How dense must the vegetative cover be to confirm successful final stabilization?

Successful final stabilization of a site through vegetative cover is typically confirmed by achieving a specific density that indicates the site is adequately protected against erosion. In many guidelines, achieving 70% of the native background vegetative cover is the benchmark that suggests the establishing vegetation is sufficient to stabilize the soil. At this density, the plant roots can provide effective anchoring to the soil, while the above-ground biomass can reduce the impact of raindrops on the soil surface, thereby minimizing erosion.

This threshold is based on research and practical experience demonstrating that a vegetative cover around this percentage is generally effective in controlling sediment and preventing erosion, as it creates a more stable microenvironment within the soil. Vegetation also helps manage water infiltration and runoff, further enhancing the effectiveness of erosion control.