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  1. galaxy2014

    how to manually type in discharge-elevation curve as tailwater condition for pond

    Hello, I create a pond in HydroCAD, its principle spillway is weir. I have a discharge-elevation curve for this weir as shown below. Now I want to manually type it into the HydroCAD, so the water will flow out according to the discharge-elevation curve. does anyone know how to do it?
  2. galaxy2014

    The inflow and outflow of my reach is highly different for some reason.

    Hello, Please see my HydroCAD model in the attachment. When I run it, the inflow and the outflow of one reach named "Reach 17A" is highly different. It seems like the reach decreases the inflow a lot after flow pass it. Do you know what happened with my model? Best, Thank...
  3. galaxy2014

    How to simulate one culvert insert into another culvert in HydroCAD?

    Sorry, just type last sentence wrong. Do you know how to solve the following 3 problems? please see the HydroCAD model in the attachment with updated node number. [90] Warning: Pond 1P Qout>Qin may require smaller dt or Finer Routing [80] Warning: Pond 2P Exceeded Pond 3P by 0.03'@12.45...
  4. galaxy2014

    How to simulate one culvert insert into another culvert in HydroCAD?

    Hello Peter, Thank you for the suggestion, I already change the node number to be simple. I attached the updated HydroCAD. So in my case, how to deal with the warning 90? I changed the finer routing to 1, then warning 80 shows up. And I also use a shorter time span (0-30 hours), then warning...
  5. galaxy2014

    How to simulate one culvert insert into another culvert in HydroCAD?

    Hello Peter, The attachment is my HydroCAD file, I used "Dyn-Stor-Ind" method, dt is 0.01 and Finer Routing = 3. When you run it, there is warning for Pond Ex 72" RCP-35'. Could you help me debug this? Thank...
  6. galaxy2014

    How to simulate one culvert insert into another culvert in HydroCAD?

    Hello Peter, Thank you so much. I use zero-storage and it works now. But in our case, actually it is a pond with storage instead of a zero-storage culvert. Just for the curiosity, do you know why the peak outflow is larger than the peak inflow of one culvert just because we add some storage...
  7. galaxy2014

    How to simulate one culvert insert into another culvert in HydroCAD?

    Hello, Yes, I did click the warning, and the following screen shot shows up. I used smaller dt and increased the Finer Routing (my current dt is 0.01 and my Finer Routing = 3), the warning still existed, my peak outflow is larger than peak inflow, do you know why? Do you have some method to...
  8. galaxy2014

    How to simulate one culvert insert into another culvert in HydroCAD?

    Hello, please see the screen shot below for my model. A 36" RCP insert into a 72" RCP, so I break up the 72" RCP into two pipes: a shorter 72" RCP and a 36" RCP insert into a longer 72"RCP. I use "Dyn-Stor-Ind" method to run the model, and the following warning shows up, I clicked it and it...
  9. galaxy2014

    How to simulate one culvert insert into another culvert in HydroCAD?

    Hello, I just create the model as the following screen shot and run it, but I get the warnnings: warning: Pond Ex 72" RCP-length 80' Submerged Pond Ex 36" RCP-length 150' Primary device # 1 INLET by 1.47' warning: Pond Ex 72" RCP-length 80' Exceeded Pond Ex 72" RCP-length 20' by 0.46' @ 12.34...
  10. galaxy2014

    How to simulate two pipe connecting with each other in HydroCAD?

    Hello, Thank you for your suggestion, I just create the model like what you said, but I receive the warning: Pond Ex 54" ACCMSPP Submerged Pond Ex 36" CMP Primary device #1 INLET by 3.66', so how to deal with this case? thank you
  11. galaxy2014

    How to simulate one culvert insert into another culvert in HydroCAD?

    Thank you for that. So for the Ke of 72" RCP (length-80'), what Ke should I use for entrance? For 72" RCP (length-20') to 72" RCP (length-80'), Ke should be 0 theoretically, and for 36" RCP (length-20') to 72" RCP (length-80'), what entrance case it fit for this? "groove end w/headwall"...
  12. galaxy2014

    How to simulate one culvert insert into another culvert in HydroCAD?

    Hello, Please see the following 1st screen shot, I mark the dimension for the culverts, so you mean even if the length of 72" RCP is 100', I separate it into two culverts, one is 80' long and another is 20' long, then I create a catch-basin with a 72" culvert outlet (length-80'), a catch-basin...
  13. galaxy2014

    How to simulate two pipe connecting with each other in HydroCAD?

    Hello, Thank you for your reply, I still do not know how to do that, do you mean I use a catch-basin with a 54" culvert and a 36" culvert, setup 54" culvert's "Routing" to be primary and setup 36" culvert's "Routing" to be device 1, like the following 1st screen shot? Or I use two catch-basin...
  14. galaxy2014

    How to simulate two pipe connecting with each other in HydroCAD?

    Hello, Please see the following screen shot, one smaller pipe connect to one larger pipe, if there is manhole or junction at their connection, does anyone know how to simulate the connection them in HydroCAD? Just create two catch-basin and connect them? Thank you
  15. galaxy2014

    How to simulate one culvert insert into another culvert in HydroCAD?

    Thank you for your reply, Peter. So if we suppose there is a manhole or junction at the connection of two pipes, how we simulate them? Now we use two catch-basins: one represent 36" RCP and another one represents 72" RCP, then how we connect them in HydroCAD?
  16. galaxy2014

    How to simulate one culvert insert into another culvert in HydroCAD?

    Hello, thank you for your reply. My case is in the screen shot as shown in the attachment, now I use catch-basin to simulate these two pipes, but how to connect them? The smaller pipe insert into larger pipe at its middle part and there is no junction box. Thank you
  17. galaxy2014

    How to simulate one culvert insert into another culvert in HydroCAD?

    Hello, I want to simulate the case that one small culvert inserts into one bigger culvert at its middle point, does anyone know how to do this in HydroCAD. Thank you so much.

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