NEW DATA ON THE STRUCTURE OF THE BEGLITSKAYA SPIT

In order to study the mechanisms and factors of the formation and transformation of the Sea of Azov spits, as well as to develop tools and approaches to create forecasts for the further development of its coastal zone due to changes in the level regime and climate, in the summer of 2022, the staff of the Southern Scientific Centre of the Russian Academy of Sciences conducted field studies on the northern coast of the Taganrog Bay. On the Beglitskaya Spit area and the adjacent section of the Sea of Azov water area, wells were drilled with core sampling, and the study of soil cover, long-shore currents and the thermohaline structure of coastal waters was carried out. According to the results of drilling 9 wells with a depth of 5.5 to 9.8 m, geological sections were studied in the lower parts of which limestone shells of the middle Sarmatian are deposited. Field studies of the soil cover of the Beglitskaya Spit confirm the development of negative dehumification processes characteristic of the Azov natural and agricultural zone of the Rostov Region, which includes the coast of the Taganrog Bay. The composition of the sediments of the coastal ramparts of the Beglitskaya Spit is explained by differences in the lithodynamic conditions of transportation of sedimentary material. New data of high-precision measurement of elevation marks of the relief surface along the longitudinal profile laid from the base to the distal section of the spit are presented. New data on temperature, salinity, and current velocities of coastal waters are analyzed. Observations carried out at hydrological stations made it possible to build a hypothetical scheme of the modern lithodynamics of the Beglitskaya Spit.

Taganrog Bay, Beglitskaya Spit, sea level, thermohaline structure of the sea, coastal currents, coastal sediments, soil cover, wells, lagoon, coastal ramparts