a form of erosion involving the formation of deep, steep-sided channels or gullies which cannot be removed by cultivation ( see rill erosion, sheet erosion)
A complex of processes whereby the removal of soil is characterised by large incised channels in the landscape. Processes include concentration of large volumes of surface runoff and dispersion of unstable subsoils.
occurs when rills develop to greater depths. Gully erosion usually occurs within 300m of rill erosion.