What is stormwater runoff?

Stormwater runoff is the water that flows over surfaces such as roads, parking lots, roofs, and fields after precipitation occurs, including rain or melting snow. This runoff does not soak into the ground, which can lead to various environmental issues. As the water travels over these surfaces, it can collect and carry along various pollutants, including sediments, chemicals, and debris. This is crucial in understanding how stormwater can affect water quality in nearby streams, rivers, and lakes, potentially leading to pollution.

In contrast, the other options describe different processes or types of water interactions. Evaporation from water bodies refers to the process where water vapor is formed and released into the atmosphere, which is distinctly different from water that flows over ground surfaces. Water stored in reservoirs pertains to water collected for future use, separate from the immediate flow of surface runoff. Lastly, water absorbed by the soil is about infiltration, which is a critical process for groundwater recharge but does not involve the characteristics of stormwater runoff. Understanding stormwater runoff helps in identifying pollution sources and managing surface water quality effectively.