Snowdrift

Women on top of snow drift near City Hall (16186848000)

Long Mynd snowdrift

Tall Snow Drift in Kenosha, Wisconsin

Snowdrift is a deposit of snow formed by wind into a mound during snowstorms. Snowdrifts can form in any area where snow is moved by wind, but they are more common in open and exposed places. Understanding the formation and characteristics of snowdrifts is important in various fields such as meteorology, civil engineering, and transportation.

Formation

Snowdrifts are formed when wind picks up loose snow from the ground and deposits it in areas where the wind speed decreases, such as the leeward side of obstacles, ditches, or any natural or man-made barriers. The shape and size of a snowdrift depend on several factors, including the wind speed, the amount of snow available for transport, the temperature (as it affects the snow's cohesiveness), and the topography of the landscape.

Types

There are two main types of snowdrifts:

• Lee-side drifts: These form on the downwind side of an obstacle, where the wind speed drops and snow particles accumulate.
• Windward drifts: Less common, these form on the side of an obstacle facing the wind, where snow is pushed against the object by the wind.

Impact

Snowdrifts can have a significant impact on human activities and the environment. In urban areas, they can obstruct roads, sidewalks, and entrances to buildings, requiring considerable effort and resources for snow removal. In rural and mountainous areas, snowdrifts can block roads and railways, isolate communities, and increase the risk of avalanches. For ecosystems, snowdrifts can alter the distribution of snow cover, affecting soil temperature, moisture levels, and the survival of plants and animals during winter.

Management

Effective management of snowdrifts is crucial for maintaining transportation networks and ensuring the safety of both urban and rural populations. Strategies include:

• Installing snow fences to control the placement of snowdrifts away from roads and pathways.
• Designing buildings and infrastructure to minimize the formation of problematic snowdrifts.
• Employing snow removal equipment and personnel to clear snowdrifts from critical areas.

Research

Research into snowdrifts focuses on understanding their dynamics and developing models to predict their formation and impact. This research is important for improving snow management strategies and designing infrastructure that can withstand winter conditions.

See also

• Snow
• Blizzard
• Winter storm
• Snow removal