FLUVIAL PROCESSES & LANDFORMS

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Presentation transcript:

FLUVIAL PROCESSES & LANDFORMS GEOGRAPHY 12

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

4 Types of Transportation in Rivers 4 types pebble transport by rivers

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!

River Channel Erosion

Point bar(depositon) & Under-cut (erosion)

ALLUVIAL FAN

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)

Fraser River Estuary

DELTAS Arcuate Nile River Bird’s Foot Mississippi River

Youthful Rivers Characteristics: -Mountainous regions -Steep slopes -Rapids, falls -Large boulders, rocks

Mature Rivers Characteristics: -Meanders begin to form -Fewer rapids & falls -Smoother river profile

Old Rivers Characteristics: -Lateral erosion & deposition prevalent -Wide floodplains -Large meander curves -Oxbow lakes -No rapids or falls -Levees

Oxbow Lake Formation

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