Eli5 Explain like I’m five What do those little black fabric fences used for around construction sites? I’ve always thought erosion, but what does one fence do?

Question

Seems like all the ground would erode to the fence?

In: 1

Answer 1

These are called sediment control or “silt” fences. Civil agencies are granted a permit by their state environmental agencies to operate and one of the requirements is to limit the amount of sediment that leaves the construction site, especially in regards to preventing it from entering natural waterways.