ABSTRACT
Bottom outlet works within hydraulic schemes with a reservoir are constructed in order to ensure conveyance of water from the reservoir into the lower part, downstream of the dam, in order to facilitate lowering of the level of the reservoir, or else to ensure water for the biological minimum flow in the riverbed, downstream of the works. In cases of small dams and reservoirs, the bottom outlet structures often also serve for intake of water for some user as well, most often for irrigation. As has been said in the general part, in Chapter 23, an outlet structure is also called a bottom outlet, owing to the fact that the intake of water is constructed at a low level, close to the foundation of the dam. In Chapter 23, there have been set out the basic issues regarding outlet structures, including the question of design water.
