At the beginning of the graduation thesis, there is a short presentation of the Savinja River basin and its basic hydrographic characteristics. Further, flood problematics of the Savinja River basin is presented. The Lower Savinja Valley is one of the areas in Slovenia with the highest flood risks. Due to the torrential character, high waters of the Savinja River and its tributaries have extremely high flow rates and destructive power. People have always been struggling with the restless and unpredictable river and tried to subdue it. Restraining of the high waters in the flooding areas is anticipated in order to reduce the vulnerability of the populated areas. Further in the thesis, we analysed the role and operation of the dry retentions and we performed the volume analysis of the dry retentions, which are planned in the lower Savinja River Valley in order to control the flood waters with a 100-year return period. Additionally, an analysis of the volumes of the flood waters, which flooded the section of the Savinja River where regulation of the dry retention is anticipated during the previous flooding events, has been made. At the end, the and-use types in the areas where the dry retentions are anticipated in the Lower Savinja Valley are presented. In these areas, the use of the existing mainly agricultural areas will mostly likely have to be changed.