Types of Wells |
In general, there are two types of wells:
dug wells and drilled wells. The obvious difference between the
two is the size of the holes.
Dug wells are sunk by people
working down in the hole to loosen and remove the
soil. They need to be at least 1 meter wide
to give people room to work.
Drilled wells,
on the other hand, are sunk by using special tools
which are lowered into the ground and worked from the
surface. These wells are normally less than 30 centimeters (cm)
in diameter, and for the purpose of this manual, will
usually be less than 15 cm. The reason for this
is the difficulty of drilling larger holes with hand-powered tools.
In both categories, there are many different specific
sinking techniques which will be discussed in more detail later.