UCCS GES 101 - The Fluvial Processes (10 pages)

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The Fluvial Processes



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The Fluvial Processes

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Pages:
10
School:
University of Colorado Colorado Springs
Course:
Ges 101 - Environmental Systems: Landforms and Soils
Environmental Systems: Landforms and Soils Documents

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Chapter 16 The Fluvial Processes I II III The Impact of Fluvial Processes on the Environment A external land shaping agents that work by erosion and deposition 1 running water a most important external agent b contributes more to shaping landforms than all other external agents combined c occurs everywhere except Antarctica 2 wind 3 coastal waters 4 subsurface waters 5 moving ice B fluvial processes processes that involve running water 1 overland flow unchanneled downslope movement of surface water 2 streamflow channeled movement of water along a valley bottom C landscape sculpting effects of fluvial processes 1 smooth irregularities a wear down hills by erosion b fill up valleys by deposition 2 often create deep canyons and steep slopes as preliminary stage Some Fundamental Concepts A Valleys and Interfluves 1 all continental surfaces consist of these 2 topographic elements 2 valley that portion of the terrain in which a drainage system is clearly established a includes valley bottom and valley sides 3 interfluve higher land above the valley sides that separate adjacent valleys a ridgetops mountain crest or broad flattish divides between drainage systems B Drainage Basins 1 drainage basin watershed all the area that contributes overland flow and groundwater to a particular stream 2 drainage divide line of separation between runoff that descends in the direction of one drainage basin and runoff that flows toward an adjacent basin 3 the drainage basin of a principal river encompasses the smaller drainage basins of all its tributaries Stream Systems A Stream Orders 1 stream order concept that describes the hierarchy of a drainage net a small streams come together to form successively larger ones b first order stream a stream without tributaries c second order stream formed from confluence of 2 first order streams Chapter 16 The Fluvial Processes p 1 of 10 d third order stream formed from confluence of 2 second order streams e joining of a lower order stream with a



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