Storm Water Pollution Prevention Plan (SWPPP) Practice Test

What is the key benefit of using vegetation in erosion control practices?

1. It decorates the site

2. It reduces soil temperature

3. It increases infiltration and reduces runoff

4. It requires less maintenance than other methods

The correct answer is: It increases infiltration and reduces runoff

The key benefit of using vegetation in erosion control practices is that it increases infiltration and reduces runoff. Vegetation plays a crucial role in stabilizing soil through root systems, which help bind the soil particles together, thereby minimizing the risk of erosion. The foliage of plants can intercept rainfall, reducing the impact of raindrops on the soil surface and enhancing water absorption. Additionally, vegetation can promote the formation of organic matter in the soil, which improves its structure and increases its ability to absorb water, leading to reduced surface runoff. This is particularly important in preventing soil erosion and maintaining soil moisture, which can be beneficial for surrounding ecosystems. The use of vegetation not only addresses the concerns of sediment loss and water quality degradation but also contributes positively to the overall health of the environment. The other options, while they may have some truth, do not capture the primary role that vegetation plays in erosion control as effectively as increasing infiltration and reducing runoff does.