OWA-EPANET Toolkit  2.2


Defines all tank nodes contained in the network.


One line for each junction containing:

  • ID label
  • Bottom elevation, ft (m)
  • Initial water level, ft (m)
  • Minimum water level, ft (m)
  • Maximum water level, ft (m)
  • Nominal diameter, ft (m)
  • Minimum volume, cubic ft (cubic meters)
  • Volume curve ID (optional)
  • Overflow indicator (YES / NO) (optional)


  1. Water surface elevation equals bottom elevation plus water level.
  2. Non-cylindrical tanks can be modeled by specifying a curve of volume versus water depth in the [CURVES] section.
  3. If a volume curve is supplied the diameter value can be any non-zero number
  4. Minimum volume (tank volume at minimum water level) can be zero for a cylindrical tank or if a volume curve is supplied.
  5. If the overflow indicator is YES then the tank is allowed to overflow once it reaches it maximum water level. The default is no overflow.
  6. If the tank does not use a volume curve then an asterisk (*) can be used as a placeholder for it if an overflow indicator is specified.
  7. A network must contain at least one tank or reservoir.


;ID Elev. InitLvl MinLvl MaxLvl Diam MinVol VolCurve Overflow
;Cylindrical tank that can overflow
T1 100 15 5 25 120 0 * YES
;Non-cylindrical tank with arbitrary diameter
T2 100 15 5 25 1 0 VC1