is moving slow. Get hellcoldal flow-circular flow-water slows down and speeds up and have corkscrew flow causes erosion. Isolated within a valley and water has free range to go back and forth within that valley. Oxbow lake crescent shaped lake formed where a meander is cut off from a stream. Uncontained rivers in all directions and change hourly, minutely, daly and split up.
