HY8:Increased Resistance in Box Culverts
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The input variables required for this calculation is the following:
- H/RI -- Ratio of roughness element height divided by hydraulic radius taken about the top of the roughness element.
- Height of the roughened section (h)
The following figure shows the flow regimes and variables for an increased resistance energy dissipator implemented in a circular culvert.
Variables from the figure
- L -- Length from beginning of one roughness element to the beginning of the next roughness element.
- h -- height of roughness element
- Di -- diameter of roughened section (opening)