Geob Lect. 7.2 03/04/2014
Silt and clay always transported on suspension.
Why do streams deposit sediment?
Why does a stream change along its course?
Factors that change the shape of the river
In a river, upstream you have sediment coming in and downstream you have sediment leaving.
In order to have changes in the stream power we have to have changes in shear stress or velocity shear
stress is affected by the water bed or water flow.
Qw, y, s, v – variables that lead to changes in stream power, and erosion in the beds.
Zb x v= k x y x s x v =kys x (water area)/A = k x y x s x Qw/B x y