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Comments

  • David Jones April 27, 2011 at 11:45am
    Thanks Bob! it works now
  • Robert Dickinson April 26, 2011 at 5:14pm

    What is saved to the runoff file is n values 

     

    int n = MAX_SUBCATCH_RESULTS + Nobjects[POLLUT] - 1;

     

    where MAX_SUBCATCH_RESULTS is 7 or if you have no pollutants really 6.

  • David Jones April 26, 2011 at 4:19pm

    Thanks! I had had great luck using the binary results file using the description in the SWMM5 Interfacing guide and was hoping there was a document like that with a description of the runoff interface file. I was thinking I would try reading one first to confirm I knew the format then I could write one. Following the code in runoff.c and subcatch.c it looks straightforward. The following (in C#) works fine to get the initial information:

     

            FileStream fs1 = new FileStream(infile, FileMode.Open);

            BinaryReader br = new BinaryReader(fs1);

        char[] SomeCharsChars = null;

        SomeCharsChars = br.ReadChars(12);// "SWMM5-RUNOFF"

        long lngNumCatchments = br.ReadInt32();

        long lngNumPollutants = br.ReadInt32();

        long lngFlowUnits = br.ReadInt32();

        long lngMaxSteps = br.ReadInt32();

     

    The next thing I am expecting to see are the results according to the following from runoff_saveToFile

     

    fwrite(&tStep, sizeof(float), 1, Frunoff.file);

        for (j=0; j<Nobjects[SUBCATCH]; j++)

        {

            subcatch_getResults(j, 1.0, SubcatchResults);

            fwrite(SubcatchResults, sizeof(float), n, Frunoff.file);

        }

     

    Together with tracing down in subcatch_getResults the following:

    x[SUBCATCH_RAINFALL]

    x[SUBCATCH_SNOWDEPTH]

    x[SUBCATCH_LOSSES]

    x[SUBCATCH_RUNOFF]

    x[SUBCATCH_GW_FLOW]   

    x[SUBCATCH_GW_ELEV]

    x[SUBCATCH_WASHOFF+p]

     

    I was expecting to see time step (a float) then 6 floats plus one for each pollutant.

    I try reading that with:

     

    float[,] fltValue = new float[6 + lngNumPollutants, lngMaxSteps];

    float[] dbltimestep = new float[lngMaxSteps];

            //number of variables = 6 + numpollutnat

        for (int i = 0; i < lngMaxSteps; i += 1)

        {

            dbltimestep[i] = br.ReadSingle();

            for (int j = 0; i < 6 + lngNumPollutants; i += 1)

                fltValue[i, j] = br.ReadSingle();

        {

     

     

    But it doesn’t work? In my test file I only have one subcatchemnt, will need to modify the above once I figure this out. My first time step (  dbltimestep[1]) doesn't make any sence. If I don't solve this it's not that big of a deal we have a work around.

     

    Thanks,

     

    David

  • Robert Dickinson April 25, 2011 at 6:54pm
    Hi David, the easiest way to do that is make a file and look at the format.  I will make an example for you.
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