Explanation of River Roughness Exercise
To assess earlier estimate of river behavior based on river roughness, measured in dimension.
- Examine the image showing the two hydrographs, and determine whether you had selected the correct river form for each color.
- Low roughness rivers will allow a flood wave or other runoff hydrograph to travel through the river more rapidly, creating a higher magnitude event with shorter duration, as shown in the blue hydrograph.
- Hi roughness rivers will cause a flood wave or other runoff hydrograph to travel through the watershed more slowly, creating a lower magnitude event with longer duration, as shown in the red hydrograph.