The project is located in the Republic of Croatia, Karlovac County, administrative area of the city of Ogulin. The aim of the project is to reduce flood risk, i.e. to improve the flood protection system of the city of Ogulin. In its current state, the city of Ogulin is exposed to frequent flood events due to the large waters of the river Gornja Dobra. This project will increase the level of security of the city of Ogulin from flood events. This is planned to be implemented through: 1) Construction of retention-retention building Ogulin 2) Cleaning measures of Đula's sink 3) Preparation of study and project documentation for the project "Flood Protection of the City of Ogulin 2"