International Rainwater Catchment Systems Conference
Catchment: An Answer to the Water Scarcity of the Next Millennium."
Petrolina, Brazil - July 1999
Section 12: Posters
Pošos Bate-estaca: Brazilian-Style Tube Wells
Humberto Alves J˙nior
48610-000 Gloria, BA Brasil
Tel: (075) 856-2132
Tube wells present a simple well sinking method. A boring iron
pipe with a steel plate on a lever sitting on frame is pushed up and down by a
few people, opening the well. The use of water in this operation, makes opening
the hole easier. In order to take out the soil, the boring pipe is taken out
and another similar iron pipe equipped with a valve is inserted to take out the
loosened soil. The boring holes have to be covered to avoid the surrounding
earth from closing the hole. This technique can be applied in sandstone areas,
but not in granite. Tube wells can be sunk to a depth of 90m.
Once the well is opened, one can use suction pumps or a pipe
with an valve attached to a cord with a pulley, which will be pulled out after
filling up. Local workers have carried out these well sinking task and their
participation has helped many communities. Tube wells have been a solution not
only for the water scarcity but also for lasting sustainable development,
improving the quality of life, combining economic efficiency (the wells are
cheap) and social justice, without harming the environment. A negative aspect
is the duration of the boring, but it is compensated with the cheap costs and a
simple technology accessible to all workers.
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