Leaking Computation

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Location: Zone 6, Culianan, ZC.
25-May-15 to 26-May-15
Given:
Line Pressure ( P )
Size of damage ( D)
Duration of leak (t)

= 10 psi
= 100 mm or 10 cm
= 21 hrs

Formula used :
P = ƴh ;
V²=(2gh);
Q= AV
Vol= Qt
Computation:
P = ƴh ;

10 lb/in2

h=

62.43 lbs/ft3

h=
h=

1ft
12in

3

276.79 in
23.06 ft

V²=(2gh);

[

V²= 2(32.2ft/s²)(23.06ft)

]

V=38.54 ft/s

A=

_πD²_
4

= π(10cm x in/2.54cm x 1ft/12in)²
4
A= 0.0845 ft²
Q= AV;
Q= 0.0845 ft² (38.54 ft/sec)
Q= 3.26 ft³/sec
Vol = Qt;
Vol = 3.26 ft³/sec (21 hrs x 3600 sec/hr)
= 246,456 ft³ x (1m/3.28 ft)³

Vol.= 6,984.22 m³

1ft
12in

3

Location: Fernando Compound, Sta. Maria, ZC.
31-Mar-15 to 01-April-15
Given:
Line Pressure ( P )
Size of damage ( D)
Duration of leak (t)

= 18 psi
= 50 mm or 5 cm
= 24 hrs

Formula used :
P = ƴh ;
V²=(2gh);
Q= AV
Vol= Qt
Computation:
P = ƴh ;

18 lb/in2

h=

62.43 lbs/ft3

h=
h=

1ft
12in

3

498.22 in
41.52 ft

V²=(2gh);

[

V²= 2(32.2ft/s²)(41.52ft)

]

V= 51.71 ft/s

A=

_πD²_
4

= π(5cm x in/2.54cm x 1ft/12in)²
4
A= 0.0211 ft²
Q= AV;
Q= 0.0211 ft² (51.71 ft/sec)
Q= 1.09 ft³/sec
Vol = Qt;
Vol = 1.09 ft³/sec (24 hrs x 3600 sec/hr)
= 94,176 ft³ x (1m/3.28 ft)³

Vol.= 2,668.82 m³

Location: Presa, Canelar (Perimeter Fence of KCC Mall Construction Site), ZC.
31-Mar-15 to 01-April-15
Given:
Line Pressure ( P )
Size of damage ( D)
Duration of leak (t)

= 6 psi
= 19 mm or 1.9 cm
= 72 hrs

Formula used :
P = ƴh ;
V²=(2gh);
Q= AV
Vol= Qt
Computation:
P = ƴh ;

6 lb/in2

h=

62.43 lbs/ft3

h=
h=

1ft
12in

3

166.07 in
13.84 ft

V²=(2gh);

[

V²= 2(32.2ft/s²)(13.84ft)

]

V= 29.85 ft/s

A=

_πD²_
4

= π(1.9cm x in/2.54cm x 1ft/12in)²
4
A= 0.00305 ft²
Q= AV;
Q= 0.00305 ft² (29.85 ft/sec)
Q= 0.091 ft³/sec
Vol = Qt;
Vol = 0.091 ft³/sec (72 hrs x 3600 sec/hr)
= 23,587.20 ft³ x (1m/3.28 ft)³

Vol.= 668.43 m³

Republic of the Philippines
ZAMBOANGA CITY WATER DISTRICT
Pilar st., Zamboanga City

ACCOUNTED WATER LOSS DUE TO PIPE DAMAGES
ZONE 6, CULIANAN, ZAMBOANGA CITY
TIME

DATE
start

DURATION
end

(hours)

LINE
PRESSURE
(psi)

5/25/2015

1:00 PM

12:00 AM

11.00

10

5/26/2015

12:00 AM

10:00 AM

10.00

10

FERNANDO COMPOUND, STA. MARIA, ZAMBOANGA CITY
TIME

DATE
start

DURATION
end

(hours)

LINE
PRESSURE
(psi)

3/31/2015

4:00 PM

12:00 AM

8.00

18

4/1/2015

12:00 AM

4:00 PM

16.00

18

PRESA, CANELAR (PERIMETER OF KCC MALL CONSTRUCTION SITE) ZAMBOANGA CITY
TIME

DATE
start

DURATION
end

(hours)

LINE
PRESSURE
(psi)

7/17/2015

1:00 PM

12:00 AM

11.00

6

7/18/2015

12:00 AM

12:00 AM

24.00

6

7/19/2015

12:00 AM

12:00 AM

24.00

6

7/20/2015

12:00 AM

1:00 PM

13.00

6

the Philippines
TY WATER DISTRICT
amboanga City

SS DUE TO PIPE DAMAGES

N, ZAMBOANGA CITY

VOLUME
cum

DAMAGE ITEM
100mmØ PVC Pipe at Zone 6,
Culianan, ZC.
TOTAL

3,658.40
3,325.82
6,984.22

STA. MARIA, ZAMBOANGA CITY

VOLUME
cum

DAMAGE ITEM
50mmØ GI Pipe at Fernando
Compound, Sta. Maria, ZC.
TOTAL

889.61
1,779.21
2,668.82

ALL CONSTRUCTION SITE) ZAMBOANGA CITY

VOLUME
cum

DAMAGE ITEM

102.12
19mmØ PE Tubing at Presa,
Canelar, ZC. (Only 1 water service
connection)

222.81
222.81
120.69

TOTAL

668.43

Location: Infront KCC Mall Construction Site
7-Nov-15
Given:

Line Pressure ( P )
Size of damage ( D)
Duration of leak (t)

= 20 psi
= 25mm x 450mm
= 12 hrs

Formula used :
P = ƴh ;
V²=(2gh);
Q= AV
Vol= Qt
Computation:
P = ƴh ;

20 lb/in2

h=

62.43 lbs/ft3

h=
h=

1ft
12in

3

553.58 in
46.13 ft

V²=(2gh);

[

V²= 2(32.2ft/s²)(46.13ft)

]

V= 54.51 ft/s

A=_base x height
= (2.5cmx45cm)x(in/2.54cm x 1ft/12in)²
A= 0.1211 ft²
Q= AV;
Q= 0.1211 ft² (54.51 ft/sec)
Q= 6.601 ft³/sec
Vol = Qt;
Vol = 6.601 ft³/sec (12 hrs x 3600 sec/hr)
= 285,163.20 ft³ x (1m/3.28 ft)³
Vol.= 8,081.13 m³

Republic of the Philippines
ZAMBOANGA CITY WATER DISTRICT
Pilar st., Zamboanga City

ACCOUNTED WATER LOSS DUE TO PIPE DAMAGES
INFRONT KCC MALL CONSTRUCTION SITE
TIME

DATE
start
11/7/2015

1:00 AM

(hours)

LINE
PRESSURE
(psi)

12

20

DURATION
end
1:00 PM

he Philippines
Y WATER DISTRICT
mboanga City

SS DUE TO PIPE DAMAGES
CONSTRUCTION SITE

VOLUME
cum

DAMAGE ITEM
2.5CM X 45CM LONGITUDINAL
DAMAGE OF 150MMØ PVC
PIPELINE
TOTAL

8,081.13
8,081.13

Republic of the Philip
ZAMBOANGA CITY WATE
Pilar st., Zamboanga

ACCOUNTED WATER LOSS DU

ZAMBOWOOD, ZAMBOAN
TIME

DATE
start

DURATION
end

(hours)

LINE
PRESSURE
(psi)

11/27/2015

1:00 PM

12:00 AM

11.00

10

11/28/2015

12:00 AM

12:00 AM

24.00

10

11/29/2015

12:00 AM

12:00 AM

24.00

10

11/30/2015

12:00 AM

12:00 AM

24.00

10

12/1/2015

12:00 AM

12:00 AM

24.00

10

12/2/2015

12:00 AM

12:00 AM

24.00

10

12/3/2015

12:00 AM

12:00 AM

24.00

10

12/4/2015

12:00 AM

10:00 AM

10.00

10

COVARRUBIAS DRIVE, DIVISORIA, Z
TIME

DATE
start

DURATION
end

(hours)

LINE
PRESSURE
(psi)

12/11/2015

8:00 PM

12:00 AM

4.00

10

12/12/2015

12:00 AM

6:00 AM

6.00

10

2:00 PM

3:00 PM

1.00

10

Republic of the Philippines
ZAMBOANGA CITY WATER DISTRICT
Pilar st., Zamboanga City

COUNTED WATER LOSS DUE TO PIPE DAMAGES
ZAMBOWOOD, ZAMBOANGA CITY
h = P/δ

DAMAGE ITEM

Velocity

area

discharge
ft3/sec

(ft2)

100mmØ PVC Pipe at
Zamboowood, ZC.

23.07

1,485.44

38.54

0.0845

3.26

23.07

1,485.44

38.54

0.0845

3.26

23.07

1,485.44

38.54

0.0845

3.26

23.07

1,485.44

38.54

0.0845

3.26

23.07

1,485.44

38.54

0.0845

3.26

23.07

1,485.44

38.54

0.0845

3.26

23.07

1,485.44

38.54

0.0845

3.26

23.07

1,485.44

38.54

0.0845

3.26

TOTAL

COVARRUBIAS DRIVE, DIVISORIA, ZAMBOANGA CITY
h = P/δ

DAMAGE ITEM

Velocity

area

discharge
ft3/sec

(ft2)
50mmØ PE Tubing at Covarrubias
Drive, Divisoria
TOTAL

23.07

1,485.44

38.54

0.00305

0.118

23.07

1,485.44

38.54

0.00305

0.118

23.07

1,485.44

38.54

0.00305

0.118

VOLUME
ft3

VOLUME
cum

129,096.00

3,658.40

281,664.00

7,981.96

281,664.00

7,981.96

281,664.00

7,981.96

281,664.00

7,981.96

281,664.00

7,981.96

281,664.00

7,981.96

117,360.00

3,325.82
54,875.98

VOLUME
ft3

VOLUME
cum

1,699.20

48.15

2,548.80

72.23

424.80

12.04
132.42

Location: Presa, Canelar (Perimeter Fence of KCC Mall Construction Site), ZC.
31-Mar-15 to 01-April-15
Given:
Line Pressure ( P )
Size of damage ( D)
Duration of leak (t)

= 6 psi
= 19 mm or 1.9 cm
= 72 hrs

Formula used :
P = ƴh ;
V²=(2gh);
Q= AV
Vol= Qt
Computation:
P = ƴh ;

6 lb/in2

h=

62.43 lbs/ft3

h=
h=

1ft
12in

3

166.07 in
13.84 ft

V²=(2gh);

[

V²= 2(32.2ft/s²)(13.84ft)

]

V= 29.85 ft/s

A=

_πD²_
4

= π(1.9cm x in/2.54cm x 1ft/12in)²
4
A= 0.00305 ft²
Q= AV;
Q= 0.00305 ft² (29.85 ft/sec)
Q= 0.091 ft³/sec
Vol = Qt;
Vol = 0.091 ft³/sec (72 hrs x 3600 sec/hr)
= 23,587.20 ft³ x (1m/3.28 ft)³

Vol.= 668.43 m³

Location: Zone 6, Culianan, ZC.
27-Nov-15 to 04-Dec-15
Given:
Line Pressure ( P )
Size of damage ( D)
Duration of leak (t)

= 10 psi
= 100 mm or 10 cm
= 165 hrs

Formula used :
P = ƴh ;
V²=(2gh);
Q= AV
Vol= Qt
Computation:
P = ƴh ;

10 lb/in2

h=

62.43 lbs/ft3

h=
h=

1ft
12in

3

276.79 in
23.06 ft

V²=(2gh);

[

V²= 2(32.2ft/s²)(23.06ft)

]

V=38.54 ft/s

A=

_πD²_
4

= π(10cm x in/2.54cm x 1ft/12in)²
4
A= 0.0845 ft²
Q= AV;
Q= 0.0845 ft² (38.54 ft/sec)
Q= 3.26 ft³/sec
Vol = Qt;
Vol = 3.26 ft³/sec (165 hrs x 3600 sec/hr)
= 246,456 ft³ x (1m/3.28 ft)³

Vol.= 6,984.22 m³

1ft
12in

3

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