This file documents changes made to swmm44gu by Wayne Huber or others
since its first release on September 28, 1999.
WCH = Wayne Huber
RED = Robert Dickinson
CIM = Chuck Moore
MCH = Mitch Heineman
LR = Lew Rossman
- 10/11/99, C. Moore. Yroute: Correct C. Moore correction at line 118
to make akon = -1.0000001
The next changes, 2-13, were made about 10/15/99 by Chuck Moore:
- Subroutine CATCH around line 90. Change loop from 900 to NW.
- In GETCUR, you put in a check for raising zero to a power around line 443. This check is not needed if you do not turn the Fortran runtime power operations project setting on. This gives error if you raise a zero to a zero or a negative real number to a real power (e.g.: -2.32.0 is not valid but -2.32 is) I think that there is no need to use this switch.
- In GROUND near line 54 you put in checks that are not needed if the
power operations project setting run time error is not used.
- In GUTNR at two locations near line 171 and 179 you put in two checks
that are not need if power operations check is not used.
- I made some minor changes to INDAT1 that you should probably include..
A comment near line 1756, tests for zu less than z at line 1934 and 1963.
Change to format number 5270 and 5271 and added formats 8050 and 8055 to
provide error statement for negative zp.
- INDAT2 near lines 1127 and 1140. I added option for reading pon and
poff for type 4 pumps but have commented them out in my version due to
incompatibility issues with MIKE. These have been tested and I think
that these should be in your version. See documentation in
the EXTRAN44.DOC file.
- In OUTPUT.FOR near line 48. We found that models that had both input
from unformatted sequential and from K_ line produced a NAN in the
continuity summary. NAN stands for Not-a-number. From the online
reference "Not a Number (NaN) results from an operation involving
one or more invalid operands. For instance 0/0 and SQRT ( – 1) result
in NaN. In general, an operation involving a NaN produces another NaN."
The check in OUTPUT is a patch that seems to work. I didn’t have time to
go back an trace where exactly the NAN is occurring in the computations.
Also have a check for case where node has a positive QQI and negative QOU.
This occurs when you are loading a storage junction that is also
overflowing and results in large continuity errors. Again this is a
patch for some other problem somewhere in the bowels of the code. Best
way to prevent this is to not load storage nodes that surcharge to land
- QSHED near line 197 you put in check for power operation that is not
- RDIIRES. I changed format on statements 7010 and 7011 to make things
line up. (28X to 32X). This was needed because I changed width of
subcatchment ID’s in first line of statement.
- RHYDRO1 near line 332. Changed loop from 900 to NG. Yes people are
running models with more than 9000 catchments and conduits!
- STRIP near 72. Added zeros to end of H1 lines in EXTRAN. Used for
optional input of JON and JOFF for pump type 4. (see comments 7 above).
- wrtflow.for. Changed format statement 7000 to prevent wrapping.