• Actual Fire Flow Much Lower than the Ones in the Model

    Dear Community I just had 16 hydrant tests throughout a City of about 30,000 to calibrate the water model. When I compared the fire flows with the model, actual fire flows were lower by 700 gpm on average , 600 gpm on median. At one location, it was…
  • Calibrating a Model Using Residual Pressure Measured at Flushing Hydrants

    I am calibrating a model for a City with population of about 30,000. This is a newly created model and C-values and pipe connectivity was updated. We also imported customer meter data so a 5-year average demands are imported at the exact locations …
  • How to model discharge to atmosphere point

    HI, I'm working on my college project (The project is a plumbing system to drain a 1-m3 tank in the shortest time ). I use the discharge to atmosphere element at the end of the project but I'm really confused with this element's input data like [Flow…
  • Question of EPS

    Hi everyone There are two scenarios which both of them are 'base' (non of them is child of another one). I want to set the 'Time analysis type' of first scenario 'EPS' and set the second one 'Steady State', but could not. Is there any way to have both…
  • about efficiency and wirt-to-water efficiency

    Hi everyone What is the differences between 'efficiency curve' and 'wire-to-water efficiency curve' in 'combination pump curve' tool? Mohsen
  • A question of 'Maximize benefit' is remained.

    Hi About 'Dimensionless' & 'unitized' and 'pressure coefficient' & 'pressure exponent' in Darwin Designer, I do not know enough yet. somebody please explain them more. Thankx alot. Mohsen
  • Another question of 'Fire Flow' analysis

    Hi everyone Which ‘zone’ is considered by WaterGems When we define ‘pressure (zone lower limit)’ in ‘fire flow manager? WaterGems analyse the fire flow for junctions of which zone? I did not find the answer for this question in 'support solutions…
  • About 'fire flow' analysis

    Hi everyone maybe we need to define various 'fire flow constraints' (to opposite different fires) in 'fire flow manager page' for various nodes then how we can do it? For example if several junctions with various 'fire flow demands' are needed, then…
  • About 'fire flow' analysis

    Hi everyone We determine both ‘pressure constraint’ and ‘fire flow constraint’ in ‘fire flow manager page’, but IT bases ‘pressure constraint’ as basic fact, fixes it and calculates available fire flow according to ‘pressure constraint’. Maybe the …
  • 'positive and negative volume' for reservoirs

    Hi What does 'positive and negative volume' mean for 'reservoir' or 'junction' or another elements (except pipes) in 'totalizing flow meters'? I encountered a 'negative volume' for a reservoir. Mohsen
  • 'Positive' & 'negative' in Totalizing Flow Meters

    Hi everyone What does 'Positive volume' and 'Negative volume' when calculating volume of flow in 'Totalizing Flow Meters'? Apparently it does not follow clockwise and unticlockwise rotation of flow. Mohsen
  • Transient

    Hi everyone Would you please do me a favor and explain more and plain about 'transient simulation and analyses'? In 'Help' I got a few about it and can not understand -for example- what is 'Wave speed' or 'Vapor volume' at pipe and junctions 's properties…
  • Calculation Options

    Hi everyone What is the difference between 'Calculation Types' (Age, Hydraulic Only, Fire Flow and ...) in 'Calculation Options'? if 'Hydraulics Only' be selected, then 'Fire Flow' and 'Age' and 'Trace' could not be calculated and have not any result…
  • Complete model

    Hi everyone Studying WaterGems, I was going to make a network which had all elements (Pipe, Jinction, Valves, Pumps, Tank, Reservoir and ...), But I guessed maybe such thing exists in WaterGem’s Lessons or Samples. Does Watergems has such complete network…
  • WaterGems/WaterCad

    Hi everyone Three questions: 1- What are the differences between WaterGems and WaterCad? 2- What does 'Capita' mean in WaterGems? 3- WaterCad is combination of Water & Cad, then Is WaterGems combination of Water & Gem(s)? Thank everyone. …
  • manual designer run

    Hi everyone In the 'design study' and in it's 'cost/properties' tab, I defined two 'new pipe' 1 and 2: In 'new pipe1' there are 2 pipes defined (with 100 & 150mm as diameters) In 'new piupe2' there are 2 pipes defined (with 32 & 40mm as diameters…
  • Error in WaterGEMS V8i (Selectseries 1)

    Hi, I saved a project in WaterGEMS V8i (Selectseries 1) several days ago, but I can't to open this file now. When I open this file in WaterGEMS I recive a error mesage in below. Please help me.
  • WaterGems VSD Pumps in Parralel and error message 41797

    I am using Watergems V8i series 3, and trying to model a pump station with two identical VSD pumps in parallel. When I set the pumps up in parrallel, i.e. by just making them have a common node on either side of the pumps, the system balances but only…
  • Water Distribution Modeling Software Survey

    Hello, If you have a few minutes please fill out this short survey to help the Bentley Institute Geospatial team create better training that is more suited to the workflow of our users. http://www.surveygizmo.com/s3/568508/Water-Distribution-Modeling…
  • Question of Darwin Designer1

    Hello In ‘Darwin Designer’ and in it’s ‘boundary override’, I set closed ‘value’ for a pipe attribute (pipe status), then run the design machine. When it made design for my model, I look at the ‘pipe’ which had been assumed ‘closed’ and it’s status…
  • Simple gravity-fed water distribution system

    Hello – I am trying to model an existing gravity-fed water distribution system for a small rural community using WaterGEMS V8i. The existing system is as follows: There is a ~13,000 L storage tank atop a hill with a single outlet; this outlet is connected…
  • Variable Speed Pump - Suction Side Control

    Hi I am modelling a pump station in WaterGEMS which is supplied from a distribution network and is not hydraulically close to any tank, hence it draws down the pressure on the suction side and in the network whenever it operates. The pumps are speed…
  • Re: WaterObjects API - read node demands

    By the way, a useful tidbit in relation to the exception you were experiencing... When working with the computation engine API (in Haestad.Calculations.Pressure....) if you handle (catch) exceptions you can obtain more detail information about…
  • help how import node elevation from auto cad to watergems

    hi dear im biginner in watergems 1 someone state me how can import node elevation from auto cad to watergems. 2- how can assign demand to node plz state exactly tnx