Fluvial Landforms and Processe3

Fluvial Landforms and Processe3 - Fluvial Landforms and...

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Fluvial Landforms and Processes Fluvial landforms on slopes rill o shallow channels eroded by threads of turbulent flow developed in the sheet flow where turbulence and thus entrainment of soil is concentrated o during storms rills erode headward on the steepest local gradient at cm/minute or faster o on open slopes they tend to form parallel to one another, converging in hillside hollows to form dendritic patterns o ephemeral, that is, can be destroyed and recreated during major storms o terminate at the base of slopes and thus are not part of the regional drainage network gully o first-order stream channels that develop on slopes at the upper reaches of watersheds o carry ephemeral stream flow o narrow and steep sided o persist for years or decades, so more persistent than rills but still not "permanent" features o agricultural definition: farm machinery can pass through rills but not gullies Stream Erosion and Sediment Transport streamflow accounts for 85-90% of total sediment transport to the ocean basins
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Fluvial Landforms and Processe3 - Fluvial Landforms and...

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