V- või kandilise U- kujulise ristlõikega negatiivne ajutise vooluvee uuristusvorm, mis kujuneb vihmauurde süvenemisel, V- or U-shaped channel (10s of metres deep and wide and hundreds of metres long) cut into the soil on a slope or hillside by the erosive action of temporarily flowing water. Very steep slopes are usually not covered with plants. Topography indented by gullies is called - badlands.