How does vegetation contribute to stormwater management?

Vegetation plays a crucial role in stormwater management primarily by absorbing rainfall and reducing runoff, which significantly improves water quality. When rainfall occurs, vegetation such as trees, shrubs, and ground cover intercepts rainwater. This process allows for greater infiltration into the soil, reducing the volume of surface runoff. The roots of plants help to stabilize the soil and increase its capacity to absorb water.

Additionally, vegetation can filter pollutants from the water that runs off into streams and other waterways. As water flows over and through vegetation, sediments and contaminants are trapped and broken down, contributing to cleaner water entering nearby water bodies. The interaction between soil and plant roots promotes biological activity that further purifies the water.

In contrast, the other options do not reflect the positive contributions of vegetation regarding stormwater management. While preventing soil erosion and blocking some rainfall are important as well, they do not encapsulate the full extent of how vegetation can manage stormwater effectively.