Answer :
The interaction between sediment discharge and streamflow determines the size of the stream channel. stream channel slope and sediment particle size.
Channel size and form are influenced by the quantity and size of bed sediment, the makeup of the bank material, the kind of channel vegetation (both riparian and in-stream), and the valley topography (slope and breadth). Where the stream velocity is at its peak, the channel's deepest point may be found. Because of the upstream increase in discharge, both breadth and depth rise. The cross sectional form will alter as discharge rises, making the stream deeper and broader. Water and silt move via a streamflow channel that is created by the stream banks. A stream's channel continually modifies itself in response to variations in streamflow, sediment load, stream slope, and vegetation. Because velocity affects competence and, in turn, the range of particle sizes that may be transported, it depends on both the discharge and the velocity.
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