What are rills in terms of soil erosion?

Rills are defined as small, narrow channels that form in soil as a result of surface water runoff. They are typically characterized by their depth, which is generally 3 inches or less, and they occur on slopes where water flows rapidly down the surface, eroding the soil. This erosion process can be seen especially during rain events, where the force of the water begins to carve out these channels. Rills are significant because while they may seem minor, they can lead to further erosion and the development of larger gullies over time if not managed effectively. Understanding rills is crucial for erosion control and managing sediment transport in various landscapes.