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FLUVIAL PROCESSES & LANDFORMS
GEOGRAPHY 12
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Memory Lane… Think about a memory or two that you have that involves being in or around any type of river or moving water. Post-its?-write it down. Share w/ a classmate. Why are rivers important? Ms. Pasichnyk’s
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4 Types of Transportation in Rivers 4 types
pebble transport by rivers
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DRAINAGE PATTERNS Influenced by shape of land & how the bedrock resists to erosion DENDRITIC: uniform bedrock(like a leaf pattern) TRELLIS, RECTANGULAR & ANNULAR: tributaries go around obstacles; irregular bedrock Refer to page 259 in your text for diagrams!
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River Channel Erosion
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Point bar(depositon) & Under-cut (erosion)
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ALLUVIAL FAN
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ESTUARIES Formed where river joins the ocean Fresh & salt water mix
Home to the world’s most productive ecosystems Develop on deltas (accumulations of sediment)
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Fraser River Estuary
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DELTAS Arcuate Nile River Bird’s Foot Mississippi River
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Youthful Rivers Characteristics: -Mountainous regions -Steep slopes
-Rapids, falls -Large boulders, rocks
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Mature Rivers Characteristics: -Meanders begin to form
-Fewer rapids & falls -Smoother river profile
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Old Rivers Characteristics: -Lateral erosion & deposition prevalent
-Wide floodplains -Large meander curves -Oxbow lakes -No rapids or falls -Levees
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Oxbow Lake Formation
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