Transcript Lecture 5

RIVER
MORPHOLOGY
1.
2.
3.
4.
Discharge and Channel Evolution
Alluvial Channel Patterns
Floodplain Development
Terraces
Channel Forming Discharges
Bankfull Discharge
Copyright © Dan Parsons 2002
Alluvial
Channel
Patterns
HOp. 11
Straight Channels
Shibetsu River near the Hokaido area
POOL
RIFFLE
Velocity Reversal Hypothesis
HOp. 12A
Flow Convergence Hypothesis
HOp. 12C
Straight Channels
Shibetsu River near the Hokaido area
Meandering Pattern
Copyright © Norm Catto 2002
RIFFLE
POOL
POOL
RIFFLE
2
3
1
HOp. 12B
2
3
1
HOp. 12B
Meandering Pattern
Copyright © Norm Catto 2002
Braided Pattern
Denali National Park, Alaska, USA © Daryl Dagesse 2002
Braided Pattern
Central Bar Hypothesis
HOp. 13A
Braided
Pattern
Transverse Bar Migration Hypothesis
HOp. 13B
Anastomosed Pattern
Copyright © Martin Geertsema 2002
Floodplain Development
Copyright © Richard Kesel 2002
Lateral
Accretion
Copyright © Simon Robertson 2002
Vertical Accretion
Vertical Accretion
Terrace Formation
northwestern China near Urumchi, © Matthias Jakob 2002
Gower Gulch, Death Valley, CA (© Bernie Bauer 2002)
Cave River terraces, South Island, New Zealand Copyright © Keith Richards 2002