A barrier constructed across a valley for impounding water or creating a reservoir
Any artificial barrier which impounds or diverts water The dam is generally hydrologically significant if it is: 1 25 feet or more in height from the natural bed of the stream and has a storage of at least 15 acre-feet 2 Or has an impounding capacity of 50 acre-feet or more and is at least six feet above the natural bed of the stream
a man-made barrier built to hold back or control flowing water in a river or lake
female parent of an animal especially domestic livestock a barrier constructed to contain the flow of water or to keep out the sea obstruct with, or as if with, a dam; "dam the gorges of the Yangtse River
A structure of earth, rock concrete, or other materials designated to retain water, creating a pond, lake, or reservoir
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To dam a river means to build a dam across it. plans to dam the nearby Delaware River. Danish biochemist. He shared a 1943 Nobel Prize for the discovery of vitamin K. decameter. Barrier built across a stream, river, or estuary to conserve water for such uses as human consumption, irrigation, flood control, and electric-power generation. The earliest recorded dam is believed to be a masonry structure 49 ft (15 m) high built across the Nile River in Egypt 2900 BC. Modern dams are generally built of earth fill, rock fill, masonry, or monolithic concrete. Earth-fill (or embankment) dams, such as Egypt's Aswan High Dam, are usually used across broad rivers to retain water. The profile of an earth-fill dam is a broad-based triangle. Concrete dams may take various forms. The gravity dam uses its own dead weight to resist the horizontal force of the water. Concrete-buttress dams reduce material in the wall itself by using support buttresses around the outside base. An arch dam, such as Hoover Dam, is built in a convex arch facing the reservoir, and owes its strength essentially to its shape, which is particularly efficient in transferring hydraulic forces to supports. Aswan High Dam Hoover Dam Boulder Dam Three Gorges Dam Project
A dam is a wall that is built across a river in order to stop the water flowing and to make a lake. plans to build a dam on the Danube River
An artificial barrier or wall constructed across a watercourse or valley for one or more of the following purposes: creating a pond or lake for the storage of water; diverting water from a watercourse into a conduit or channel; creating a hydraulic head that can be used to generate power; improving river navigability; controlling floods; or retention of debris It may be constructed of wood, earth materials, rocks, or solid masonry (Bates and Jackson 1980)
A barrier built across a watercourse to impound or divert water A barrier that obstructs, directs, retards, or stores the flow of water Usually built across a stream A structure built to hold back a flow of water Horsetooth Reservoir has four dams: Spring, Dixon and Soldier Canyon Dams and Horsetooth Dam
a structure of earth, rock, or concrete designed to form a basin and hold water back to make a pond, lake, or reservoir