In many cases hand-dug wells are not appropriate for local conditions because they are either difficult to install or unable to provide the water required for irrigation. ... another manual tubewell installation technique. It relies ... percussion and rotary methods, although it must be pointed out that in rural areas drill rigs are rare.
|Title||:||Lift irrigation in West Africa: Challenges for sustainable local management|
|Publisher||:||IWMI - 1995|