Expected performance benefits for various dewatering practices
Expected performance benefits for various dewatering practices.
Link to this table
| Sedimentation/ Settling Only (Sediment Traps/ Basins) | Filtration Only (Silt Fence, Dewatering Bag, Geotextile, etc.) | Pretreatment + Chemical Flocculants + Settling/Filtration ** | |
|---|---|---|---|
| Water quantity | |||
| Flow attenuation | Secondary benefit | Little or no benefit | Little or no benefit |
| Runoff volume reduction | Secondary benefit | Little or no benefit | Little or no benefit |
| Water quality | |||
| Soil erosion | Little or no benefit | Little or no benefit | Little or no benefit |
| Sediment control | Primary benefit | Primary benefit | Primary benefit |
| Nutrient loading | Secondary benefit | Secondary benefit | Secondary benefit |
| Pollutant removal | |||
| Total suspended solids | Primary benefit | Primary benefit | Primary benefit |
| Total phosphorus | Secondary benefit | Secondary benefit | Secondary benefit |
| Heavy metals | Secondary benefit | Secondary benefit | Secondary benefit |
| Floatables | Primary benefit* | Little or no benefit | Secondary benefit |
| Oil and grease | Primary benefit* | Little or no benefit | Secondary benefit |