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绳子与水桶
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[[Image:rope and bucket icon.png|right|80px]]
[[Image:RopeandBucketphoto.jpg|thumb|right|200px|绳子与水桶装置。塞内加尔考拉克地区,法斯•图库勒尔,图片来源: 绳子与水桶装置。塞内加尔的考拉克地区,法斯•图库勒尔,图片来源:
[http://appropriateprojects.com/node/731 (Fass Toucouleur)法斯•图库勒尔水井改善工程]]]
__NOTOC__ <small-title />
===适宜条件===
! style="background:#f0f8ff;" | 不足
|-
| valign="top" | - Simple technology which is inexpensive to build and maintain.技术简易,造价与维护费用低廉<br>- Can be operated at depths of up to 100 m.最深可在100米处运作<br>- Water Delivery from Animal Operated Rope and Bucket Water Lifter of over 200 l/min for double bucket system.通过畜力运作的绳与双桶提水装置能每分钟供水200多升<br>
| valign="top" | - Water Delivery from Human Operated Rope and Bucket Water Lifter is limited to 15 l/min.<br>
- Animals need to be maintained all year even when irrigation is not necessary.<br>
Range of depth: 0–15 m (or more sometimes).
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.