Storm Water Pollution Prevention Plan (SWPPP) Practice Test

Which best describes the role of ground cover in erosion control?

1. It enhances soil temperature

2. It supports the growth of weeds

3. It reduces soil exposure to wind and water

4. It increases soil compaction

The correct answer is: It reduces soil exposure to wind and water

The best description of the role of ground cover in erosion control is that it reduces soil exposure to wind and water. Ground cover, which can include vegetation, mulch, or other materials, plays a crucial role in stabilizing the soil by creating a protective layer that shields the soil surface from erosive forces. When ground cover is present, it prevents raindrops from directly impacting the soil, which can dislodge soil particles and lead to erosion. Additionally, the roots of the plants in the ground cover help bind the soil together, further reducing the risk of erosion caused by wind or water. This protective function is essential in maintaining soil health and preventing sediment loss, particularly in areas prone to erosion. In contrast, while ground cover can influence soil temperature and potentially hinder the growth of weeds, these aspects are secondary to its primary function of erosion control. Ground cover does not inherently increase soil compaction; in fact, it typically promotes better soil structure and aeration. So, the key benefit of ground cover lies in its effectiveness in minimizing soil exposure to erosive forces.