Stages of a Stream’s Life

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Presentation transcript:

Stages of a Stream’s Life Aim: How do streams change over time?

I. Stages of a Streams Life A stream passes through a series of stages in its lifetime each having certain characteristics. 3 Main Life Cycle Stages Youth Maturity Old Age Oh Man! Look at the curves on that… STREAM

A. Youth Narrow V-shaped Downcutting Fast velocity Steep gradient EROSION IS DOMINANT Example- Colorado River

B. Maturity Meanders develop Floodplains develop Gradient Lowers

C. Old Age Wide meanders Wide floodplains Low velocity Low gradient DYNAMIC EQUILIBRIUM-between erosion and deposition Example- Mississippi River

D. Watershed Geographic area drained by a particular river or stream; drainage basin

E. Tributary A stream that flows into another larger stream.