Hydraulic Calculators

Channel Hydraulics

Channel hydraulics must be performed before Culvert hydraulics, because the channel flow height is an input into the culvert hydraulics analysis. An approximate channel cross-section is usually sufficient to analyze the flow. Enter the channel cross section, slope, and flow data and the flow height and normal channel velocity will be calculated.

Culvert Hydraulics

To determine the required culvert size, use this calculator. The required criteria varies by jurisdiction but normally the primary variables are the headwater elevation (for flooding, backwater purposes) and flow velocity (for erosion purposes). This analysis engine uses the HDS-5 methodology, developed by the U.S. Federal Highway Administration (FHWA).