What function do silt fences serve in stormwater management?

Silt fences play a critical role in stormwater management by helping to control sediment runoff. They are specifically designed to intercept and filter sediment from runoff water before it can enter larger bodies of water, such as rivers, lakes, or streams. By doing so, silt fences reduce the amount of sediment that gets transported, which is essential for maintaining water quality and preventing erosion.

The primary function of a silt fence is to act as a barrier that slows down the flow of water, allowing sediments to settle and be trapped behind the fence. This is particularly important at construction sites or other disturbed areas where soil is vulnerable to being washed away. Thus, utilizing silt fences effectively contributes to compliance with regulations regarding sediment control and plays a significant role in protecting aquatic ecosystems.

While options that mention increasing stormwater volume or eliminating all types of pollutants are not accurate representations of silt fence functions, the correct answer emphasizes the essential role of silt fences in minimizing sediment that can contribute to water pollution.