Streams and Rivers Video: Grand Canyon.

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Presentation transcript:

Streams and Rivers Video: Grand Canyon

Streams (all notes) Any flowing water. The main agent of erosion on Earth.

Discharge The amount of water in a stream. More discharge = EROSION.

Stages of Stream Formation Youthful Mature Old Age

Youthful High elevations V-shaped valley Rapids and waterfalls present No floodplain Capable of moving very large sediment (i.e. boulders)

Youthful

Mature A few “S”-shaped curves = Meanders Floodplains Not capable of moving large sediment

Mature

Old Age Many meanders Very large floodplain Oxbow lakes Can only carry smallest sediment: silts and clays

Old Age

Old Age

Oxbow Lake

Oxbow Lake

Stream Load –Sediment carried in a stream Rolling and Bouncing of large sediment Saltation of sand sized particles Suspension of silt and clay Dissolved salts Animation

Terms to Know Alluvial fan Base level Bed load Channel Delta Dissolved load Tributaries Erosion Floodplain Groundwater Levee (natural) Meander Oxbow lake Rapids River Stream Suspended load Waterfall