I'm in the process of updating my model but my model tanks are trending opposite of my field/SCADA tank trending. Demands have been updated via mass balance, scaled to match plant production and allocated via geocoded billing data by "closest node". All tank, pump and valve boundary conditions match field/SCADA. One tank trends opposite for the first three hours of the day then trends correctly, one tank is spot on, one tank trends correctly but the levels are way off, too low, then starting at 1500 hrs two tanks trending is off again. 24 hr EPS, 1 hour timestep reporting. Any suggestions would be greatly appreciated.

Happy 4th!!
Dean