The following is one of over 75 programs & documentation included with Hydro-CD by Dodson

Nomograph Calculator for FHWA HDS 5 (Beta Ver. 1.5B)

Hydraulic Design Series Number 5
Publication No. FHWA-NHI-01-020
September 2001 (Revised May 2005)
367 Pages

Distributor: U.S. Department of Transportation Federal Highway Administration

HDS 5 Appendix D Chart Calculator
The program HDS5eq.exe provides an interface for electronically calculating the charts found in Appendix D of HDS-5, "Hydraulic Design of Highway Culverts." The calculator uses the inlet control equations found in Appendix A. The coefficients used by the program can be viewed in the file Coef1.dat. The calculator may provide a slightly different headwater than HY 8 for similar input values since HY 8 uses polynomial equations for headwater depths from 0.5D to 3D to transition inlet control between weir and orifice conditions
2012 - Walter P. Moore & Associates, Inc. - Houston, TX, USA