Channel Assessment Procedure Field Guidebook

[Table of Contents]

Appendix 2.

Diagnostic channel keys


Morphology:
Disturbance level:
Code:
Cascade-pool
Stable
CPb: S
CPb
S



Generally:
Stone lines largely intact, forming steps. Water flows over steps and around individual boulders.
Stone lines cross the channel in a diagonal pattern, often forming diamond or "net" shapes.
Pools between steps often make up over two-thirds of the channel (steps <one-third).
LWD plays an insignificant role in controlling channel pattern (LWD is present but not important functionally; it does not significantly influence sediment storage or scour).

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