Casting apron in a borehole is needed for preventing
pollution underground
and to fix pedestals.
The
pedestal is necessary for installing any kind of pump in the
borehole.
We
use 1:2:3 ratio to mix cement, sand and hardcore for
casting. The casting is reinforced with wire mesh.
The
recommended length in Uganda for drainage channel is 3m in
a sloping area and 6 m in a flat place.
Soak
pit at the end of the drainage channel is not recommended by
Uganda's Directorate of Water Development in prevention of
creating breeding areas for mosquitoes and other insects. |