6 - A streams capacity increases sharply as its velocity...

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Accelerated Soil Erosion Colluvium : deposit of sediment or rock particles accumulating from overland flow at the base of a slope and originating from higher slopes where sheet erosion is in progress loose bodies of sediment that have been deposited or built up at the bottom of a low-grade slope or against a barrier on that slope, transported by gravity. Alluvium : any sediment laid by a stream that is found in a stream channel or in low parts of a stream valley subject to flooding. Can choke channels of small streams, making the water flood. Stream Transportation Stream Load : solid matter carried by a stream. It is carried three ways: Dissolved load : transported invisibly as ions Suspended load : clay and silt held within the water; generally the largest part of the load Bed Load : sand, gravel, larger particles rolling or sliding on the streambed The Work of Streams and Stream Gradation Stream Transportation Stream Load : solid matter carried by a stream.
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Unformatted text preview: A streams capacity increases sharply as its velocity rises. Faster currents can hold more sediment in suspension. The capacity to move bed load also increases with velocity because faster water drags against the bed harder. When water flow increases, a stream that is flowing in sand, silt, and gravel will widen and deepen. When the flow slows, stream will deposit material in the bed, filling the channel. The Work of Streams and Stream Gradation Stream Erosion Three ways that streams erode: Hydraulic Action : stream erosion by impact force of the flowing water upon the bed and banks of the channel Abrasion : erosion of bedrock of a stream channel by impact of particles carried in a stream and by rolling of larger fragments over the stream bed Corrosion : erosion of bedrock of a stream channel by chemical reactions between solutions in stream water and mineral surfaces...
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