STREAMS - Streams: Transport to the Ocean Ocean Gary D....

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Streams: Streams: Transport to the Transport to the Ocean Ocean Gary D. McMichael/Photo Researecher
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The Hydrologic Cycle Describes water’s movement on the surface P = RO + ET + I Driven by solar heat ocean water evaporates wind carries moist air over land topography can force moist air to higher altitudes as air rises, it cools, water condenses to form clouds and then precipitate as rain or snow ( P ) rain that falls on the land can: evaporate back into the atmosphere ( E ) be taken up by plants, which return water to the atmosphere – called transpiration ( T ) flow over the ground, enter streams and rivers, and ultimately be returned to the sea; called runoff ( RO ) infiltrates and becomes groundwater ( I )
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The Hydrologic Cycle
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STREAMS This is the “RO” of P = RO + I + ET
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Streams Streams Stream Stream : body of water flowing in a channel The floor of the channel is called the bed bed . The sides of the are called the banks banks . . Flood Flood : when bodies of water overflow their banks and water covers the adjacent land called the floodplain floodplain .
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A stream system network.
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Drainage basin Drainage basin Area of land surrounded by topographic divides in which all the water is directed to a single point In Hawaii, divides are steep & basins are small!
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Mississippi River Drainage Basin
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Drainage Basin of the Colorado River
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Some terminology VELOCITY ( V ) - DISTANCE PER UNIT TIME (cm/s, mph) DISCHAGRE ( Q ) Total amount of water that passes a given point in a stream per unit time (m 3 /s) = width (m) × depth (m) × average velocity (m/s) In the U.S., this is expressed as cubic feet per second (cfs): 1 m 3 /s = 35.9 ft 3 /s
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River at Low Discharge
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River at High Discharge
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Downstream changes
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Longitudinal Stream Profile of the Platt and South Platt Rivers
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STREAMS - Streams: Transport to the Ocean Ocean Gary D....

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