Developed by T. Endreny at SUNY ESF in the Department of Environmental Resources Engineering
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# Rosgen Classification Exercise

### Exercise Objective

To apply Rosgen classification of Reaches and determine Reach type based on fluvial geomorphologic characteristics.

### Exercise Process

1. Two statements are presented below, each containing qualitative and quantitative descriptions of the system.
2. For each statement, use the Rosgen classification chart to characterize the Stream Reach.
3. Start with characterizing entrenchment ratio, width to depth ratio, Sinuosity, and slope to determine what letter type.
4. Finish with characterizing the channel material to determine the number type.

A single threaded channel has an Entrenchment Ratio greater than 2.2, has a width to depth ratio less than 12, has Sinuosity greater than 1.5, has slopes less than 0.02, and has a sand channel material. What is its likely Rosgen Classification?

A single threaded channel has an Entrenchment Ratio less than 1.4, has a width to depth ratio greater than 12, has Sinuosity greater than 1.2, has slopes less than 0.02, and has a cobble channel material. What is its likely Rosgen Classification?

Image courtesy of Rosgen

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