0 an area of very rough water caused by a raised area in the ground under the water, or by the meeting of two currents (= movements of water in a particular direction): --
In that formulation flow over the free overfall illustrated in figure 2 was considered.
The central portion is an overfall spillway.
The dam's overfall spillway has five radial gates with a combined maximum discharge of 141,000 cuft/s.
The dam's overfall spillway has five radial gates with a combined maximum discharge of 137,000 cuft/s.
The masonry has a maximum height of 82 feet above rock and the overfall at the spillway is 61 feet.
Until 2011, the major outflow from the pond was an overfall in the extreme southern corner of the pond.
The dam is 1376 ft in length, with a centered overfall area.
There is a granite-lined overfall area 100 ft long, which was originally topped by flashboards.
