culvert flow calculator following FWHA method, culvert hydraulics, hydraulic design of highway culverts, Victor Miguel Ponce, Rosa D. Aguilar, San Diego State University

online_culvert: Hydraulic design of highway culverts by FHWA method

Reference

Hydraulic Design of Highway Culverts, HDS 5, Federal Highway Administration,
Third Edition, 2012.

INPUT DATA:

[Description]       [Sample input]       [HW/D Tables]

Units:

[U.S. units] (SI units)

Type of Culvert:

Discharge Q [cfs] (m³/s):

Inlet invert elevation z₁ [ft] (m):

Manning's n:

Bottom slope S_o:

Tailwater depth above outlet invert y₂ [ft] (m):

Culvert length L [ft] (m):

Shoulder elevation E_s [ft] (m):

Freeboard F_b [ft] (m):

Entrance loss coefficient K_e:

Exit loss coefficient K_E:

OUTPUT:

Please enter input data and press 'Calculate'.



Your request was processed at 11:52:18 pm on February 23rd, 2026   [ 260223  23:52:18 ].

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