Rill erosion
"Rill erosion results from the concentration of surface water (sheet erosion) into deeper, faster-flowing channels. As the flow becomes deeper the velocity increases detaching soil particles and scouring channels up to 30cm deep. Rill erosion represents the intermediate process between sheet and gully erosion." (Tasmanian Government. n.d.)
Sources
Tasmanian Government. n.d. "Rill Erosion", accessed November 07, 2023, https://nre.tas.gov.au/agriculture/land-management-and-soils/soil-manag….