In relation to climate change, the number of floods and dry days is increasing. From ancient history
man has built water reservoirs in order to protect himself from floods and drought. In last decades
these structures have gained on importance especially because of their multifunctional nature which
has significantly influenced, not just flood control, but also economic development of the society.
Placing of such structures into environment must be carefully studied with an aim to preserve natural
environment and reduce their environmental effects as much as possible. Very important part of
designing a dam is arrangement and hydraulic design of outlet works. Safety of a dam and its
hydraulic characteristics depend on design of outlet works. Different outlet works arrangements are
described in this thesis as well as their hydraulic properties. In the last part of the thesis, hydraulic
analysis of the outlet of Drtijščica dam is performed.