This manual explains in practical terms the basic drilling techniques. It describes the use of fluid circulation in soft ground formations, and com- pressed air and hammers for hard rock. It discusses well design, types of pump and their installation, screen selection, and testing.
BALL, P. (2001): Drilled Wells. (= Series of Manuals on Drinking Water Supply , 6 ). St. Gallen: Swiss Centre for Development Cooperation in Technology and Management (SKAT) URL [Accessed: 11.03.2019] PDF