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2 TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2 2021

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Ships’ routes to Polish Ports of the Gulf of Gdańsk

Wawruch R.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2021

Vol. 15 No. 3

583--590

The paper discusses ships’ routes to Polish ports in the Gulf of Gdańsk determined on the basis of data obtained from the Baltic Ship Monitoring System by means of AIS coast stations and defined by the Baltic Sea Hydrographic Commission (BSHC). The measures to regulate maritime traffic implemented by the Polish maritime administration in order to reduce the identified risk of groundings and ship collisions are presented, as well as the author's opinion on their effectiveness.

Impact of hydrotechnical structures on forming the tombolo oceanographic phenomenon in Kołobrzeg and Sopot

Specht C., Lewicka O., Specht M., Zblewski S.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2021

Vol. 15 No. 3

687--694

The process of global sea level rise is causing several significant changes in the coastal zone. Sea level rise and the frequency, strength and duration of storms are also occurring on the Polish coast. As a result, coastal protection measures, such as man-made engineering structure, are necessary. These engineering structures affect (among others) the marine ecosystem in different ways. Although the presence of such engineering structures can cause changes in the bathymetry of waterbody and the transport of sediments along the basin, it also slows down the erosion of the shoreline. For this reason, comprehensive knowledge of natural conditions, including dynamic and variable factors, is essential in the construction of a hydro-engineering structures. The correct determination of the environmental conditions helps to minimize environmental damage. Prior to interventions on the coast, the issues addressed in the paper should be analysed and studied. In this paper, the influence of shoreline structures on the main factors responsible for the development of tombolo phenomenon is discussed. In addition, the lithological diversity of surface sediments on which the rate of coastal erosion depends, is also discussed. An important element of the work is the descriptions of tombolo in Poland. They contain information on the causes of the phenomenon, as well as about the negative consequences of a disturbance of the hydrodynamic dynamics caused by the structure.