Hydrographic and navigational analysis of Lower Oder shipping conditions – case study of the backflow occurrence

¹ Instytut Nawigacji Morskiej, Akademia Morska w Szczecinie, Wały Chrobrego 1-2, 70-500 Szczecin, Polska
² Centrum Naukowo – Badawcze Analizy Ryzyka Eksploatacji Statków, Akademia Morska w Szczecinie, Wały Chrobrego 1-2, 70-500 Szczecin, Polska

^* Corresponding author: p.medyna@am.szczecin.pl

Abstract

One of the significant limitations of inland waterway transport on the Oder River is the water level. Its variability determines the minimum clearance under the bridges and thus the maximum drought of moving vessels. An important factor affecting the water level in the Oder River is the phenomenon of wind backwater. Certain pressure field distribution situations may affect in an increase of water level on the coast and thereby block the outflow of river waters. In this paper an example of the limitations of inland navigation in the estuarine part of the Lower Oder under the weather conditions on the southern Baltic Sea in autumn 2016 is presented. For the analysis area of Szczecin Waterway Node and section of Oder River from Szczecin to Gryfino was chosen. Based on data the weather and navigational conditions of the area of the Lower Oder were assessed. Occurring winds, currents and changes in water level has been analyzed. In the situations of unfavorable raise of the water level in the river, inland navigation is redirected to the section of Regalica River, and a section of the port of Szczecin region is closed. This causes obvious difficulties and results in prolonged ships routes. Additional obstacle that take place here is an arbitrarily determined time of railway bridge span lifting in Szczecin Podjuchy.