Scheme of evolution and modern lithomorphodynamics of the Beglitskaya Spit

The modern relief of the Beglitskaya Spit (Taganrog Bay of the Sea of Azov) was formed under conditions of large-scale technogenic deformations. The development of shell deposits in the post-war period and in the 1970s led to the destruction of the system of shafts that recorded the evolution of the accumulative body under natural conditions. A scheme has been proposed according to which a marine accumulative terrace was first formed along the bedrock coast, oriented to the northeast, in contrast to the adjacent section of the Beglitskaya terrace. It had a planned configuration close to an isosceles triangle. As it abutted the eastern flank of the dead slope, the loss of sediments moving along its seashore to the south increased. This is how a bending spit began to form, the coastal bank of which intercepted the products of destruction of loamy strata located within the area of the so-called Zolotaya Spit. Silt began to accumulate in the rear part of the coastal rampart. In the case of the Beglitskaya Spit, low-thickness shell-detritus sediments were deposited on top of the silts. The data characterizing some parameters of the modern litho-morphodynamics of the Beglitskaya Spit are presented. In storm conditions of 1936, 1954, 1969-1970, 1972, 1978 the spit was flooded. In April 1997, a surge covered the spit with a layer of water of 1.2-1.4 m for two days. In the above storm conditions and during the hurricanes of 2007 and 2014 erosion of the windward coast was observed.