This project aims to prevent the occurrence of flood risk especially after the catastrophic fires that destroyed the forest wealth of the area in August 2021 and the disappearance of the plane tree forest due to the disease of the metachromatic ulcer of the plane tree The areas of the projects that will be constructed the city of Mantoudi of the municipality of Mantoudi of Lake Agia Anna of the Regional Unit of Evia of the Region of Central Greece The catastrophic fire that affected B Euboea and specifically the Municipality of Mantoudi of Lake Agia Anna in combination with the disease that destroyed the plane tree forest of the riparian zone of the river Kerea caused the need to find solutions to reduce flooding phenomena as well as the suspension of its overflow as well as the need to find a solution to prevent flooding of torrents, i.e. the smaller seasonal flow streams that have developed in the wider area around the city of Mantoudi with The need to find solutions to the above problems continuously increasing in intensity was recently confirmed by floods Daniel0408092023Elias2528092023 The proposed projects to address flood problems include rectangular tile-covered pipes of reinforced concrete tubular pipes are made of prefabricated cement pipes with a rubber waterproofing ring according to ELOT EN 6811 with nominal diameters and the corresponding lengths D 400mmL1545m D 600mmL98657m D 800mmL174359m D 1000mmL121131m D 1200mmL68671m flood-proof walls at the edge of the settlement technically overflowing