Why are silt fences used in construction sites?

Silt fences are specifically designed to filter and contain sediment on construction sites and other land-disturbing activities. Their primary purpose is to prevent soil erosion and manage sediment runoff, which can contaminate waterways and disrupt the natural environment. When construction activities disturb the soil, especially during excavation, grading, or other similar operations, loose soil particles can easily be washed away by rainwater or construction runoff. Silt fences create a barrier that allows water to pass through while trapping the sediment that would otherwise flow into storm drains or nearby bodies of water.

The effectiveness of silt fences in sediment control is due to their structure, typically made from permeable fabric that can capture and hold back sediment-laden water. By strategically placing these fences around the perimeter of a construction site or at points where water might flow off, they play a crucial role in protecting the environment from sediment pollution. This practice is essential for complying with environmental regulations and promoting responsible construction practices.