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Under proper field management rills are small and are easily repaired by contour tilling the soil. This will prevent, for a time at least, the rills from growing and eroding the landscape more rapidly with time.<ref>http://dhn.iihr.uiowa.edu/runoff/erosion.htm</ref>
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==Artificial rills==
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[[File:Freiburg Baechle Rills.jpg|thumb|Artificial Rills, known locally as [[Freiburg Bächle]], run through the old-town district of the German city of [[Freiburg im Breisgau]].]]
[[File:Falaj at al ain.jpg|thumb|upright=.6|right|225px|An artificial '''rill''', part of the ''Falaj'' [[water transportation]] system, at [[Al Ain]] [[Oasis]], in the [[Abu Dhabi (emirate)|Abu Dhabi Emirate]].]]A constructed functional '''rill''' is a small [[canal]] or [[:aqueduct (water supply)|aqueduct]] of [[stone]], [[brick]], [[concrete]], or other lining material; usually [[wikt:rectilinear|rectilinear]] in [[Cross section (geometry)|cross section]]; for [[water transportation]] from a source such as a [[river]]-[[stream|creek]], [[spring (hydrosphere)|spring]], [[reservoir]], [[qanat]], or [[Aqueduct (water supply)|aqueduct]]; for [[Domestic market|domestic]] consumption or [[agriculture|agricultural]] [[irrigation]] of [[Arable land|crop land]] uses.
Rills were traditionally used in [[Middle East]]ern and [[Mediterranean climate]] cultures of ancient and historical eras; and other climates and continents worldwide. They are distinguished from a 'water [[ditch]]' by being lined to reduce absorption losses and to increase durability. The ''Falaj'' irrigation system at the [[Al Ain]] [[Oasis]], in present-day [[Abu Dhabi (emirate)|Abu Dhabi Emirate]], uses rills as part of its [[qanat]] water system. Sometimes in the [[Spanish language]] they are called ''[[Acequia]]s''.
Rills are also used for aesthetic purposes in landscape design. Rills are used as narrow channels of water inset into the pavement of a [[garden]], as linear [[water feature]]s, and often [[tile]]d and part of a [[fountain]] design.
The historical origins are from [[paradise garden]] religious images that first translated into ancient [[Persian Gardens]]. Rills were later exceptionally developed in the [[Moorish architecture|Moorish]] [[Spanish garden|(Spanish) Gardens]] of [[Al-andalus]], such as at the [[Alhambra]] in [[Granada]]; and also in other [[Islam]]ic gardens, cultures, and countries. Early 20th century examples are in the [[Plaza de España (Seville)|Maria Louisa Park]] gardens in [[Seville]], [[Spain]]; and at the [[Casa del Herrero]] gardens in [[Montecito, California]].
==See also==
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