## Culvert Headwater Calculations

## Culvert Headwater Calculations

(OP)

When calculating headwater of a culvert does the size upstream basin within the roadside ditch come into play? As an example, if you have 5cfs of flow into 12" culvert and you calculate that the headwater would be 1ft above the crown of pipe. Would this 1ft calculation differ if you have a 10% ditch slope coming into the culvert vs a 0.5% ditch slope? With the 10% it would seem like the upstream basin would be almost non existent and the inflow to the culvert would inundate this area to a depth greater then the 1ft above crown.

## RE: Culvert Headwater Calculations

## RE: Culvert Headwater Calculations

The other way the headwater can be reduced is to apply the approach velocity or a portion of it.

I hope this helps with you original question.

## RE: Culvert Headwater Calculations

## RE: Culvert Headwater Calculations

Terry Stringer

Better Hydraulics & Hydrology Software

http://www.HydrologyStudio.com

## RE: Culvert Headwater Calculations

Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com

## RE: Culvert Headwater Calculations