Geography 2330A/B Lecture Notes - Lecture 10: Bed Load, Alluvium, Sediment Transport
5 Apr 2016
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Document Summary
Hydraulic and supply control of sediment load. Rivers are responsible for the majority of the water transfer in the cascading system. There are basic characterisics of streams that change downstream. The river channel receives sediment from its own boundary"s, and from external sources. Rivers transport their own sediment, they erode the bed and the banks, and transport that sediment, and deposit it downstream in the channel, valley, or at the downstream end of that system (e. g. delta). The river is essenially shuning the sediment down the channel as ime goes on. The sediment is driven by the low of the river, no low, no sediment transport. To get the stuf moving we need a force acing on the bed of the river: bed shear stress. Density of water x gravity x depth x slope. Slope of the river changes very litle over ime. Transported by rolling along the bed, or being suspended in the water (bed load vs suspended load)
