K. I. Gurov
Marine Hydrophysical Institute of RAS, Sevastopol, Russia
Abstract
Using data obtained during the complex monitoring in a coastal zone of the West Crimea the sediment granulometric composition near water edge and on beach of the Kalamitsky Bay is investigated. Point sampling of sediments from the beach surface and the underwater coastal slope was carried out on the different types of shores of the Kalamitsky Bay, located from the beach "Zolotyye peski" (Yevpatoriya) in the north to the Alma River mouth (Peschanoe village) in the south. Observation data showed that the largest fractions are concentrated nearshore and mainly represented by the medium and fine gravel material with an admixture of fine-grained sand and pebbles. Samples selected near shoreline were characterized by varying degrees of sorting coefficient from 1.25 to 2.6. It is noted that the material is most well sorted in the central beaches near the Sasyk Lake (1.67) and near the Alma River mouth (1.25). On the most part of the investigated coast, the beach deposits are represented by sand of different sizes. The fraction 0.5 – 0.25 mm predominates with inclusions of coarse-grained and fine-grained sand. On average, the beach sediment is characterized by a good degree of grading (So = 1.44). The content of aleuritic and pelitic material in the beach sediments of the investigated Western Crimea coast does not exceed 0.6 %. It is shown that the features of sand and gravel differentiation on the beach and nearshore band of underwater coast slope are determined by location of incoming source material, the hydrotechnical constructions placing and the direction of longshore movement of sediment.
Keywords
coastal zone, monitoring, beach sediments, granulometric composition, the Kalamitskiy Bay
DOI
10.22449/2413-5577-2018-3-56-63