In Russian
geomorphology, a
peresyp (пересыпь), also known as a
bay-mouth bar is a narrow
sandbar that rises above the water level (like a spit) and separates a liman or a
lagoon from the sea. Unlike
tombolo bars, a
peresyp seldom forms a contiguous strip and usually has one or several channels (called
girlo (гирло) in Russian) that connect the liman and the sea.
[ Федченко Г.П, 'О самосадочной соли и соляных озерах Каспийского и Азовского бассейнов 1870, p. 54][ ПЕРЕСЫПЬ, Great Soviet Encyclopedia''] The noun is derived from the verb пересыпать, "sprinkle over".
Similarly to spits, peresyps are formed by actions of surf zone currents from sand, gravel/pebbles, and crushed shells as a result of longitudinal (longshore drift) or transverse transport of sediment.[ Sometimes a peresyp may be formed when two spits on the two sides of a liman grow and eventually meet.][, Геологія.Общій курсъ, 1914. p.91]
Both limans and peresyps can be maritime (the peresyp bar is created by the currents of a sea) or fluvial (the peresyp bar is created by the slowed or turned flow of a sediment-saturated river).[ Mihai Ielenicz (ed., 1999): Dicționar de geografie fizică, Corint publ., Bucharest, 1999 ; Grigore Antipa (1941) : Marea Neagră, Romanian academy press, Bucharest, 1941, pp. 55-64, and Petre Gâștescu, Vasile Sencu (1968) : Împărăția limanelor, Meridiane publ., Bucharest.]
Sometimes the sediments close the channels in a peresyp and sometimes the water washes them through again. Even when there are no channels, the water can still seep through or spill over the peresyp. The sea water evaporates within the closed liman, thus increasing its salinity. In this way, converting from limans, a number of in Crimea were formed.[
]
A number of geographical locations are called "peresyp", most notable being the of Odesa built on the wide peresyp that bars the Khadzhibey and Kuialnyk Estuary limans from the Black Sea. Other locations include the spit, by Tylihul Estuary, Ukraine
Peresyps have poor but peculiar flora and fauna.[ ИЗУЧЕНИЕ БИОРАЗНООБРАЗИЯ ПОДТВЕРЖДАЕТ ВЫСОКУЮ ПРИРОДООХРАННУЮ ЦЕННОСТЬ УРОЧИЩА ВИТЯЗЕВСКАЯ ПЕРЕСЫПЬ В ГРАНИЦАХ ПРИРОДНОГО ПАРКА «АНАПСКАЯ ПЕРЕСЫПЬ»]
See also
