Certified Storm Water Operator Practice Exam

_____________ erosion is the removal of a uniform layer of soil from rain-splash and storm water runoff.

1. Sheet

2. Rill

3. Gully

4. Wind

The correct answer is: Sheet

Sheet erosion refers to the process where a thin layer of soil is removed uniformly over a wide area due to the impact of rain and the movement of stormwater. This type of erosion typically occurs on relatively flat land where water flows as a thin sheet, rather than being concentrated in channels or rills. The uniformity of the soil removal distinguishes sheet erosion from other types of erosion like rill or gully erosion, which involve more localized and concentrated water flow that carves deeper channels into the soil. Understanding the characteristics of sheet erosion is essential for designing effective sediment and erosion control practices in stormwater management, as this form of erosion can contribute significantly to the loss of topsoil and degrade soil quality.