agents of change
streams vs. rivers
related to tectonics
STREAM TRANSPORT (Chapter 18) - Lecture Outline
Last updated: 04/17/07
Basic considerations
|
agents of change |
|
streams vs. rivers |
|
related to tectonics |
1. Rivers and streams - generalizations
|
Streams |
|
rivers |
|
channel |
|
load |
|
discharge |
2. How streams flow
|
laminar flow |
|
turbulent flow |
|
factors |
3. Stream load
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solid
| ||||||||||
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dissolved |
4. Settling from suspension
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settling velocity |
|
saltation |
5. Bedforms
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Ripples |
|
Dunes |
6. Erosion by running water
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movement of unconsolidated material |
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undercutting |
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erosion of gullies and valleys |
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sanblasting |
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potholes |
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chemical weathering |
|
physical weathering |
7. Stream valleys, channels and floodplains
|
stream valley |
|
channel |
|
floodplains |
|
tectonic activity |
8. Channel patterns
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straight channels | ||||||||
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meandering channels
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braided channels | ||||||||
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floodplains |
9. Floods
|
discharge vs. capacity |
|
prediction |
|
1927 Mississippi River flood |
|
catastrophic floods |
10. Stream gradients
|
longitudinal gradient |
|
base level |
|
alluvial fans |
11. Drainage networks
|
divide |
|
stream piracy |
|
drainage basin |
12. Deltas
|
migration |
|
shifts in Mississippi River |
|
Atchafalaya stream capture |
