冲沟是由间断流水在地表冲刷形成的沟槽。冲沟是侵蚀沟中规模最大的一种，长度可达数千米或数十千米，深度可达数米或数十米，有时可达百米以上。冲沟在丘陵和山区很普遍。 A gully is a groove formed by erosion of interval water flow in ground surface. A gully can be thousands to tens of thousands of meters long, and meters to a hundred meters deep. Gullies can be commonly seen in hilly and mountainous areas.