Which technique is commonly used in sediment control on construction sites?

Silt fences and sediment traps are widely recognized as effective techniques for sediment control on construction sites. These physical barriers are designed to intercept and slow down the flow of sediment-laden water, allowing sediment to settle out before the water is discharged into surrounding areas. Silt fences are typically made of a geotextile fabric that is woven or porous, enabling water to pass through while capturing particulates.

Sediment traps, on the other hand, are usually excavated depressions or containers that temporarily hold water, allowing sediment to settle out of the water column. This method is particularly useful in reducing the amount of sediment that can enter waterways, which is crucial for protecting water quality and aquatic habitats.

The other options like water pumps, chemical treatments, and underground piping systems do play roles in water management but are not primarily aimed at sediment control. Water pumps may be used for removing standing water but do not treat or control sediment directly. Chemical treatments may control specific contaminants but do not concentrate on sediment issues, and underground piping systems focus more on drainage than sediment filtration. Thus, silt fences and sediment traps remain the best-suited methods for addressing sediment runoff at construction sites.