An ephemeral gully is a small, temporary channel formed by the concentration of runoff during heavy rainfall or snowmelt. These gullies can quickly erode and transport significant amounts of soil, contributing to landscape change and soil degradation. The study of ephemeral gullies is important in soil conservation, hydrology, and erosion control.
Source Poesen, J., Nachtergaele, J., Verstraeten, G., & Valentin, C. (2003). “Gully Erosion and Environmental Change: Importance and Research Needs.” Catena, 50(2-4), 91-133.