Channel Assessment Procedure Field Guidebook

[Table of Contents]

Appendix 2.

Diagnostic channel keys


Morphology:
Disturbance level:
Code:
Cascade-pool
Moderately degraded
CPc-w: D2
CPc-w
D2




Relevant field indicators:
S5, C1, C2, C5, D2
Generally:
Cobble steps remain evident but they are usually not continuous across the channel.
Pools are shallow due to down-cutting of steps.
Channel is coarse-textured overall (only minor amounts of gravel or finer sediments).
Bars are not extensive, existing only along channel margins; commonly bar surfaces are vegetated (e.g., moss, alder).

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