U.S. Geological Survey
Water Resources Applications Software

NCALC

Manning's n value calculation program

Information

UNIX or DOS installation instructions (README file)

Cost and ordering of U.S. Geological Survey printed documentation.

Software

Selection of the following options preceded by a binary icon retrieves a compressed UNIX tar file or a self-extracting DOS executable. A README file containing installation instructions is included with each of the software distribution files. There are separate README files for the UNIX and DOS distributions.

The Free Software Foundation's gunzip is necessary to uncompress the UNIX tar files available below. However, some World Wide Web browsers automatically uncompress retrieved files. Thus, running gunzip as stated in the installation instructions may be unnecessary.

NCALC compiled for...

 Sun SPARCstation (Solaris) (34K)

 IBM-compatible PC, 386 or higher with math coprocessor (183K)

 IBM-compatible PC, 386 or higher with math coprocessor (includes source) (196K)

NCALC source code for compilation under...

 UNIX (27K)

 DOS (45K)

The above software can also be accessed via anonymous FTP from water.usgs.gov in the /pub/software/surface_water/ncalc directory.

Documentation

Jarrett, R.D., and Petsch, H.E., Jr., 1985, Computer program NCALC user's manual--verification of Manning's roughness coefficient in channels: U.S. Geological Survey Water-Resources Investigations Report 85-4317, 27 p.
Point of contact for NCALC:

U.S. Geological Survey
Hydrologic Analysis Software Support Program
437 National Center
Reston, VA 20192
(electronic mail: h2osoft@usgs.gov)