• PDD functionality to estimate utilization

    Hi, Using the pressure dependent demands (PDD) functionality in WaterGEMS gives us an output of "Demand Shortage" at the junction which is either positive (deficit) or negative (excess). Can this be interpreted as additional demand that can be consumed…
  • Pressure dependent demand and Hammer transient simulation

    Hello, How does Hammer treat an active PDD alternative in a transient simulation? Is PDD only for WaterGEMS EPS or is it also applicable to Hammer for transient analyses? Regards, Youssef
  • Re: Pressure dependent demand functions

    Mohamad, In addition to the advice Mark and Nancy have given you, I would like to point some background about pressure dependent demands. WaterGEMS, EPANET, and other similar software packages typically solve for head in the system given the system…
  • Re: Flow after closed pipe

    The other option in situations like this is to use "Pressure Dependent Demands" (PDDs). When using PDDs, the software doesn't try to blindly satisfy the entered demands when it is impossible to do so. Instead, if there is not enough pressure in the…
  • Re: WaterGEMS-calibration with special network

    Pierre, I'm not familiar with specific Tanzanian issues but I know that systems that experience Intermittent supply are quite challenging. There are two very good case studies located at our Water Loss pages. Both deal with modeling intermittent…
  • Re: Criticality & PDD

    Hello Rasha, First, the Criticality tool does show which nodes are effected. To illustrate, take a look at the "CritStart.wtg" file that's included with the installation, under \Program Files\Bentley\WaterGEMS\Lessons\ . In the below screenshot, I…