Summary:

The paper presents the general characteristics of two hydrotechnical objects that have a key role in protecting the upper and middle part of Odra valley against the flood: existing since 2002 Buków polder and planned the Racibórz reservoir. This paper presents a study of flood wave reduction in May 2010, with using the Buków polder capacity and presents simulations of the potential impact the Racibórz reservoir in several scenarios on the assumption discharge of water from reservoir.
The results were referred to indications of the water gauge in Miedonia, giving a view of the percent reduction in the maximum state, and therefore the effectiveness of the flood protection system. They show clearly the importance of Racibórz reservoir as an integral and effective element to flood wave control on the upper Odra.