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Modeling bridge with obstruction.

Posted by Shams Al-Amin on June 26, 2012 at 5:00pm

I am modeling a natural channel which has a bridge with two piers in it obstructing the flow. The upstream section  is shown in the image below.

Since I have the coordinates I can add the cross section as a transect in SWMM as I have tried below

I have also added the appropriate conduit code.

1. Will this work?

2. What alternative do I have?

As an alternative I am adding this three sections as three separate links. ( repost from the comment as the images in comment are not clear enough). Please let me know if this is what you suggested.

Kindest regards,

Shams

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Comments

  • Robert Dickinson June 26, 2012 at 6:23pm

    Yes, sorry for the confusion but those new images reposted above are what I was suggesting.

  • Shams Al-Amin June 26, 2012 at 6:09pm

    Thank you Mr. Dickinson. According to your suggestion I have used three separate links ( please see the lower section of the  main post ). Please let me know if this is what you suggested.

  • Robert Dickinson June 26, 2012 at 6:09pm

    Well the images you show below do not look like the bridge section but yes I was suggesting using three links and three transects.

  • Robert Dickinson June 26, 2012 at 5:43pm

    One quick alternative would be to model the three sections as three different links with different transect cross sections.

    The way you are modeling it may not have the proper flow between the center section and the left and right section.  There is also the issue of the wetted perimeter of the one section as the water rises in your network.

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