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RILL
(rill)
A
very small brook
Common
clues: Tiny
stream; Streamlet; Small brook; Moon valley; Lunar valley
Crossword
puzzle frequency:
once a year
Frequency
in English language:
74056 / 86800
A
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.
Some
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.
In
a few cases, rills may continue to grow and become gullies.
This
article is licensed under the GNU
Free Documentation License.
It uses material from the Wikipedia
article "Rill".
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