CAP - Culvert Analysis Program
CAP GUI - CAP graphical user interface

 Release notes

   Version    Date     Description
 ------------ ---------  -----------------------------------------------------
  CAP GUI 1.0  Jul2013   Initial release of CAP GUI, a graphical interface to
                         the CAP program

  CAP 2.0     10Apr2012  Code revised to support use with the CAP GUI program.
                         Versioning changed from year-mo format to order.

  CAP 97-08c  15Nov1999  Defined variable that was defaulting to unintended 
                         data type and causing divide-by-zero error.

  CAP 97-08b  03Sep1999  Code fixed to ensure 0 returned for one function 
                         when flow equation root doesn't close to specified
                         criteria.  Minor corrections made in display of
                         warning messages.

  CAP 97-08a  07Dec1998  Elliptical culvert sections added.

  CAP 97-08   30Aug1997  Version as documented in USGS Water-Resources 
                         Investigations Report 98-4166.

  CAP 97-01   01May1997  Several additions have been made to the CAP program
                         to reduce the effort required to assemble input data.
                         The major new features are: (1) metric conversion
                         options (a new record implements this feature);
                         (2) default values for C5 and C46 coefficients;
                         (3) new input record for geometry data for inlet
                         details.

                         The following describes problems in the code that
                         have been corrected.  The *CF record variable, HFLW,
                         did not affect computations as was stated in
                         Open-File Report 95-137. Meaningless fall and loss
                         values for computations made by linearly interpolating
                         between high head and low head flows were included in
                         results.  For nonstandard culvert descriptions using
                         the *CS record, if the left-most coordinate pair was
                         not entered first on the *CS record, an erroneous
                         width was printed in the results.  Skew angles entered
                         on the XS record that describes the approach section
                         geometry did not affect the computations.  The CG
                         record variable, ICODE, did not affect pipe arch
                         computations appropriately.  The report also neglected
                         to state that the J portion of the ICODE is required
                         for pipe arches.  The J portion of the ICODE should be
                         entered for pipe arches and indicates the material
                         used and, for corrugated pipe, the corner radius of
                         the pipe when BOTRAD, TOPRAD, and CORRAD are not
                         specified.  Omission of a valid J value will result
                         in the program failing to work. The J codes are as
                         follows:

                         1- concrete pipe, 
                         2,4- corrugated metal pipe, corner radius<= 18"
                         3 - aluminum pipe,
                         5- corrugated metal pipe, corner radius = 31"
                         6- corrugated metal pipe, corner radius = 47"

                         These codes may not be compatible with WSPRO J codes
                         for some cases.
 
  CAP 94-10  31Oct1995   Version as documented in USGS Open-File Report 95-137

  CAP          1993      The CAP program was developed using an antecedent
                         program, A526, as a guide for some of the routines.
                         Several features that were not available in A526
                         were included.  These features are computations for
                         nonstandard culvert sections, default computation of
                         discharge coefficients for flow types 1, 2, and 3,
                         computation between flow transitions, and input file
                         formats that are compatible with WSPRO input formats.