| Well Sections |
Every well, whether drilled or dug, has three
sections: top, middle, and bottom. Each of these sections varies
in construction, because each must function differently.
Top section - That part of the well at or above the
ground surface level. It should be designed to allow people
to get water as easily as possible, and, at the
same time, to prevent water, dirt, and other contaminants from entering.
Middle section - That part of
the well which is between the ground surface and the
water, This section is usually a circular hole. It is
reinforced with some kind of lining to prevent the walls
from caving in.
NOTE: Lining
and casing refer to the same part of the well. Lining is used to refer
to that part of the dug well, while casing refers
to the pipe used to reinforce a drilled well.
Bottom section - That part
of the well that extends beneath the water table into
the aquifer. It should be designed to allow as much
water as possible to enter, and yet prevent the entrance
of any soil from the aquifer. Its lining will have
holes, slots, or open spaces, allowing water to pass through.