Civil Engineering - Irrigation - Discussion

47. 

Lacey's equation for calculating flood discharge in rivers, is

[A]. V = 10.8 R1/2 S1/2
[B]. V = 10.8 R2/3 S1/2
[C]. V = 10.8 R2/3 S1/3
[D]. V = 10.8 R1/3 S2/3

Answer: Option C

Explanation:

No answer description available for this question.

Paras said: (Mar 26, 2017)  
I think, option B is correct.

Sneha said: (Mar 28, 2017)  
Option B is right. I agree @Paras.

Faisal said: (Jul 16, 2017)  
Yes, B is right.

Jgj said: (Aug 18, 2017)  
Option B IS RIGHT.

Prashant Mishra said: (Oct 3, 2017)  
Option B is correct.

Nitesh Saini said: (Jan 12, 2018)  
Given option is correct don't get confused by s^1/2. Actually, it is used in manning equation in fluid mechanics and quid different from irrigation.

Given option is correct. C.

Ankit Mishra said: (Jan 22, 2018)  
C is the correct option.

Bhagwat said: (May 7, 2018)  
C is correct. I agree with the given answer.

Akshay said: (Jun 19, 2018)  
Option C is correct. I agree with the given answer.

Bipin said: (Dec 6, 2018)  
C is the correct option. I agree with the given answer.

Jeny said: (Apr 19, 2019)  
Yes, C is correct. I agree.

Asli said: (Sep 4, 2019)  
Yes, option C is correct.

Dhru said: (Nov 15, 2019)  
The three fundamental equations are:

V = 0.639 √fR

Where V is regime velocity in m/sec.

Af2 = 141.2 V5(2)

V = 10.8 R2/3 S1/3 ..(3)

Where S is the slope of water surface.

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