FLOODS, STREAMS AND MEANDERS. GAUGING STATION On all major streams Measures Stream Height Height vs. Discharge (volume) Flood Stage and height above Flood.

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Presentation transcript:

FLOODS, STREAMS AND MEANDERS

GAUGING STATION On all major streams Measures Stream Height Height vs. Discharge (volume) Flood Stage and height above Flood Rank – ie. 100 year flood

River Flood

MEANDER BELTS WINDING SHAPE CONSTANTLY SHIFTING CHANNEL VELOCITY DIFFERENT IN DIFFERENT PARTS CHANNEL CUTOFF

MEANDER

Parts of a Meander

2 SIDES Cut Bank (Erosion) Point Bar (Deposition)

CUT BANK

POINT BARS

SHIFTING CHANNELS CHUTE CUT-OFF DURING FLOOD NECK CUT-OFF GRADUAL

OXBOW LAKE AFTER CUT-OFF SEPARATED FROM MAIN RIVER NO FLOW SEDIMENTATION

Water Color Muddy water is flowing Still water is clear

DAMS ON RIVERS

DAM BURST

DESTRUCTION ON RIVER

EROSION

HOUSE DAMAGE