Author(s): Natalia Garcia Estevez; Miroslav Tomin; Karim Kam; Zoran Rasic; Lidija Andrijasevic – Jovanovic; Djordje Visic; Ivan Mitrovic

Linked Author(s): Natalia Garcia Estevez, Karim Kam

Keywords: Danube-Serbia; Traininng-works; Morphodynamic; Riverbanks erosion

Abstract: The purpose of the Project is improvement of navigation conditions on the Danube River in accordance with the national policy and strategy provisions and with respect to the Danube Commission Recommendations and EU transport system development plans in order to ensure fast, safe, reliable and environmentally friendly transportation, smooth flow and mobility of people. The Scope of this Project (designed in 2012) was to execute several river training structures (one groyne, four bottom sills and three chevrons) and dredging works (close to 500.000 m3) at six (6) critical sectors along the Danube River in Serbia, from km 1200+000 to km 1285+000. Due to morphological changes, river training structures has finally consisted of one detached groyne, four bottom sills and two chevrons executed in three critical sectors and dredging works (more than 530.000 m3). Dredging works have been executed at three critical sectors. Main Beneficiary of the works is the Ministry of Construction, Transport and Infrastructures and End Recipient, Directorate for Inland Waterways. Works are cofounding by EU (85%) and Ministry of Finances - Republic of Serbia (15%). Value of the TA: 1,703,500.00 €. Value of the Works: 7,613,554.78 €. ACCIONA Ingeniería has provided the Technical Assistance Services during the construction and implementation of the river training and dredging works, covering two components: Supervision of the Works and Environmental monitoring. Works have being executed by GROMA HOLD LTD (Bulgaria), in consortium with Water Management Business Company Regulacije, LLC (Republic of Serbia) and Company for Design Engineering and Construction Kolubara DOO (Republic of Serbia). This paper shows the situation in critical sectors Futog, Čortanovci and Preliv one year after the finalization of works, regarding the structure behavior and hydromorphological status of the river stretches. In all the structures, (groynes, chrevons and sills) deviations of the body are beyond allowable limits without negative impacts on it. The riverbanks close to the structures have been stabilized. Although sand bars continue appearance and growing, they are not affecting the fairway as in past. Several bathymetric surveys have been carried out, before, during and after works, with the purpose of verify how the riverbed has been modified due to the presence of the new training structures and/or the dredging activities in each critical sectors. The hydromorphology of each sector has been analyzed comparing the initial situation in 2012, when the project was designed with the zero-status prior the works in 2017, during the construction period (2017-2020) and one year after the finalization in each sector (2021) . This has been the first time that this type of works are developed in the Danube River in Serbia. The lessons learned from this project could be a good initial point for future projects in this river.

DOI: https://doi.org/10.3850/IAHR-39WC252171192022835

Year: 2022