concepts
type: Collection
type: ConceptGroup
member: rill erosion

geomorphology
type: Concept
narrower: rill erosion

rill erosion
type: Concept
broader: geomorphology
definition: Rill erosion is the process by which numerous sub-parallel and randomly occurring small channels are formed on slopes by running water. Usually, if channel cross sections are smaller than 900 cm2 (square centimeters; 30 cm x 30 cm), they are called erosion rills. [Source: Encyclopedia of Geography; Rill Erosion]