• Change scale, model is at a wrong location

    Hi, Did you build a model at a wrong location because of the units? And now you wish to change the coordinates (or multiply them by a certain factor)? Besides opening up the model in other platforms like MicroStation & AutoCAD and messing with, you…

  • Conduits being over-designed (oversized) during a design run on a system with very shallow slopes

    Product(s): StormCAD, CivilStorm, SewerGEMS Version(s): 08.11.03.77 and higher Area: Output and Reporting Problem Why is StormCAD over-designing the conduits during a design run on a system with very shallow slopes? (during…

  • Fire Duration

    Dear Bentley, I create fire flow scenario for system consist of tank, fire pump and water network, I set up the fire parameter and run the model, that is ok as usual as normal project, now let us say the fire duration is Two hours, how can I make this…

  • How to assign load at manhole by using thiessen polygon in SewerGEMS for Arcmap directly

    Hello I am working with SewerGEMS for Arcmap. I have some question related to this design: 1) while working with thiessen polygon I am not able to draw thiessen polygon directly. please suggest me step for draw polygone. 2) how to assign unit load…

  • importing demands into an existing model from excel data

    Is there a way to import demand data into an existing model? I have an existing model with approximately 13,000 customers. I've been trying to come up with a method of importing customer demands from meter read data via an excel file. We currently…

  • Massive negative pressures induced by a FCV

    Hi! I’m trying to calculate the energy produced by a turbine in the given network. The junction J-1 has a specific demand that changes hourly and the max operating point of the turbine is 96 l/s. During some hours the demand is higher than 96l/s so…

  • Pumps Multistage, Hammer

    I'm also working on a project with submersible multistage pumps. I´d like to know How to set this model in Hammer v8i. Please is very important.

  • Reservoirs to tanks - back flow?

    I am quite new to WaterCAD and just want to size a pipe between a reservoir and a tank. I need to get 47,500m3/day from the reservoir and into the tank in 4 hours. I have placed the reservoir and the tank and connected them with a 1500mm pipe as…

  • SewerGEMS / SewerGEMS Sanitary questions about best practices

    Hi, I just started working with SewerGEMS v8i to design both water distribution and wastewater systems, and so far so good, but I do have some practical questions that I'd like to ask - I've skimmed through the forum for similar questions and couldn…

  • Static Head in WaterCAD

    WaterCAD generates nice system head curve if the model has (reservoir -pump - reservoir) configuration. I have other case which common force main; two pumps joining one force main as shown in the screenshot below, the question is: why when one pump is…

  • WaterCAD VSP + Upstream Control Change: Wrong pump speed/HGL

    Here's an interesting EPS brainteaser that one of our WaterCAD user group gave me to look at for some diagnostics. For certain timesteps, when a pump is turned On by Controls, a downstream Variable Speed Pump would not calculate the right pump speed…
    • ExampleVSDPump.zip

  • WaterGEMS Constituent Analysis

    I attempting to create zone of influence diagrams for our distribution systems. The way I am going about it is to utilize the constituent calculation option. From what I understand, if I have a system that has three water treatment plants I must creat…

  • Why does StormCAD Oversize Pipes?

    I have been designing gravity networks using Bentley products for a few years and have always found issues with the automatic pipe sizing function choosing pipes sizes larger than they need to be. For example, a have a pipe network running crown to…

  • Wrong Hydrant Curve Results?

    This one is driving me in--sane! I can't figure out whether this is a bug or a nuance of the modelling engine, but the hydrant curves in some of our models are not returning the correct results. The attached model is a case in point: 1. Two different…
    • Hydrant Flow Curve Issue_Snapshot.zip
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