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pressure dependent demands
Africa
Criticality
HAMMER
intermittent supply
leakage
PDD
Transient Analysis
utilization
Water Loss
WaterCAD
WaterGEMS
PDD functionality to estimate utilization
Yashodhan Joshi
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…
Answered
3 months ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Pressure dependent demand and Hammer transient simulation
Youssef Al Fahham
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
over 3 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Re: Pressure dependent demand functions
Mal Sharkey
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…
over 13 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Re: Flow after closed pipe
Mal Sharkey
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…
over 13 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Re: WaterGEMS-calibration with special network
Jack Cook
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…
over 14 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
Re: Criticality & PDD
Jesse Dringoli
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…
over 12 years ago
OpenFlows | Water Infrastructure
OpenFlows | Water Infrastructure Forum
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