GEOG 2014 Lecture Notes - Lecture 10: Sediment Transport, Anastomosis, Sinuosity
3 Nov 2016
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Document Summary
Lecture 10 fluvial landforms: basin descriptors and factors. Basic physical determinates: rock , soil, vegetation and land use. Topographic controls: size, length, shape, area, relief. Channel descriptors: channel, stream, basin/valley lengths: sinuosity. Channel width, depth, perimeter and shape: connected to high and low sediment load. Stream network density: erosional dissection: channel forms. Continuum of elevations, climate conditions, flora & fauna: headwaters to channel outlet. Changes in processes & forms upland areas often sediment sources. Change from slope-dominated processes to river- dominated processes, amount & size of material in transport, channel size & shape, discharge. Channel reach: section of channel with similar characteristics (bed, banks, position in landscape) Colluvial reaches: headwater sections, large range of materials, slope processes add most material, coarse bed channels common, limited transport capacity with low flow. Bedrock reaches: in rock, little fine material, steeper slopes, high transport capacity. Alluvial reaches: stream processes dominant, continuum of transport capacities, thus material & channel form.
