What should runoff velocities be kept at to effectively manage runoff on construction sites?

Keeping runoff velocities low and retaining water is essential for effective management of runoff on construction sites. High runoff velocities can lead to increased erosion, which can displace soil and sediment, harming both the construction site and the surrounding environment. When water flows quickly, it can carry more sediment and pollutants into nearby water bodies, contributing to water quality issues and potentially violating environmental regulations.

By maintaining low velocities, the runoff can be managed more effectively. This allows time for sediment to settle and for sediment controls, such as silt fences and sediment basins, to function properly. The slower water movement promotes better infiltration into the ground, reducing surface runoff and enhancing water quality by allowing for natural filtration processes.

In summary, managing runoff velocities by keeping them low and focusing on retention helps to minimize erosion, protect local waterways, and ensure compliance with environmental standards on construction sites.