2 - 4/2/2008 11:26:00 AM Running surface water Formation of...

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02/04/2008 10:26:00 Running surface water     Formation of streams and drainage networks     Runoff – surface water moving downslope Initial  sheetwash follows topographic lows, or cuts down through weaknesses  in the substrate to form streams Streams extend upslope by  headward erosion Smaller streans ( tributaries) flow into larger stream ( trunk stream)  All interconnecting streams make up a  drainage network o The spatial pattern of drainage network depends on  1. composition of substrate  2. shape of landscape o drainage network collects water from a region (=  watershed) o ridge or highland that separates watersheds =  drainage divide o continental divide separates  drainage basins that flow into different  oceans o streams merge into rivers, which eventually flow into an ocean o nature of river changes as you move downstream (down its  longitudinal profile)
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This note was uploaded on 04/07/2008 for the course GSC 106 taught by Professor Dr.hood during the Spring '08 term at University of Miami.

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2 - 4/2/2008 11:26:00 AM Running surface water Formation of...

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