Civil Engineering - Irrigation - Discussion

Discussion Forum : Irrigation - Section 3 (Q.No. 47)
47.
Lacey's equation for calculating flood discharge in rivers, is
V = 10.8 R1/2 S1/2
V = 10.8 R2/3 S1/2
V = 10.8 R2/3 S1/3
V = 10.8 R1/3 S2/3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
15 comments Page 2 of 2.

Jeny said:   6 years ago
Yes, C is correct. I agree.

Asli said:   6 years ago
Yes, option C is correct.

Dhru said:   6 years ago
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.

Noor ahmad said:   3 years ago
Manning Eq: v = 1/n R2/3 S1/2.

Lacey Eq: v = 10.8 R2/3 S1/2.
(1)

Amit kumar said:   2 years ago
Option B is the correct answer.


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