Certified Storm Water Operator Practice Exam

Implementing green roofs is an effective practice for reducing stormwater runoff because they utilize vegetation and soil to absorb rainwater. This method minimizes the amount of stormwater that flows directly into the drainage system by retaining rainwater, allowing it to evaporate and transpire rather than contributing to surface runoff. Green roofs also help in improving insulation for buildings, enhancing biodiversity, and reducing urban heat effects.

In contrast, constructing more impervious surfaces, increasing paved areas, and using synthetic materials all contribute to an increase in stormwater runoff. Impervious surfaces prevent water infiltration into the soil, leading to greater volume and speed of runoff, which can overwhelm drainage systems and enhance the risk of flooding, erosion, and water pollution. Therefore, the implementation of green roofs stands out as a sustainable practice aimed at mitigating the impacts of stormwater runoff.