• Composite outlet structure for Ponds

    When doing a new composite outlet structure with orfice and weir, does the rating table information need to be something that is put in prior to running the model? or is the rating table and curve table populated after running the model? I am updating…
  • Why does adding a spillway as a separate pond outlet all of a sudden cause it to engage when it previously wasn't?

    I am modeling a pond with a composite outlet structure (riser with orifice openings). My pond has a spillway and at first i was modeling the riser/ orifice and spillway as a single composite structure connected to an outlet pipe. After some research on…
  • How does PondPack calculate the rating curve for an irregular weir (specifically a trapezoidal weir)?

    I have tried to replicate the calculations using the standard weir equation [Q = CLH^(3/2)], but have since realized that PondPack must be applying an additional factor to the calculation that is based on the head, because the factor varies as the head…
  • Composite outlet structures for a Pond

    Hello, There is this pond which outlets to a culvert. There is an orifice, weir and ICD located downstream of the culvert at the same location but in different levels. Can you please tell me how can these three control structures be modeled using…
  • Weirs design problems

    I am designing a sewer network with several weirs and outfalls. For modelling the weir I am using a control structure (inline weir) in the rainwater outlet and a orifice control structure in the waste water outlet. The obtained results…
  • Weir configuration on SewerGEMS

    Hi guys, I'm modelling a wastewater network on Sewergems and i'm facing some difficulties on the configuration of the weirs.I'm having two different problems. On some weirs the water due to rainfall is not discharged, continuing on the network (first…
  • Inverted Siphon and Control Structure

    I have an inverted sewer and complex control structure that I would like to model in SewerCAD. The system is single 72" gravity pipe into a junction box. The normal flow out is through a 36" siphon. There are two side weirs, each at a different elevation…
  • CivilStorm-Weirs

    I'm trying to model an existing outlet control structure with a rectangular weir. The dimensions of the weir are 4" x 18.5". I enter the length into the program as 4". Is there a way for me to define the height? I know in PondPack it lets you enter a…
  • Re: SewerGEMS pond outlet structure problem

    You should have the overflow weir control as part of an outlet structure. However if your outlet structure is connected to a pipe downstream, the model will assume that all the flow has to go over the weir and then through the pipe. The capacity of the…
  • Re: CivilStorm-Weirs

    Faria, The weir height extents to the upstream element's maximum elevation. In the case of a pond, it's the pond's top elevation. You can see the max/min headwater and tailwater (like in Pondpack) if you click "control structure" in the control…