Orographic factor in the generation of along-slope currents in the south-eastern part of the Baltic Sea
Abstract
Influence of morphological features of the underwater coastal slope relief on the generation of storminduced high-energy bottom gravity currents is discussed. Such currents are capable of transporting beach sediments from the swash zone to the outer boundary of the coastal zone. Characteristic features of the regions (orientation of relief forms, gradients of the underwater coastal slope etc.) with positive and negative forms of relief oriented across the coast were identified and investigated by example of the underwater coastal slope of the Sambian Peninsula (Kaliningrad Oblast, south-eastern part of the Baltic Sea). Raster image processing methods were applied to the digital elevation model, and potential steepest descend trajectories of beach sediments were calculated. It is shown that the orographic factor is characteristic of several areas of the underwater coastal slope of the Sambian Peninsula, namely the Svetlogorsk Bay (from the Cape Taran to Pionersky) and the area from the Cape Gvardeisky to Zelenogradsk town at the northern coast, and the area from Yantarny settlement to Donskoe settlement at the western coast. In these areas the slope of the bottom can reach 2° value. These morphological peculiarities of the coastal zone affect the sediment balance, contributing to the transport of suspended matter to greater depths, and causing the degradation and erosion of beaches.
About the Authors
A. V. Kileso
Immanuel Kant Baltic Federal University
Russian Federation
Institute of Environmental Management, Urban Development and Spatial Planning, Department of Geography of the Ocean, Senior Lecturer
Russian Federation
Institute of Environmental Management, Urban Development and Spatial Planning, Department of Geography of the Ocean, Senior Lecturer
A. N. Demidov
Lomonosov Moscow State University
Russian Federation
Faculty of Geography, Department of Oceanology, Senior Scientific Researcher, PhD. in Geography
Russian Federation
Faculty of Geography, Department of Oceanology, Senior Scientific Researcher, PhD. in Geography
V. A. Gritsenko
Immanuel Kant Baltic Federal University
Russian Federation
Institute of Environmental Management, Urban Development and Spatial Planning, Department of Geography of the Ocean, Head of department, Professor, D.Sc. in Physics and Mathematics
Russian Federation
Institute of Environmental Management, Urban Development and Spatial Planning, Department of Geography of the Ocean, Head of department, Professor, D.Sc. in Physics and Mathematics
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Review
For citations:
Kileso A.V., Demidov A.N., Gritsenko V.A. Orographic factor in the generation of along-slope currents in the south-eastern part of the Baltic Sea. Vestnik Moskovskogo universiteta. Seriya 5, Geografiya. 2020;(3):100-107. (In Russ.)
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