Calculating step-by-step breakdown...

Reference Tables

The full FHWA HDS-5 Table A.1 inlet-control coefficients and the Manning's n reference table are available with a free demo or a pioneer account.

Engine Logic Visualizes the engine's decision logic for your current inputs. The governing path is highlighted; equations not on the path are dimmed.
Calculating…
The full engine decision diagram is available in the demo. Try the demo
Governing path for current inputs Available alternative (engine could have picked it) Not possible for this calculation (e.g., M1 when slope is steep) Not yet supported by the engine (e.g., box culverts)
Back to Home