Hi,
I am observing sudden water age increases and drops in my model. I have only 2 pump stations in total and they are pumping water intermittently so I do understand when the flows are sudden and erratic but shouldn't water age just continue increasing up until a point instead of being so unstable as shown in the graph below? Should I try tweaking pumps to continuously pump throughout the day?
Thanks.
It is possible that slugs of old water and traveling back and forth in long pipes leading to a storage tank for example. See further guidance here: Troubleshooting Water Age Results
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.
I see. That may very well be true. What's a good way to avoid that?
Jesse Dringoli said:th in long pipes leading to a storage tank for exa
VM said:What's a good way to avoid that?
If you confirm that this is the case, it would be an engineering decision based on your knowledge of the real system and your design/budget constraints. Is this a new system or existing system? Confirm that all the data input is accurate and the base hydraulic model results are calibrated (if an existing system). For tanks, confirm that the appropriate mixing method is used.
If you confirm that water age is a problem near long lateral pipes connecting to tanks, check the pump controls to see if the cycling behavior can be changed to allow for the column of water in the lateral pipe to fully cycle. Try using a smaller diameter pipe if possible/feasible to increase velocity. Consider using scenarios to compare different options.