Certified Storm Water Operator Practice Exam

Which characteristic is crucial for vegetation to effectively handle runoff disposal?

1. Rapid growth rate

2. Well-established root system

3. Drought resistance

4. Height of plants

The correct answer is: Well-established root system

A well-established root system is crucial for vegetation to effectively handle runoff disposal because it plays a significant role in stabilizing the soil and enhancing water infiltration. A strong root network allows plants to anchor themselves deeply into the ground, which can prevent soil erosion and enable better absorption of water. When runoff occurs, the roots help bind the soil particles together, mitigating the risk of sediment being washed away. Additionally, a robust root system promotes the movement of water through the soil profile, allowing for better distribution of moisture and nutrients to the plants. This can lead to increased growth and overall health of the vegetation, further supporting its ability to manage runoff and improve water quality. While rapid growth, drought resistance, and plant height may offer some benefits, it is the root structure that fundamentally enhances the soil's capacity to manage water effectively.