Page 214 - Water Engineering Hydraulics, Distribution and Treatment

192
ft
ft
−0.03 b
=−0.03
−0.03 b
=−0.03
25.0
25.3
+0.03
+0.03
+0.03
+0.03
+0.03
+0.03
+0.03
+0.03
(14)
q 1
A–E
5,
5,
head
2,
4,
−2.3 ÷ (40.2 × 1.85)
−6.7 ÷ (104.9 × 1.85)
(23)
1,
3,
pipes
pipes
of
Loss
12.8
26.5
35.6
30.0
5.0
(13)
10.0
12.4
12.8
Via
Via
correction
2.
1.
Result
+6.8
+6.1
H 3
(22)
+6.4
+6.0
(ft)
+9.8
+4.6
−12.9
−9.8
−8.2
−4.6
(12)
First Chapter 6 (MGD) H 1 /Q 1 (ft) Water Distribution Systems: Components, Design, and Operation ft 25.5 7, 6, 3, pipes Via 3. −8.9 −4.6 −0.3 +4.6 +11.8 −10.8 −5.8 −0.2
H 1
pipe (ft).
s 1 (‰) (11) 3.0 6.1 9.8 2.3 2.3 9.8 12.9 4.1 s 3 (‰) (21) 3.2 6.8 8.9 2.3 2.6 11.8 10.8 2.9
Q 1 (MGD) (10) +1.21 +0.61 −0.79 −0.36 +0.36 +0.37 −0.43 −0.23 Q 3 (MGD) (20) +1.25 +0.65 −0.75 −0.36 +0.36 +0.41 −0.39 −0.19 formula for C = 100, H = head lost in
q 0 (MGD) (9) +0.21 +0.21 +0.21 +0.21 −0.07 b =−0.21 +0.07 −0.21 b +0.07 +0.07 +0.07 =−0.07 q 2 (MGD) (19) +0.01 +0.01 −0.01 −0.01 −0.01 b =−0.01 +0.01 −0.01 b +0.01 −0.01 −0.01 =−0.01
method H 0 /Q 0 (8) 4.2 7.0 15.1 16.8 16.8 22.0 33.8 44.0 H 2 /Q 2 (18) 5.0 10.3 12.0 12.8 12.8 28.2 28.2 31.0
heads conditions ÷ (43.1 × 1.85) ÷ (116.6 × 1.85) correction −0.9 ÷ (40.1 × 1.85) −1.6 ÷ (100.2 × 1.85) the companion circuit; they are of opposite sign.
balancing H 0 (ft) (7) +4.2 +2.8 −15.1 −8.4 −16.5 +8.4 +6.6 −16.9 −13.2 −15.1 H 2 (ft) (17) +6.2 +6.6 −9.1 −4.6 +4.6 +11.3 −11.3 −6.2 ft per 1000 (‰) by the Hazen–Williams + q 2 . Q 2
the Assumed Second =
using s 0 (‰) (6) 2.1 2.8 15.1 4.2 4.2 6.6 16.9 6.6 s 2 (‰) (16) 3.1 6.6 9.1 2.3 2.3 11.3 11.3 3.1 + q 1 ; Q 3
6.3) loss in Q 1 = MGD = 3.785 MLD.
(Example Q 0 (MGD) (5) +1.0 +0.4 −1.0 −0.5 +0.5 +0.3 −0.5 −0.3 Q 2 (MGD) (15) +1.24 +0.64 −0.76 −0.36 +0.36 +0.40 −0.40 −0.20 + q 0 ; Q 2 of this pipe. for the same pipe in
6.12 Q 0 = = 25.4 mm; 1
Fig. Diameter (in.) (4) 12 8 8 8 8 6 6 6 Diameter (in.) (4) 12 8 8 8 8 6 6 6 consideration
of ∑ H 1.85 ∑ (H∕Q) , Q 1
network MGD; s = slope of hydraulic gradient or friction =
the Length (ft) (3) 2,000 1,000 1,000 2,000 2,000 1,000 1,000 2,000 Length (ft) (3) 2,000 1,000 1,000 2,000 2,000 1,000 1,000 2,000 factors: 1 ft = 0.3048 m; 1 in.
of Network Network in MGD; q b Corrections in this column are those calculated
Analysis Pipe no. (2) 1 2 3 4 a 4 c 5 6 7 Pipe no. (2) 1 2 3 4 a 4 c 5 6 7 a Pipe serves more than one circuit; first consideration of this pipe.
6.4 flow correction
Table Circuit no. (1) I II Circuit no. (1) I II Q = flow in = q Conversion c Second