Which is a pipe used to draw down an impoundment by running up from the impounded water and then down the downstream channel?

Question

Quizplus · Accepted Answer

A siphon is the only option listed that fits the description of running up from the impounded water and then down the downstream channel. Choice A, a rectangular weir, is a type of dam that is perpendicular to the flow of water and controls the release of water from a reservoir. Choice B, a sluice gate, is a gate or valve that controls water flow through a channel or pipe, but does not necessarily involve drawing down an impoundment. Choice D, an ogee weir, is a type of dam or spillway that is curved and regulates water flow over the structure.

Which Is a Pipe Used to Draw Down an Impoundment