Sediment Control Methods: Basins, Traps, Check Dams & Wattles

Larger, engineered impoundments typically used for bigger contributing drainage areas, designed to hold runoff long enough for suspended sediment to settle before discharge. Basin sizing has to account for the full build-out drainage area, not just current-phase conditions.

Smaller and simpler than basins, used for limited drainage areas or as a supplemental measure alongside other BMPs — a reasonable choice where a full basin isn't warranted by the contributing area.

Small barriers placed across channels and swales to slow concentrated flow velocity, encouraging sediment to drop out before it travels further downstream. Spacing and height need to match the channel's grade and expected flow.

Flexible, tube-shaped barriers placed at flow concentration points or along contours on slopes, often used in areas where staked silt fence isn't practical or as a supplemental measure alongside other controls.

The right sediment control isn't a single default choice — it depends on contributing drainage area, flow concentration, available space, and how the method integrates with the rest of the site's BMP plan.