Channel Assessment Procedure Field Guidebook

[Table of Contents]

Appendix 2.

Diagnostic channel keys


Morphology:
Disturbance level:
Code:
Cascade-pool
Moderately aggraded
CPc-w: A2
CPc-w
A2




Relevant field indicators:
S3, S4, C1, C2, C3, C4, D2
Generally:
Step-pool structure is difficult to distinguish.
Channel has been widened by bank erosion.
Pools are short (<one-third channel length) and shallow with little difference in depth between pool and step zones.
Bars (gravel, cobble, and sand) are at same height as bank tops and occur both along margins and in mid-channel.
LWD spans portion of the channel and is oriented parallel to the banks.

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