The Treadle Pump: An Exercise in Productivity

treadleFarmers in Bangladesh have long had an irrigation problem. Water is often plentiful in ponds or in the shallow water table underfoot, but getting that water onto the crops is no easy task. Diesel pumps are expensive, and there just aren’t enough hours in the day to fully water the land with a bucket.

A solution has appeared in the form of the treadle pump, a sort of Stairmaster that pumps water. The device takes water-carrying work away from a polluting machine and puts in the hands (or rather under the feet) of the farmer.

Invented by in 1981 by an aid worker, the treadle pump has sold more than 1.4 million units in Bangladesh, according to IDE (PDF file), with many more in use in India and Africa. They range in price from $20 to $100 and may be made of metal or bamboo.

Twenty hours a week on the water treadmill will irrigate a quarter-hectare field – enough to empower a farmer to grow an extra crop cycle each year, to make each crop more robust, and bring home more money for the family.

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