Provision of horizontal berms at suitable vertical intervals may be provided in the downstream face of an earthen dam in order to _________________
(a) allow the movement of cattle
(b) allow the inspection of vehicles to move
(c) reduce the erosion caused by the flowing rainwater
(d) increase the erosion
This question was addressed to me in an interview for internship.
This is a very interesting question from Design Criteria of Earth Dams topic in chapter Earthen and Rock Fill Dams of Irrigation Engineering