Civil Engineering - Waste Water Engineering - Discussion
Discussion Forum : Waste Water Engineering - Section 1 (Q.No. 16)
16.
If the over land flow from the critical point to the drain is 8 km and the difference in level is 12.4 m, the inlet time is
Discussion:
29 comments Page 1 of 3.
Harish N said:
6 years ago
Kirpichs formula can also be used like this;
Tc= (0.00032L^0.77 )/S^0.385.
Tc= Time of concentration ( hr).
L= Maximum length of travel (m).
S= slope, H/L.
By using this formula we can get the correct answer, and km is converted into m.
Tc= (0.00032L^0.77 )/S^0.385.
Tc= Time of concentration ( hr).
L= Maximum length of travel (m).
S= slope, H/L.
By using this formula we can get the correct answer, and km is converted into m.
(1)
Jaysukh parmar said:
7 years ago
Here,
The potential Energy=m.g.h so, h=12.4 m. we can consider 1/2 *12.4=0.5,
0.5 m/sec under force of gravity run,
60*60=3600 sec*0.5 m/sec=1800 m.
1800/1000=1.8 km/hr.
Here 8 km/1.8 km/hr.
Ans. 4.44 hr. can say 4 hours.
The potential Energy=m.g.h so, h=12.4 m. we can consider 1/2 *12.4=0.5,
0.5 m/sec under force of gravity run,
60*60=3600 sec*0.5 m/sec=1800 m.
1800/1000=1.8 km/hr.
Here 8 km/1.8 km/hr.
Ans. 4.44 hr. can say 4 hours.
(1)
Abhi said:
9 years ago
Ti = [0.885 L^3/H]^0.385.
Where Ti = inlet time in hrs.
L = overland flow in KM.
L = 8KM.
H = 12.4m.
Therefore,
Ti = 3.999 say 4hrs.
Where Ti = inlet time in hrs.
L = overland flow in KM.
L = 8KM.
H = 12.4m.
Therefore,
Ti = 3.999 say 4hrs.
(4)
Ashish said:
7 years ago
It should be 3, here's why
Formula T = 0.0078 * L^.77 ÷ H^.385.
BY putting the value of L&H we can calculate,
The value of T,
T=2.99=3.
Formula T = 0.0078 * L^.77 ÷ H^.385.
BY putting the value of L&H we can calculate,
The value of T,
T=2.99=3.
Taibaimtiaz said:
7 years ago
@Jaysukh.
Are you comparing potential energy with kinertienergy? How come 1/2 fraction is there? please explain.
Are you comparing potential energy with kinertienergy? How come 1/2 fraction is there? please explain.
Anas said:
2 years ago
T = L^1.15/51 H^0.385.
L= 8km >>>>>=8000m,
H= 12.4 m.
By solving, we get T=229 min =4 hours.
L= 8km >>>>>=8000m,
H= 12.4 m.
By solving, we get T=229 min =4 hours.
(1)
Jaysukh parmar said:
7 years ago
We can consider break up- 1/2*12.4= 6.2, standard water velocity is 3 m/sec so that 6/3 =0.5 m/sec.
Adhi said:
9 years ago
Can you please tell me, Wher does you got that formula? @Abhi.
R.P said:
7 years ago
@Adhi.
That is Kirpich's formula, you will use in hydrology.
That is Kirpich's formula, you will use in hydrology.
Priya said:
7 years ago
Why L in km and h in m? Please explain.
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