What is a large grooveor channel in the soil that carries runoff after a rainstorm?

A large groove or channel in the soil that carries runoff after a rainstorm is called a "gully." Gullies are formed by the erosion of soil due to the force of flowing water, typically found in hilly or sloped areas where water can easily accumulate and carve out the land. Gullies can contribute to soil degradation and landscape changes if left unchecked.