Different types of schemes implemented by PHED for providing
drinking water supply are as below:-
Piped Water Supply schemes
Piped Water Supply schemes are further sub divided into
following three categories:-
A. Gravity Feed Schemes:-
Spring/ Stream source is tapped by constructing a weir &
water is conveyed by gravity to a conventional type treatment plant consisting
of sedimentation tank, slow sand filter tank followed by a clear water
reservoir & eventually distributed to the villagers through a network of
distribution pipe lines by public stand posts/taps. In few schemes, rapid
gravity type treatment plant or simplified treatment plants were provided.
Whenever water source is a spring, treatment plants are not
provided, since the quality of raw water is fit for human consumption.
Few old schemes do not have treatment facility as the water
source was covered with forest during implementation.
During reconstruction of schemes at Sl(III) above, adequate
treatment facility will be provided.
B. River Pumping Schemes: - The source is river/ stream & water is
pumped to the treatment plant or intermediate sump. The treatment Plant &
distribution network are constructed/laid as in the gravity feed schemes.
C. DTW(Deep Tube well) Pumping Schemes:- These are same
as river pumping schemes except that source is under ground water, which is
tapped by drilling well. Generally quality of ground water is chemically safe
for all parameters except iron in some cases. Iron Removal Plants (IRPs) are
provided to tackle presence of excess iron in drinking water , wherever
Spot Sources Schemes
Spot Source Schemes are further sub divided into following
Hand Pumps (HPs):- Shallow/Deep bores are drilled & hand pumps are
installed for providing drinking water.
Wells: - Different types of wells constructed by the Dept. for
supplying water in rural areas are:-
Ring wells (RCC Rings are put one after another till the desired
level is reached)
Drinking wells/Dug Wells (instead of rings, stone/brick masonry
is used for lining the wells)
STC (spring Tapped Chamber):- In these schemes, chambers are
constructed at the mouth of the Spring Source, to protect the spring source