Question

What is the value of horizontal destabilizing force caused by the formation of waves in a storage reservoir having a fetch of 52 km due to high wind of 172 km/h?

(a) 30 KN

(b) 60 KN

(c) 130 KN

(d) 180 KN

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I'm obligated to ask this question of Gravity Dam Design in division Gravity Dam Design and Construction of Irrigation Engineering

Answer 1

The correct answer is (d) 180 KN

Explanation: When F > 32 km, the wave height is given by hw = 0.032 (V.F)^1/2

hw = 0.032 (172 x 52)^1/2 = 3.02 m

The force caused by waves is given by the equation – Pw = 19.62 hw^2 KN/m run of the dam

Pw = 19.62 x 3.02^2 = 179.69 KN.