I've skeletonized the model as much as possible from another post on this forum, but still seeing the same result. What would cause the water age (max. calculated) to change from new to old back to new in a run without any branches connected to the mainline? Attached is a screenshot of the situation. Duration is 30 days.
Color coding is as follows: Purple <= 60 hrs, Blue <= 120 hrs, Cyan <= 240 hrs, Green <= 360 hrs, Orange <= 480 hrs, Red <= 600 hrs, Dark Red > 600 hrs.
I have uploaded the file in a zip file named: 31091_Montgomery_County_Water_Model
Hello,
This may be due to flow reversals at some key locations in your network (as you have marked on the schematic). For example pipe BT-P-166 is having flow fluctuating between 103.7 to 103.69 for the entire simulation. Hence the water age is higher in this pipe because the old water has not left the system as expected.
Due to this behavior there are some unexpected results that can be seen in the water age calculation.
Here is a relevant article which discusses troubleshooting water age results which can help you.
Troubleshooting water age results
Regards,
Yashodhan Joshi
Thank you for the reply. I used that article to simplify before submitting the question here, which helped. I believe the issue may have to do with pipe size, and flow path to & from the tanks.
Hello TJ,
If you are still seeing an issue, we would likely need a copy of the model. In needed, please use the instructions here to send the model files.
Scott