Question

Topography dictates the first choice of the type of dam. A narrow U-shaped valley would suggest a ________________________

(a) concrete overflow dam

(b) spillway

(c) arch dam

(d) earth dam

I had been asked this question at a job interview.

I'm obligated to ask this question of Factors Governing the Selection of a Particular Type of Dam in portion General and Particular Dams of Irrigation Engineering

Answer 1

Correct choice is (a) concrete overflow dam

For explanation I would say: Since the topography of the dam site is the first criterion of the selection process. For deep gorges, a concrete dam is an obvious choice whereas an embankment dam with a separate spillway is generally preferred for

broad valleys in plains.