What is efficiency measure in? what is it? what does it show?
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How does the wetted perimeter effect the river?
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A larger hydraulic radius means what? (wetted perimeter)
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How does channel roughness effect affect efficiency?
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What is the difference between channel roughness at upper & lower stage and how does this effect discharge & velocity?
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Waterfall formation
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Potholes formation (small circular hollows)
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Meander formation
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... 4.Turbulence increases in & around pools as the water speeds up, so flow begins to twist & coil-> 5. helicoidal flow-> spiral from bank to bank between pools. 6. Helicoidal flow-> more erosion & deepening of pools.
