Routines, programs, and procedures devised in order to direct computers to perform specific tasks.
- Water resources applications software [More info]
- Archive of USGS water resources software and associated data with documentation available to the public without any fee or cost.
- Water resources applications software: NCALC, Manning's n value calculation program [More info]
- Software for calculating Manning's roughness coefficient values in stream channels with installation instructions for Unix and DOS systems.