Snow fence

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Snow fence

A snow fence is a structure used to force windblown, drifting snow to accumulate in a desired place. These fences are primarily employed to manage snowdrifts and prevent snow from accumulating on roads, railways, and other critical infrastructure. Snow fences are commonly used in regions that experience heavy snowfall and strong winds.

Design and Function

Snow fences work by disrupting the flow of wind, causing it to lose energy and deposit snow on the leeward side of the fence. The design of a snow fence typically includes vertical slats or a mesh that allows some wind to pass through while reducing its speed. This reduction in wind speed causes the snow to settle and form a drift.

The height, length, and placement of a snow fence are critical factors in its effectiveness. The fence is usually placed at a distance from the area to be protected, typically 20 to 35 times the height of the fence. This distance allows the snow to accumulate in a controlled manner, forming a drift that does not encroach on the protected area.

Types of Snow Fences

There are several types of snow fences, including:

• Permanent snow fences: These are typically made of wood, metal, or other durable materials and are installed in locations where snow management is a recurring need.
• Temporary snow fences: These are often made of plastic or lightweight materials and can be easily installed and removed as needed.
• Living snow fences: These consist of rows of trees or shrubs planted to act as a natural barrier against snowdrifts. Living snow fences provide additional environmental benefits, such as habitat for wildlife and erosion control.

Applications

Snow fences are used in various applications, including:

• Roads and highways: To prevent snow from drifting onto the road surface, reducing the need for snow removal and improving safety.
• Railways: To keep tracks clear of snow and ensure the safe and efficient operation of trains.
• Airports: To manage snow accumulation on runways and taxiways, ensuring safe aircraft operations.
• Agriculture: To protect crops and livestock from snowdrifts and to manage snowmelt for irrigation purposes.

Installation and Maintenance

Proper installation and maintenance are essential for the effectiveness of snow fences. Key considerations include:

• Ensuring the fence is anchored securely to withstand strong winds and heavy snow loads.
• Regularly inspecting the fence for damage and making necessary repairs.
• Clearing accumulated snow from the leeward side of the fence to maintain its effectiveness.

Related Pages

• Snow
• Wind
• Road
• Railway
• Airport
• Agriculture