Cheshmai Water Supply Scheme
Installation of Diesel Tube Well for Uplifting and
Distributing Potable Water to Nearby Villages
1.
General.
There is an old underground water source at a new Androon Cheshmai
located in a nullah of Cheshmai ( Dhand Saghri). Although the source is of
limited yield, yet it slowly flows throughout the year , the water is sweet and
available at surface requiring limited drilling only. However ponding
arrangements shall be required in addition before uplifting to main reservoir. Since
the site is located at a lower ground, therefore it requires uplifting of water by about 600 feet and then distribute
it by gravity to villages of Androon Cheshmai, Cheshmai Bala, Lashkari Banda,
Talub Khel, Mera Khel, Rehman Abad, Maluk Khel, Tarkipal and adjoining hutments
in the area. It is aimed at alleviating the sufferings of over 6000 needy people
in these villages.
2.
The Scheme.
The scheme consists of following projects:
a.
Resistivity Survey of proposed site.
b.
Installation of diesel Tube Well.
c.
Lifting of water to main reservoir and further
distribution by gravity to sub-reservoirs.
3.
Resistivity Survey. By working on the earth surface it
is possible to some extent to estimate where ground water occurs. Investigation
of ground water from the surface is not 100 % successful; however such methods
are normally less costly as developed in the last 30 years and have been proved
useful for locating and analyzing ground water. In this particular case it is
necessary to investigate subsurface porous zones to determine the most suitable
site for sinking the proposed tube well. It normally costs Rs. 25000/- per single job.__________A
4.
Installation of
Diesel Tube Well. Owing to non-availability of Pesco
electricity in the area, the installation of diesel tube well has been
proposed. The detailed estimates of its cost, capacity 180 gpm, is as under:
a.
Mobilization of Plant :
Rs. 25000.00 LS.
b.
Drilling Charges of 15” Dia bore 200 feet @ Rs.
600/ft: Rs.
120000.00
c.
Cost of 136’ MS Blind Pipe 10” dia @ Rs.500/ft : Rs.
68000.00
d.
Cost of 64’ MS Screen 10” Dia @ Rs.550/ft :
Rs.35200.00
e.
Cost of Bail Plug and L/Cap :
Rs.1000.00
f.
Gravel packing of 200’ bore @ Rs.80/ft :
Rs. 16000.00
g.
Lowering Charges @ Rs.40/ft : Rs.
8000.00
h.
Cost of locally made Turbine Pump of capacity 180 gpm
Head 200’: Rs. 120000.00
i.
Cost of 4” Booster Pump of 675’ head multi
stage(locally made) : Rs.45000.00
j.
Cost of Diesel Engine New
: Rs.1,50,000.00
k.
Cost of pullies, counter shaft and fitting
charges : Rs. 20,000.00
Total : Rs.
7,58,200.00__B
5. Lifting of Water
to Main Reservoir and Further Distribution.
To calculate
total dynamic head it is necessary to first calculate friction losses:
a.
Friction losses in 4” steel pipe =
1.86 ft per 100 ft.
b.
Friction losses in 4” dia 90 deg flanged bend = 5.9 ft per bend.
c.
Friction losses in 4” dia 45 deg flanged bend = 3.5 ft per bend.
d.
Friction losse4s in 4” dia flanged Tee = 2.8 ft
per Tee.
e.
Vertical head =
600 ft.
f.
Friction losses in 600’ pipe 4” dia= 6x1.86 = 11.16 ft.
g.
Friction losses in 4 Nos 90 deg bend= 4x5.9= 23.6 ft.
h.
Friction losses of 5 Nos 45 deg bend = 5x3.5= 17.5 ft
i.
Friction losses of 1 no tee 4” dia =1x2.8= 2.8 ft.
j.
Velocity head =
20 ft.
k.
Total dynamic head= 600+11.16+23.6+17.5+2.8+20 = 675.06 Say 675
Ft.
6.
Pumps Specifications
a.
Turbine Pump
(1) Pump Size 4 “,
Pump setting 100 Ft.
(2) Discharge of
Pump = 180 gpm.
(3) Head = 200 ft.
(4) Efficiency of
Pump = 40.5 %.
(5) HP_ Qh_
= 180x200x100 = 22.4 Say
23 HP.
3960 3960 x 40.5
b.
Booster Pump
(1) Pump Size 4’.
(2) Discharge = 180 gpm.
(3) Head = 675 ft.
(4) HP_ Qh_
= 180x675 x 100 = 47.2
Say 48 HP.
3960 3960 65
7.
Engine
Specifications
a. Type : High
Speed Diesel Engine (New).
b. Cooling
System: Water cooled.
c. Clutch assembly
duly completed.
d. HP of Engine: Turbine
Pump HP= 23
Booster Pump HP = 48
Mechanical losses = 9____
Total : = 80 HP.
8.
Area Wise Water
Requirement. Besides
one main reservoir, three sub-reservoirs shall be built in different population
centers each away by about 1 to 3 km from the main reservoir. These
sub-reservoirs shall get the water through gravity with 4” dia and 3”dia steel
pipes. The local people will get water through their own means from these
sub-reservoirs. Pipe connection to each house in these villages shall be
arranged through a separate project later.
a. No of houses in
Area 1 :
200
b. No of houses in
Area 2 :
200
c. No of houses in
Area 3 :
400
d. No of family
members per house : 7
e. Consumption of
water per head:
7 USG per day.
f.
Water required per house : 7x7=
49 gpd.
g. Water required
by animals: Dry cow= 12 gpd x 1 No= 12 gpd.
Milk producing cow= 20 gpd x 2 Nos=
40 gpd.
Goat/ sheep = 2 gpd x 10 Nos=
20 gpd.
Total ; 72 gpd.
h. Misc
requirements per house:
10 gpd.
i.
Total requirement per house: 49+72+10= 131 gpd.
j.
Total requirement in each area:
a. Area 1 : 200
houses x 131 = 26200 gpd.
b. Area 2 : 200
houses x 131 = 26200 gpd.
c. Area 3 : 400
houses x 131 = 52400 gpd.
d. Total in the
project area : 1,04,800 gpd.
9. Sizes of Reservoirs.
a. Main Reservoir :
14’ x 14’ x 8’ = 1568 Cu ft=1568 x 7.5 = 11760 gallons.
b. Reservoir 1
: 12’ x 12 ‘x 8’ = 1152 Cu Ft = 1152 x
7.5 = 8640 gallons.
c. Reservoir 2
: 12’ x 12’ x 8’ = 1152 Cu Ft = 1152 x
7.5 = 8640 gallons.
d. Reservoir 3
: 14’ x 14’ x 8’ = 1568 Cu Ft = 1568 x
7.5 = 11760 gallons.
10. Cost of Reservoirs and Engine Room:
a. Main Reservoir/Pond
= Rs 35000.00
b. Reservoir 1 = Rs. 25000.00
c. Reservoir 2 = Rs. 25000.00
d. Reservoir 3
= Rs. 35000.00
e. Engine
Room= Rs. 15000.00
(10’ x 10’ x 8’)___________________
Total : Rs. 1, 35, 000.00_________C
11. Cost of Pipe Lining with Accessories.
a. Supply and
fixing 2 No Pressure Gauge @Rs.500/- each:
Rs.
1000.00
b. Supply and
fixing Tee 4”dia @ Rs.1200/-, 2 Nos:
Rs. 2400.00
c. Supply and
fixing Flanged Bend 4”—90 Deg 6 Nos @
Rs. 1100/- each: Rs. 6600.00
d. Supply and
fixing Flanged Bend 4”, 45 Deg, 5 Nos @ Rs.900/-each: Rs.4500.00
e. Supply and
fixing Gate Valve 4”, 2 Nos @ Rs.5796/- each: Rs.11592.00
f.
Supply and fixing Gate Valve 3”, 2 Nos @ Rs.3276/-
each : Rs.
6552.00
g. Supply and
fixing Tee 3” Dia 2 Nos @ Rs. 850/- each : Rs.1700.00
h. Supply and
fixing Reducer 4 x 3 @Rs.300/- : Rs. 300.00
i.
Supply and fixing Bend 3” Dia 4 Nos @ Rs. 850/- each
: Rs.
3400.00
j.
Supply and fixing GI Pipe 4” Dia 600+5280+5880 Ft @
Rs.250/- ft : Rs. 1470000.00
k. Supply and
fixing GI Pipe 3” Dia 5280+5280=10560 Ft @ Rs.169/- ft: Rs.1784640.00
Total: Rs. 33,33,684.00______D
12. Total Cost of the Scheme
a.
Resistivity Survey
:
Rs. 25000.00 __________ A
b.
Installation of tube
well :
Rs. 7,58,200.00_________ B
c.
Construction of
reservoirs
Rs. 1,35,000.00 _________ C
d.
Pipe Lining Rs. 33,33,684.00_________D
Total : Rs. 42,51,884.00
e.
10 % escalation
charges+ Contingency: Rs.
425188.00
G. Total: Rs. 46,77,072.00
Say Rs. 4.7 M
Prepared By: Hydro Traders, Circular Road, Yakatoot , Peshawar
Ph: 0300-5984982.
Date: 24. 4. 2009 Signature
_______________________
Mr. Mahmood Khan
Drilling Engineer(Retired)
Agriculture Engineering Department
Government of NWFP Peshawar.
