A hydraulic drop is a type of local phenomena found in
open channel flow
In fluid mechanics and hydraulics, open-channel flow is a type of liquid flow within a conduit with a free surface, known as a channel. The other type of flow within a conduit is pipe flow. These two types of flow are similar in many ways but di ...
. It is a rapid change in the depth of flow from a high stage to a low stage that results in a steep depression in the water surface. It is often caused by an abrupt change in the
channel slope.
Another type of local phenomena found in an open channel flow is the
hydraulic jump
A hydraulic jump is a phenomenon in the science of hydraulics which is frequently observed in open channel flow such as rivers and spillways. When liquid at high velocity discharges into a zone of lower velocity, a rather abrupt rise occurs in ...
.
References
Chow, V. T. (2008). Open-channel hydraulics. Caldwell, New Jersey: Blackburn Press.
Hydraulics