GEOG 4600 Quiz: GEOG 4600 Quiz 1
6 Apr 2019
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Document Summary
Alluvial channel channels that modify their own morphology (shape and size) over time, through the erosion and deposition of their own sediment. 4 dimensions of fluvial system: vertical axis (depth) Lateral axis (width: time (the change of the other dimensions) Hyporheic zone the transition zone between surface water and groundwater. Stream morphology based on: discharge, volume and type of sediment inputted, nature of the bed"s and banks" materials (i. e. size, strength, composition, gradient and local topography. As you move downstream (or increase stream order): grain size of bed sediment decreases (heavy material deposited first, gradient decreases, channel size (width, depth), velocity, discharge increase, drainage area increases. The smallest permanently flowing stream are called 1st order streams: when two 1st order streams meet they form a 2nd order stream, when two 2nd order streams meet they form a 3rd order stream, etc. Internal friction of a fluid that resists forces tending to cause flow: depends on temperature.
