Современная динамика берега Черного моря в районе мыса Бурнас

Аннотация

Stationary observations of the coastal zone morphology and dynamics are carried out on 11 sites near the Cape of Burnas (the Black Sea). Both erosional and built-up landforms above and below sea level had been surveyed each year since 1967 to 1989. The data thus obtained, together with older topographic maps (dated to 1863 and later) permitted to determine that the clayey cliff retreated 1.6 to 3.1 m per year. Similar rate show a nearby sandy and Shelly beach-barriers of the Burnas and Budaky limens. In particular year the cliff edge may collapse and retreat by 18-19 m. Maximum rate of retreat averaged over the whole redion is 7.35 m per year. The recent dynamics of the coastal zone is appraised by means of a dynamic coefficient, where it exceeds 1 the shoreline is stable and the beach accretion takes place. The sediments characteristics within the studied sector of the coast indicate the prevailing longshore drift towards south-west.