floods, streams and meanders. gauging station on all major streams measures stream height height vs....
Post on 20-Dec-2015
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FLOODS, STREAMS FLOODS, STREAMS AND MEANDERSAND MEANDERS
GAUGING STATIONGAUGING STATION
• On all major streams
• Measures Stream Height
• Height vs. Discharge (volume)
• Flood Stage and height above
• Flood Rank – ie. 100 year flood
River FloodRiver Flood
MEANDER BELTSMEANDER BELTS
• WINDING SHAPE
• CONSTANTLY SHIFTING CHANNEL
• VELOCITY DIFFERENT IN DIFFERENT PARTS
• CHANNEL CUTOFF
MEANDERMEANDER
Parts of a MeanderParts of a Meander
2 SIDES2 SIDES
• Cut Bank (Erosion)
• Point Bar (Deposition)
CUT BANKCUT BANK
POINT BARSPOINT BARS
SHIFTING CHANNELSSHIFTING CHANNELS
• CHUTE CUT-OFF DURING FLOOD
• NECK CUT-OFF GRADUAL
OXBOW LAKEOXBOW LAKE
• AFTER CUT-OFF
• SEPARATED FROM MAIN RIVER
• NO FLOW
• SEDIMENTATION
Water ColorWater Color
• Muddy water is flowing
• Still water is clear
DAMS ON RIVERSDAMS ON RIVERS
DAM BURSTDAM BURST
DESTRUCTION ON RIVERDESTRUCTION ON RIVER
EROSIONEROSION
HOUSE DAMAGEHOUSE DAMAGE
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