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West Branch Ompompanosuc

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Record: 5    Segment ID: M01-    Stream Name: West Branch Ompompanoosuc

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NOTE: Enter the Confinement Evaluated first, then the Scores, then the rest.

Rapid Geomorphic Assessment  
  Confinement Evaluated Unconfined  
  Geomorphic Assessment Scores
  Score STD (7.5) Historic (7.5)
7.1 Channel Degradation 16 None No
7.2 Channel Aggradation 6 C to D No
7.3 Widening Channel 3 None No
7.4 Change in Planform 3 None No
  Total Score 28  
  Condition Rating 0.35  
7.5 Channel Evolution Model D  
  Channel Evolution Stage IId  
7.6 Geomorphic Stream Condition Fair  
7.7 Stream Sensitivity Extreme  
7.5 Channel Adjustment Processes Narrative  
  A channel avulsion is evident on both the orthophoto and in the field. The channel has undergone extreme widening as a result of aggradation on bends. This has been exaggerated by straight channel upstream that is acting as a sediment transport segment. Planform adjustment is extreme with islands, active flood chutes, lateral bank erosion, as well as an avulsion. There is braiding under low flow conditions.