WSP12125

• File Number: 8102
• Description: Arkansas River Hydrology
• State: CO
• Basin: Arkansas
• Water Division: 2
• Date: 1/1/1997
• Author: USGS
• Title: Description of the Program Changes - 1989-97- and a User Manual for a Transit-Loss Accounting Program Applied to Fountain Creek Between Colorado Springs and the Arkansas River-Colorado
• Water Supply Pro - Doc Type: Report/Study

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(I) adding TRF's at locations other than the CCS
WWTF, (2) subtracting TRF's for diversion,
(3) repeating the computations until the assumed and
computed downstream TRF'S have converged (see the
"Changes to Program Output" section, p. 22), and
(4) perfonni ng the upstream calculation to determine
the TRF purchase quantity for any specified TRF
diversion (see the "Changes to Account for Diversion
of Transmountain Return Flows" section, p. 15-16).
These exceptions have been briefly explained in the
preceding sections of this report. In the current (1997)
version of the accounting program, transit-loss
computations are made first for the FAP TRF's, then
computations are made for the CCS TRF's, and lastly
the comparison computation is made (see the
"Changes to Program Output" section, p. 16).
The transit-loss computation steps for the FAP
TRF's and the CCS TRF's, which are made indepen-
dently for each entity, basically consist of:
(I) Completing the stream-segment computations
(fig. 4) for each stream segment, but including any
appropriate additional TRF sources and any TRF
diversions; (2) completing ,the subreach computations
(fig. 5) for each subreach (fig. 6, table 4) within the
stream segment, again inCluding any appropriate TRF
sources and any TRF diversions; (3) repeating each set
of stream-segment and subreach computations until
the assumed downstream TRF has converged with the
computed downstream TRF; (4) after convergence,
perfonning the upstream calculation for each specified
TRF diversion in each subreach to compute the TRF
purchase quantity required for e.ach TRF diversion;
and (5) updating the TRF diversion USED accounts
data with the computed TRF purchase quantities.
When the transit-loss computations are
completed for the FAP TRF's, the program writes the
resulting bank-storage and channel-storage loss and
gain results to the faJecov.fil file; when transit-loss
computations are completed for the CCS TRF's, the
program writes the resulting bank-storage and
channel-storage loss and gain results to the cSJecov.fil
file. Following the transit-loss computations for the
FAP and the CCS TRF's, the program writes (I) all the
updated TRF diversion USED accounts data to the
accl.fil file, (2) all appropriate data to the secwcd.out.
subrcJJ.Oul, and Ilcalc.oul files, and (3) the appropriate
results to the daily output file (1Iyyyymmdd) (table 5).
The program then (I) makes the transit-loss computa-
tions for the comparison calculation, (2) writes the
resulting bank-storage and channel-storage loss and

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gain results to the cmpJecov.fil file, and (3) writes the
results for the comparison calculation to the last page
of the daily output file (table 5). [See the "Contents of
the Nexttrloss Directory" section (p. 27-29) for file
descriptions.l When all output has been written, the
program closes all the input and output files and
returns to the program options.

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MAINTENANCE OF THE TRANSIT-LOSS
ACCOUNTING PROGRAM

Maintenance of the current (1997) version of the
accounting program is fairly simple. Proper mainte-
nance of the program requires some knowledge of
where the program files are located and what files are
included in the program. In addition, some knowledge
is needed about the procedures used to maintain and
archive the current output files, where historic output
files are archived, and where previous versions of the
accounting program are arcbived. The USGS office in
Pueblo maintains the accounting program and the
associated auxiliary programs, archives the current
output files, creates and maintains the historic output
archives, and maintains the previous program
archi ves.

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Procedures to Archive Current Output
Files

In the past, the daily output files were archived
manually, which consisted of moving these files from
the nexttrloss directory to directories for each month
(fig. 7). Usually, the files were not moved on any
regular schedule, and dozens to hundreds of files
would accumulate in the nexttrloss directory.
However, 2 or 3 months after the, end of a water year,
the daily output files were moved to the monthly direc-
tories, and the monthly directories then were archived
to a reel-type magnetic tape. The contents of the other
output files associated with the water year that just
ended also were archived with the monthly directories
containing the daily output files.
During preparation of this report, the manual
archiving procedure was partly automated. This auto-
mation consisted of developing a computer script
program that would ( I ) create the 12 monthly directo-
ries in the nexttrloss directory (fig. 7) at the beginning
of the water year (mid-October) and (2) on the 15th
day of each month, move the daily output files for the

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MAtNlCNANCE OF THE TRANSIT-LOSS ACCOUNTING PROGRAM 35