HydroCAD Reference Manual

The HydroCAD Reference Manual provides complete details on the calculations performed by the HydroCAD Stormwater Modeling System, plus extensive hydrology and hydraulics reference material. This publication replaces the previous "HydroCAD Owner's Manual". It has been updated in 2020 for the latest HydroCAD 10.1 software release. It is intended as a general hydrology and hydraulics reference, with less content devoted to the specifics of software operation. A must-have reference for all HydroCAD users, and an excellent Hydrology and Hydraulics text in general. TECHNICAL REFERENCE units of measure, rainfall data, IDF library, use of NOAA/NRCC data, rainfall library, synthetic mass curves, unit hydrographs, curve numbers, Time of Concentration, SCS/NRCS runoff methodology, Santa Barbara Urban Hydrograph Method, Rational Method, reach routing, pond storage calculations, hydraulics calculations, pond routing calculations, water quality & detention time, link calculations, additional hydrograph calculations, land use analysis and pollutant loading, calculation messages, and frequently asked questions. OPERATING SECTION Software features, installation, and basic operation, including starting and configuring HydroCAD, working with project files, working with the routing Diagram, printing Reports, working with nodes, entering data, hydrograph calculations, evaluating results, and data import. APPENDIX Hydrologic soil groups, runoff curve numbers, CN adjustment for AMC/ARC, rainfall library, SCS synthetic rainfall distributions, Manning's number tables, broad-crested weir coefficients, culvert entrance Loss coefficients, sheet flow roughness coefficients, and velocity factors.