What is Airport water balance?
An airport water balance is an accounting of all water entering an airport compared with all water used, metered and lost across terminals, tenants, cooling towers, irrigation, aircraft services and fire systems. When supply and use do not reconcile, the gap is unaccounted water, usually leaks in large buried networks or unmetered use.
What it is
Airports buy or abstract large volumes of water and distribute it through extensive networks, often decades old and partly buried under aprons and roads. Water feeds restrooms, food outlets, cooling towers, aircraft potable water, washing, landscaping and fire systems.
A water balance follows the basic equation: supply equals metered consumption plus unmetered authorized use plus losses. Splitting the network into zones, each with inlet meters, narrows down where losses occur, the same idea utilities use with district metered areas.
Because supply and use are measured continuously, a balance that stops reconciling is an early warning of a leak or a meter fault, long before the monthly bill.
Who it applies to / where it is used
Airport operators, their utilities and sustainability teams use water balances for leak detection, tenant recharging, cooling tower management and environmental reporting, and in water-stressed regions for drought planning.
How it is measured / what evidence it needs
A water balance needs supply meters, zone meters and major end-use meters that report on the same timeline.
- Bulk supply and any on-site sources
- Zone inlet meters across terminals, airside and landside
- Major end uses such as cooling towers, irrigation and aircraft water
- Night flow per zone as a leak indicator
- Unaccounted water as a share of supply over time
How Aqueduct helps
Aqueduct runs the airport water balance live on a digital twin, so losses are located by zone.
- aQ WaterGuard reconciles supply against zone and end-use meters every minute
- Night flow and burst detection flag leaks in buried mains
- Cooling tower makeup and blowdown are tracked as part of the balance
- Repairs route into the customer's CMMS and the balance verifies the loss has gone