Gully formation is a research area within geomorphology that focuses on the processes and mechanisms by which large channels or erosion features, known as gullies, are formed in the Earth's surface. Gullies are typically deep and narrow channels that are formed by the erosion of soil and rock, often caused by the concentrated flow of water during rainfall events or by other erosional processes. Research in gully formation often involves studying the factors that influence the initiation and development of gullies, such as the slope of the land, the type of soil or rock present, the amount and intensity of rainfall, and human activities such as deforestation or agriculture. By understanding these factors, researchers can better predict where gullies are likely to form and develop strategies for managing and mitigating their impact on the landscape.