Qatium calculates tank autonomy for each tank in the network from the selected time onwards. Here's how it works:

1. Initial calculation: From the selected time, Qatium calculates how the tank’s volume decreases using the simulated outlet flow, continuing until the end of the simulation period.
2. Determining the autonomy time. There are two possible outcomes:
   1. If the tank empties before the simulation ends: The autonomy is the exact moment the tank volume reaches zero, based on the dynamic flow during the simulation.
   2. If the tank still has water at the end of the simulation: Qatium estimates how much longer it would take to empty the tank using a constant outlet flow. This constant flow is the average of the simulated outlet flow between the selected time and the end of the simulation. This approach ensures we take into account real variations in flow before making any assumptions.

Special cases

• Tank starts empty at the selected time: Autonomy is 0. No evolution data will be displayed in the graph.
• No outlet flow during the remaining simulation period: Autonomy is not applicable (N/A). No evolution data will be displayed in the graph.
• If the estimated autonomy is 1 year or more: Qatium doesn’t display this result, showing autonomy as N/A and no evolution data in the graph.