• Large Negative Pressure on model

    Hi, I am quite new to this software and am still in the learning process. I'd like to ask regarding a few uncertainties with my model which I believe are parts that I have missed out on. Firstly, I'd like to explain briefly on the background of the…
  • Flow - pressure relation, emitter coefficient

    Hello, I have a question related to the emitter coefficient of junction. My task is to determine how much will change the flow at the downstream reservoir(which in the program I consider as a junction) if we change pressure breaker elevation for +10m…
  • Partially Closed Valves in water supply system

    Hello, I'm modeling a high pressured water supply system full of partially closed valves (which people use as some kind of "prv's" to reduce pressure because they don't have enough money to buy it). The information they gave me is D(mm) of a valve,…
  • Can I associate a pattern of pressure into a junction?

    I'm building a model where I have pressure data in intervals of 15 minutes on a node and I would like to associate this information into the model, making the demands adjusts to obey the pressure measurement curve at the input node. is it possible?
  • Potable Water Distribution Design for communities - use of PRV's

    Hi all, I have a general question on the use of PRV's at individual services for a "closed" distribution system, i.e. pumps directly draw from a treated reservoir and feed to end-users with no elevated/pressure tank and storage elsewhere. I have come…
  • Optimizing pressures in a distribution network

    I am trying to optimise is the performance of PRVs in a distribution network. Is the Darwin designer the best application to use for this in WaterGEMS? It appears as though I can only select pipes for my design group. Is there a way I can select the all…
  • SIG Virtual Workshop: Bentley Hydraulics & Hydrology − December 20, 2017 - You're Invited!

    Don't miss the next Bentley Hydraulics & Hydrology Special Interest Group (SIG) virtual workshop on Wednesday, December 20, 2017 at 9 a.m. EST or 7 p.m. EST . The discussion will be led by Dr. Tom Walski P.E., Senior Product Manager, and will cover water…
  • Zero Flow after PRV valve in watergems

    Hi I have a large water distribution network modelling in watergems. in order to reduce pressures in a proper value, I have to place some PRV valves in the network. But when I put a PRV valve, and set the pressure, the flow in that pipe gets zero, resulting…
  • Re: Field pressure readings upstream and downstream of PRV. HGL or not?

    Normally the gauges will give you gauge pressure. You need to accurately measure the gauge's elevation, and add that to the pressure reading to get the HGL. Also, if the gauge measures pressure (e.g. in kPa), you will need to convert that to pressure…
  • Re: HOW MODEL COMBINATION AIR VALVES?

    If someone wants to model only the cascading flow downstream of an air-valve; that is, the transitional pressure to gravity type flow that might set up in a gravity trunk main or a sewer forcemain, they should take a look at the new WaterGEMS/WaterCAD…
  • Re: Pressure and Pressure Head, what are the differences?

    " Pressure head " is the " Pressure " divided by the specific gravity of your fluid, which you can change in the calculation options. So, they will only be equal if the specific gravity is 1.0 (using the same units for both, such as feet or meters) …