airport cleaning during snowfall: high-speed operation to ensure flights

Snowfall for a modern airport is not a reason to stop work, but a complex but routine engineering task, solved with military precision and speed. The process of snow removal on the runway is a synchronized work of special equipment, meteorological services, and controllers, where each element is subordinate to a single goal: to keep the runway surface, taxiways, and aprons in a state as close as possible to dry. A delay of a few minutes here results in millions of dollars in losses and a chain reaction of failures in the global aviation network.

Phase 1: Preparation – Work before the snow

The effectiveness of snow removal is determined by the actions taken in advance.

Monitoring and forecasting. The airport meteorological support service works on the basis of its own sensors installed around the perimeter of the field and data from national meteorological agencies. It is not only the expected precipitation that is important, but also the temperature of the runway surface, dew point, wind speed and direction. The decision to start snow removal is made several hours before the snowstorm.

Assembling the "snow caravan" (Snow Team/Fleet). This is a special column of equipment, the composition of which is strictly regulated. A typical caravan includes:

Rotary snowplows: Powerful machines with a rotating screw and a rotor, capable of throwing wet and compacted snow up to 50 meters. This is "heavy artillery" for heavy snowfall.

Plough blowers: Machines that combine an shovel for collecting snow and a fan for throwing it.

Pavers/Tampers: Compact the loose snow to facilitate its subsequent cutting.

Chemical reagent spreaders. Do not use ordinary salt, which causes corrosion of the aircraft skin. Special liquids based on potassium acetate or glycol, as well as solid granulated reagents (urea, potassium formate) are used. Their task is to prevent the formation of a "snow-surface" bond, so that snow can be easily removed mechanically.

Phase 2: Operation – Snow removal during the snowstorm

Snow removal is carried out on the principle that "the snowflake should not have time to stick".

The "Follow-the-storm" tactic. The snow removal column is formed in strict order and moves along the runway in a single column ("train"). Machines go with a minimum interval, covering the entire width of the runway (from 45 to 60 meters). In one pass, they perform a full cycle: cutting, removal, treatment with reagent. Work is carried out around the clock as long as it snows.

Priority. First, the main runway is cleared, then the parallel one (if there is one), then the critical taxiways leading to it. After that, the rest of the taxiways and aprons. Often, two columns working towards each other are used to double the speed.

Quality control. After each pass, the coefficient of friction (friction) of the surface is measured by special friction machines. Data is transmitted in real time to the control service. A minimum coefficient of friction (usually 0.3-0.4) is required for landing. If the indicator is below, the cleaning continues or the runway is closed.

Phase 3: Logistics and snow disposal

Removing snow from the airport territory is a task almost equal to its removal. Snow from the runway cannot be stored nearby due to the risk of attracting birds and creating obstacles. It is removed to special snow dumps outside the airport or, more effectively, melted immediately at stationary snow melting stations. In Helsinki-Vantaa Airport (Finland), a system of heating aprons is used for cleaning, and snow from the runway is removed and melted using excess heat from server centers.

Interesting facts and examples:

"20-minute rule" in Switzerland: In large airports, such as Zurich, there is an internal standard: the runway must be fully cleared and put into operation within 20 minutes after the end of an intense snowstorm. This requires perfect coordination and preparation.

Thermal chambers in Japan: In airports prone to snowstorms (such as Sapporo New Titosé), giant hangars-snow melting stations are used. Snow is loaded inside, where it melts under the action of heat guns or heat recovery systems.

"Chemical fluid" technology in the USA and Canada: Before the snowstorm, the runway is treated with anti-icing fluid of the type "Kilfrost" or "Safewing". It forms a temporary film that prevents snow and ice from sticking for several hours, which facilitates mechanical cleaning.

Human factor: Despite automation, the final inspection of the runway is always carried out by an inspector on a special vehicle or even on foot to visually ensure the absence of foreign objects (FOD - Foreign Object Debris), ice, or uncleared areas.

Conclusion: technological balance

Snow removal at the airport is an ongoing race against time and nature, where victory is determined not by the power of a single machine, but by the coordination of the system. This is a balance between preventive chemical treatment, high productivity of mechanical cleaning, and operational logistics. Modern airports consider snow not as an act of God, but as a planned seasonal phenomenon to which they prepare in advance, investing in a park of specialized equipment, training personnel, and creating infrastructure for disposal. Thanks to this, even in the worst snowstorms, the largest hubs in the world maintain their operability, ensuring global mobility.

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