The experience of studying the dynamics of the coastal zone of Peter the Great Bay (Sea of Japan) on the position of coastal fortification objects

Abstract

In this paper we present the results of studying the dynamics of the coast of the Peter the Great Bay by comparing modem distances from the coastline to coastal fortification objects - bunkers and ARPK - with distances at the time of construction in 1941. It is found that this distance mainly reduced over time by 2-15 meters or more. Conclusions: Coastline in the Peter the Great Bay experiences preemptive destruction. Rate of destruction for the shore composed of crystal rocks may amount to 1-5 m, for the sediment shore - up to 15-20 meters in 100 years. Destruction of the coast with such a high rate is a threat to infrastructure and requires regular monitoring.