Question

The criteria to classify a dam as a large dam is __________

(a) Length of the crest of the dam lesser than 500 m

(b) Capacity of the reservoir less than 1 million cubic meters

(c) Maximum flood discharge less than 2000 cubic meters/second

(d) Capacity of the reservoir not less than 1 million cubic meters

This question was addressed to me in a national level competition.

Query is from Types of Dams in section Dams and Reservoirs of Engineering Geology

Answer 1

The correct option is (d) Capacity of the reservoir not less than 1 million cubic meters

To elaborate: Following conditions are necessary to classify a dam as large dams: length of the crest of the dam not lesser than 500 m; capacity of the reservoir not less than 1 million cubic meters; maximum flood discharge not less than 2000 cubic meters/second.