What role do silt fences serve in erosion control?

Silt fences play a critical role in erosion control by filtering sediment from runoff water. They are designed as temporary barriers made of a permeable fabric that allows water to flow through while capturing larger sediment particles that may be suspended in the water. This filtration process helps reduce the amount of sediment that enters nearby water bodies, which can minimize water pollution and protect aquatic habitats.

The effectiveness of silt fences is particularly important on construction sites or areas of disturbed soil, where erosion risks are heightened. By retaining sediment, silt fences help maintain soil quality and prevent the degradation of local ecosystems. This function aligns with best management practices aimed at controlling erosion and sedimentation, particularly during rain events when runoff is most likely to occur.