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河床喷射井与管井

59 bytes removed, 05:55, 8 November 2015
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[[Image:riverbed jetted and driven wells.png|right|80px]]
[[Image:dry riverbed well.jpg|thumb|right|200px|Halima Bidu在干涸的河床上从深土井中集水。图片来源：Siegfried Modola/Shoot the Earth（拍摄地球）/[http://www.actionaid.org/2011/08/why-drought-about-power-not-rain ActionAid（行动援助组织）]]]
[[Image:JettedDrivenWellPoint.jpg|thumb|right|200px|Jetted 冲击/ driven well point. Photo: WEDC 管井井点。图片来源：WEDC © Ken Chatterton.]]
__NOTOC__ <small-title />
This category includes short small diameter cylindrical screens (slotted or perforated pipes) that are inserted into unconsolidated sediments using water pressure or physical force, usually vertically or obliquely. Digging is not needed in this case.这类井含有小口径的短筒筛（割缝管或穿孔管），筒筛通常会通过水压或人力，垂直或倾斜地插入疏松的沉积物中。在这种情况下，并不需要挖掘。
===Suitable conditions适宜条件====
Due to pumping requirements, it is best to site these wells:
* Within 30 metres of the pump location.
Grace
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