SMPDBK Cross Sections Error

[mbelanger]

Hello,

I come across an error while trying to read the SMPDBK simulation into WMS (v.10.0). I've run SMPDBK through dosbox to the point of completion (prompt "Stop - Program terminated.") and the output file says that it completed the analysis. However, when I attempt to read the solution the following message prompt pops up "No file cross sections exist. The output file cannot be read." I have all of the xsection and input/output files in the same directory so I'm not entirely sure why I am getting this error? Any suggestions? I've attached the output file if needed. 

SMPDBK.OUT

[Chris Smemoe]

WMS is looking for something like the following lines in your .out file:

  RVR MILE  MAX FLOW  MAX ELEV  MAX DEPTH TIME(HR)  TIME(HR)  TIME(HR)   FLOOD
  FROM DAM    (CFS)   (FT-MSL)    (FT)   MAX DEPTH   FLOOD    DEFLOOD  DEPTH(FT)
  ********  ********  ********  ********  ********  ********  ********  ********
       .00  1214514.   5331.49     97.20      2.00       .00       .00     10.00
      1.02   989023.   5331.49    109.32      2.07       .00       .00     10.00
      2.57   952856.   5331.49    116.03      2.18       .00       .00     10.00
      4.48   943327.   5299.28    125.07      2.23       .00       .00     10.00
      8.83   933894.   4927.86     68.22      2.37       .37      5.44     10.00
     10.35   924555.   4805.21     25.51      2.97      1.18      5.76     10.00
     11.55   915310.   4736.06     20.70      3.00      1.25      5.76     10.00
     12.24   906157.   4709.49     20.14      3.03      1.43      5.59     10.00

Your .out file has the following lines with a warning:

  RVR MILE  MAX FLOW  MAX ELEV  MAX DEPTH TIME(HR)  TIME(HR)  TIME(HR)   FLOOD
  FROM DAM    (CFS)   (FT-MSL)    (FT)   MAX DEPTH   FLOOD    DEFLOOD  DEPTH(FT)
  ********  ********  ********  ********  ********  ********  ********  ********

 CANNOT CONVERGE ON A TAILWATER DEPTH WHICH IS LESS THAN THE HEADWATER DEPTH EVEN WITH 90% SUBMERGENCE
 (Q=    1465.1 HW=  2.08 Y=  1.60 )   SUGGEST YOU INCREASE SLOPE OR MODIFIY CROSS SECTION
       .00     1440.   5479.86      2.06      2.00       .00       .00     10.00
     16.91       78.   5173.31      2.68     69.72       .00       .00     10.00

You should be able to remove the 3 lines between the headers and the start of the first number in your .out file so you have the following text and it should read into WMS fine:

  RVR MILE  MAX FLOW  MAX ELEV  MAX DEPTH TIME(HR)  TIME(HR)  TIME(HR)   FLOOD
  FROM DAM    (CFS)   (FT-MSL)    (FT)   MAX DEPTH   FLOOD    DEFLOOD  DEPTH(FT)
  ********  ********  ********  ********  ********  ********  ********  ********
       .00     1440.   5479.86      2.06      2.00       .00       .00     10.00
     16.91       78.   5173.31      2.68     69.72       .00       .00     10.00

I'd also recommend adding additional cross sections to your model so you have more computed flood depth values along your centerline.  Adding additional cross sections might fix the warning in your .out file.

Let me know if I can help with anything else.

Chris

[mbelanger]

Thank you for the prompt response. Removing those lines did indeed clear up the immediate issue but adding additional sections muddled the results significantly. It now looks like a series of small detached pools through my channel instead of a flood wave. Not sure the cause but I'll continue refinement of the model on my end. Thanks again for the help.

[mbelanger]

I'm stuck on my model. I've not too familiar with SMPDBK's analysis methods to understand how this is happening but it is.

The two cross sections model output gives reasonably accurate information as would be expected from a dam break (minus the area directly below the reservoir itself) but when I add ten more cross sections I would expect a more well defined channel in the results. (Images attached below)

To me, it doesn't look like WMS is interpolating between the cross sections quite right, and instead of a flood wave, I seem to have a pool of water with gaps in between the cross sections. Does anyone have any ideas on how to resolve this? Would it be worth going back and rebuilding the model from scratch?

Aquaveo Printout12.pdf

Aquaveo Printout2.pdf

[Chris Smemoe]

I just noticed your response.  There are a couple of things you can do to get a better result.  One is to increase the number of cross sections in your model so you have more data points and get better interpolation when you do the floodplain delineation.  The other thing you should always do is to add additional solution points by interpolating between the existing solution points along the river of interest and add additional solution points along each of the cross sections in your model.