GeoPak Drainage

My customer is having some difficulities with Geo Drainage and the results given after attempting to enter a user defined rainfall amount.  She is using the following:  Microstation version 8 08.05.02.35 and Geopack version 08.05.02.45

The details to the issue are:

"I am trying to add a user-defined intensity equation in the Rainfall tab of the Drainage Library, but for some reason Geopak won't accept the "c" coefficient. I am trying to add:

10-yr, 88.1, 18.4, 0.756

100-yr,120.3, 21.3, 0.741

 

Since I could not add the equation, I tried adding an Intensity Table and named it Lake Jackson (the only way I was able to accomplish was to create and import a txt file). I've checked the #s and it seems ok, however, when I try to compute the discharge from the node it calculates it incorrectly.

 

My typical section is one lane each way with a median. There's 60-deg parking on each side of the road and also along the median. I plan to have grate inlets between the parking stalls and the driving lane. I've entered a spread section for that.

I have some associated files from the client if the above does not offer enough details. 

Stephen Loveless

  • Stephen_LBS:

    for some reason Geopak won't accept the "c" coefficient.

     Just venturing a guess here Stephen...  The Intensity Equation dialog works on the standard geopak interface, i.e. it uses the add/modify/delete buttons off to the right, to input variables from the list entry beneath it.  Each variable has to be entered into the key-in fields.  Since your user is having troubles getting the last entry to store, its possibly she didn't accept the last variable by either hitting the Enter button or the Tab button on the keyboard.  If you don't Enter or Tab the value, it'll show up as 0.00 making it appear as its stuck; I just tried and verified this behavior.  Maybe she's having this issue?  Give it a shot?

  • I was not able to add a "c" value greater than 0.8.  Did you ever get this resolved?
  • I would suggest that a call to support would be the most efficient way to get an answer.  This is a rather complex problem with lots of different variables, any one of which might be the culprit.

    Robert Garrett
    Senior Product Engineer
    Bentley Systems Inc.