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Old 05-08-2002, 08:29 PM
William Frost
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Output from Statistics block

I'm trying to use the Statistics block to summarize RUNOFF output from a year's worth of rainfall data. I'm using PC-SWMM, and the output I get groups the events by MIT (which is good) but then only gives me the volume of flow, and not the peak flow, which is what I'm looking for. When I ran the same project in XP-SWMM last year I got a lot more output. Is there a switch in the STAT block I'm missing?

The input file is below.

Thanks,
Bill Frost
KCI Technologies, Inc.

*
$ANUM
$STATISTICS
*
* ISTART TSTART IEND TEND INLOG JCUBE
* ------- ------- ------- ------- ------- -------
A1 20000701 0 20010430 0 0 0
* MIT BASE EBASE LOCRQ LOCRN NPR NPOINT METRIC
LRET
A
* ------- ------- ------- ------- ------- ------- ------- -------
-------
-------
B1 4 0.0 0.0 6000 '' 0 0 0 0
0.4
*
* KSEQ KTERM KTSEQS
* ------- ------- -------
B2 1 0 1
*
* IPOLRQ
* -------
B3 0
*
* ISFLOW1 ISFLOW2ISFLOW3 ISFLOW4 ISFLOW5
* ------- ------- ------- ------- -------
C1 1000 1000 1000 1000 1000
*
*
*
*
$ENDPROGRAM
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  #2 (permalink)  
Old 05-08-2002, 08:30 PM
Heineman, Mitchell
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Re: Output from Statistics block

Bill - I think the problem is that SWMM wasn't expecting you to enter the B3 line. It read the C1 data from your B3 line instead, and ignored what you entered on C1. Since NPR=0 on B1, it didn't look for the B3. Here's my standard STATS file:

$STATISTICS
* ISTART TSTART IEND TEND INLOG JCUBE (1=results in cu.ft.)
A1 0 0 0 0 0 1
* MIT BASE EBASE LOCRQ LOCRN NPR NPOINT METRIC LRET PLOTTINGPOS
B1 6 0.01 0 -1 ' ' /
* KSEQ KTERM KTSEQS
B2 1 0 /
* ISFLOW - generate peak flowrate table
C1 0 0 1000 0 0
$ENDPROGRAM

It was a great improvement when Chuck Moore revised it so you can enter a -1 and analyze all locations at once.

Regards,
Mitch Heineman
CDM
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Old 05-08-2002, 08:31 PM
Dickinson, Robert
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Re: Output from Statistics block

Bill,

I would agree with everything Mitch said, but especially with the usefulness of the '-1' option. This is a feature I did not know about until I came to CDM.

The output of EPA SWMM and XP-SWMM are about the same using STATS. The STATS output is essentially Don Pollman's and Wayne Huber's creation in the middle 1980's and it has not changed much since then except for a few bug corrections.

I would however suggest that a better C1 line for STATS is the following:

* Request for total flow average flow peak flow event duration
interevent duration
C1 1000 1000 1000 1000
1000

Best Regards,
Robert Dickinson
dickinsonre@cdm.com
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