Flow Pro 2.0   
by ProSoft Apps

Flow Pro provides civil engineers and hydrologists with a powerful tool for designing or analyzing open-channel waterways (e.g., culverts, irrigation channels, sluiceways, and flumes). Using the industry-standard Manning's equation and numerical integration, Flow Pro computes water-surface profiles, subcritical or supercritical flow regimes, and channel depths. Good user's notes are included as online help.
Graphical and easy to use
Enhanced Plotting Features
Report Ready Results
Supports both English and SI (metric) units
Handles circular, trapezoidal, ushaped, and tubular channel shapes