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===建造、运作与维护===
[[Image:RopeandBucketdrawing.jpg|thumb|right|200px|Rope and bucket lifting device. Drawing: WHO.绳桶提水装置。图片来源：WHO（世界卫生组织）]]Range of depth: 0–15 m (or more sometimes).深度范围：0–15米（或有时甚至更深）。
The simplest and cheapest method of lifting groundwater remains a rope and bucket in a wide, shallow well. This type of well can operate up to a depth of 100 metres, although they rarely exceed 45 metres. The rope and bucket lifter can be operated by humans or animals. Human operated rope and bucket lifters typically raise 10-15 litres/min from depths of 10-15 metres whereas an animal water lifter can raise 150 litres/ min from 15 metres. In the animal driven rope and bucket lifter, the rope attached to the bucket is passed over a pulley and fixed to the animal. The animal is driven down on an earthen ramp sloped at an angle of 5-10 degrees in order to lift the water.
