Rosgen Class G5 Forest Reference Stream Monitoring Data

In his book Applied River Morphology, Dave Rosgen describes G5 Stream types as “an entrenched, moderately steep, step/pool channel deeply incised in sandy materials.” He goes on to say that:

“Channel sinuosities are relatively low, as are width/depth ratios. These “sandy gully” stream types transport great amounts of sediment due to the ease of particle detachment and fluvial entrainment”

“The G5 stream channels are generally in a degradation mode derived from near continuous channel adjustments, due to excessive bank erosion. Bedload transport rates can easily exceed 50% of total load; with active extensive, consistent channel erosion more typical than not. Exceptions my occur where very dense vegetation helps stabilize the toe of the stream bank slopes.”

“The G5 stream type is similar in character to the A5 channels, except G5 channel gradients are less than 4% and tend to be more sinuous with somewhat higher width/depth ratios, due to the gentler channel slopes.”

“These stream types are very sensitive to disturbance and tend to make significant adverse channel adjustments to changes in flow regime and sediment supply from the watershed.”

Resources Describing G5 Stream Geomorphology

Resources Describing G5 Stream Hydraulic Geometry

Resources Describing G5 Stream Turbidity

Last modified: Monday, 10-Mar-2008 19:32:01 UTC