Unbalanced System warning

[Chris]

Hi, 

im a new user of Epanet and reading few article pertain to Water distribution network using said software. Now i have small project yet gone thru all check of possible errors. But still getting unbalanced system warning for network distribution system.please let me know if my understanding are correct

1. unbalanced system is due to over produced water and less demand
2. tank level assignment initial level was high. But i already included an overflow pipe if such case all go outfall structure and yet are system is unbalance
3. the logical control assignment was not functioning well

another problem was there was huge flow on each tank but counter check using other software im arriving on different result but this was steady state.

could anyone give me hint to resolve the the warning. Im thinking to remove all tank instead use a reservior but the head is fixed and will arrive a different result if in reality 

the reservior are above ground tank ..

Regards,

Chris

[Lucas Vasconcelos]

Hi!
I took a look in your model and noticed some unnecessary and ilogical rules, for instance, your tank TA4 has a minimum level of 0.15 and maximum of 8.7. Pipe P1 looks like its main inlet pipe, but these rules:

LINK PIPE1 OPEN IF NODE TA4 ABOVE 8.70

LINK PIPE1 CLOSED IF NODE TA4 BELOW 8.70

Keep this main pipe always closed. Notice that if its maximum level is 8.7.

You do not have to open and close inlet nor outlet pipes when a tank is either full or empty. This rules are built in.

Whenever you notice pressures and heads being noted in scientific notation (8.324487E8) it means the software is either creating or destroying water, but depending on how it occurs the software won't even display the unbalanced warning.

Take a look in these rules!