I'm using the WaterGems Connect Editon, I'm trying to model a system that uses 2 interconnects daily. The first interconnect opens at 12:00 AM and closes once 150,000 gallons has passed through. The next interconnect has a booster pump station and operates as a lead until 375,000 gallons has been used (including the 150,000 from the first interconnect). The system also has 2 wells that operate as lag pumps while the interconnects are open, then switch to the lead controls once the 375,000 gallon target has been reached. Is their a way to model this situation other than using a FCV downstream of the interconnects and using Time from Start set to the time in the EPS where the target demand is reached in the system?
Hello Seth,
One option would be similar to the one you mention, by setting a control based on the Time from Start. You can use tools like the totalizing flow meter to help settle on the time you would need for the different controls.
Another option may be able to use a workflow similar to what you find in the following link: Creating a timer control to execute after a specific time period has elapsed. This method simulates a sort of timer using controls and may allow better precision compared to just the Time from Start control type. There is a sample model that is included in the link above that might be useful to get a general idea of the workflow.
Regards,
Scott
If there is a reason this system is setup with this kind of control, that may be helpful as well, at the very least for future enhancements to the program.
The municipality has a water use agreement with a neighboring one to purchase 375,000 gallons a day. Since that is a required number they want to use all of that water first before using their own well water.