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  • Dimensionless Huff 10-50 2ndQ 50% and 50-400 3rdQ 50% distributions throw an index was outside the bounds of the array error

    Applies To Product(s): PondPack Version(s): 08.11.01.56 Area: Layout and Data Input Original Author: Mark Pachlhofer, Bentley Technical Support Group Problem When I try to use a dimensionless…
  • Is it possible to delete an element from one scenario, but retain it in another?

    Applies To Product(s): WaterCAD, WaterGEMS, SewerGEMS, CivilStorm, StormCAD, PondPack, SewerCAD, HAMMER Version(s): CONNECT Edition, V8i Area: Modeling Original Author: Scott Kampa, Bentley Technical Support Group …
  • How will my peak flow results be affected if I use cumulative storm opposed to incremental storm?

    I understand the difference between incremental and cumulative when it comes to inputting storm data into PondPack, but I need a better understanding of why I get different peak flows when using cumulative. What does PondPack do differently for the calculation…
  • Error Installing: "Error 1935. An error occurred during the installation of assembly"

    Applies To Product(s): WaterGEMS, WaterCAD, HAMMER, SewerGEMS, SewerCAD, StormCAD, CivilStorm, PondPack Version(s): CONNECT Edition, V8i Area: Installation Problem When installing a Bentley Hydraulics and Hydrology…
  • PondPack - Trouble Modeling an Outlet Control Structure

    I've been tasked with modeling this outlet control structure using PondPack. I've run into two problems: 1.) modeling the T-shaped weir near the top of the wall without double-counting the flow of the initial 1' wide weir section. Modeling the shape…
  • Irregular Weir Flow Calculations in a Composite Outlet Structure

    Product(s): PondPack, SewerGEMS, CivilStorm Version(s): CONNECT Edition Area: Calculations Problem How is weir flow calculated when using the Irregular weir option in a composite outlet structure, in PondPack, SewerGEMS or…
  • 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…
  • Catchment flow is zero even though correct storm is selected

    Product(s): PondPack Version(s): 10.02.00.01 Area: Calculations Problem Catchments have zero flow (zero peak flow, hydrograph at a constant flow of zero) after creating and assigning a new storm event. Solution First…
  • How can I apply a rainfall depth or intensity to a dimensionless curve to create a storm event?

    Applies To Product(s): SewerGEMS, CivilStorm, StormCAD, PondPack, SewerCAD Version(s): CONNECT Edition, V8i Area: Layout and Model Input Original Author: Mark Pachlhofer, Bentley Technical Support Group …
  • Modeling Ponds with Pumps

    Product(s): SewerGEMS, CivilStorm, PondPack Version(s): V8i, CONNECT Edition Area: Modeling Problem How can I model a pumped pond with the Implicit or Explicit (SWMM) dynamic solver? (a pond that is drained with a pump instead…
  • Error message: "Unrecognized database format ..." when trying to open model

    Applies To Product(s): FlowMaster, WaterCAD, WaterGEMS, HAMMER, SewerGEMS, SewerCAD, StormCAD, CivilStorm, PondPack Version(s): CONNECT Edition, V8i Original Author: Mark Pachlhofer, Bentley Technical Support Group…
  • Modeling Multiple Outfall Structures from One Pond in PondPack

    I am designing a sand filter/pond in PondPack (CONNECT edition) which needs two outlet structures in order to split the outflow from the pond to two different outfalls. The outflow needs to be split in order to meet pre-development flow requirements.…
  • Windows 11 Compatibility for OpenFlows Products

    Product(s): WaterGEMS, WaterCAD, HAMMER, SewerGEMS, SewerCAD, StormCAD, CivilStorm, PondPack, FlowMaster, CulvertMaster, FLOOD Version(s): CONNECT Edition Area: Installation Problem Are the OpenFlows products compatible with…
  • Warning about outlet hydrograph not cresting

    Product(s): Bentley PondPack Version(s): 08.11. Area: Output and Reporting Problem In pondpack, what does the following warning mean: " WARNING: Outflow hydrograph never crested (last ordinate= max outflow). " Problem Number…
  • More than one runoff node was entered for Rational network - Message id 28

    Good morning. I am modeling 2 interconnected detention ponds with an outfall at the downstream pond. Separate catchments are connected to each pond, and I get the message above. Can you help explain?
  • How do I know if and when my pond is overtopping and how to quantify it?

    Product(s): Bentley PondPack, SewerGEMS, CivilStorm Version(s): V8i, Connect Edition Area: Modeling Problem Description How do I know if and when my pond is overtopping? How do I know how much of water is overflowing from…
  • Pondpack - Bioretention Basin Design - How to model an underdrain perforated pipe?

    We're using PondPack to design a bioretention basin with an perforated underdrain pipe. How should we go about modeling this in the software? Thanks, R
  • Downstream ID Help

    I am trying to understand what calculations PondPack uses when you set culverts as a Downstream ID. I created a model that is utilizing culverts as the main outfall which will discharge directly upstream of a culvert crossing. I have the pond outfall…
  • PondPack - Storm Data - Varying Time Step

    I am looking to insert the below precipitation data for the 2, 25 and 100 year storms into PondPack as provided by the AHJ. This specific data set has a varying timestep which does not align with the standard storm event input. Can you please assist me…
  • Modeling evaporation in a pond?

    Product(s): SewerGEMS, CivilStorm, PondPack Version(s): CONNECT Edition Area: Modeling Problem How can I model evaporation from a pond in SewerGEMS and CIvilStorm? Solution With PondPack or the Implicit dynamic solver…
  • How to restore a backup copy of model files

    Applies To Product(s): WaterGEMS, WaterCAD, HAMMER, SewerGEMS, SewerCAD, StormCAD, CivilStorm, FlowMaster, CulvertMaster Version(s): 10.xx.xx.xx, 08.11.xx.xx Area: Output and Reporting Original Author: Mark Pachlhofer…
  • OpenFlows PondPack

    For solutions and answers to questions about PondPack, use the search bar above or find an index of Technotes and FAQs here: PondPack Technotes and FAQs For training and information for new users, see: Learning Resource Guide for new users of P…
  • How do I set up a catchment to use DelMarva Dimensionless Unit Hydrograph?

    Applies To Product(s): PondPack, SewerGEMS, CivilStorm Version(s): CONNECT Edition, V8i Area: Layout and Data Input Original Author: Mark Pachlhofer, Bentley Technical Support Group Problem …
  • Can't select any elements in a PondPack model.

    Every now and then I have a PondPack model that "breaks" and suddenly I cannot select any of the elements. It is not frozen, I can still zoom in/zoom out, run the model, etc. But the selection box that appears when you click and drag to select multiple…
  • Can catchments be locked from being moved or edited?

    Applies To Product(s): SewerGEMS, CivilStorm, StormCAD, PondPack, SewerCAD Version(s): CONNECT Edition, V8i Area: Layout and Data Input Original Author: Mark Pachlhofer, Bentley Technical Support Group…