very small brook
stream; Streamlet; Small brook; Moon valley; Lunar
once a year
in English language:
74056 / 86800
rill is a narrow and shallow incision into soil resulting from
erosion by overland flow that has been focused into a thin thread
by soil surface roughness. Rilling, the process of rill
formation, is common on agricultural land and unvegetated ground.
rills will continue to grow, as they are widened and/or deepened
by the runoff which flows through them. Other rills may decline
in importance as sediment is deposited within them. Eventually, a
hydrologically efficient rill network will be formed. The
development of such a network is an example of self-organisation.
a few cases, rills may continue to grow and become gullies.
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