10.24411/1728-323X-2018-16059

Geoecology

COASTAL EROSION MONITORING AT THE BOVANENKOVO-UKHTA GAS PIPELINE LANDFALL, THE WESTERN YAMAL, THE KARA SEA COAST

1. N. G. Belova, Ph. D. (Geography), Faculty of Geography, Lomonosov Moscow State University, This email address is being protected from spambots. You need JavaScript enabled to view it.,
2. S.A. Ogorodov, Ph. D. (Geography), Dr. Habil, professor RAS, Faculty of Geography, Lomonosov Moscow State University, This email address is being protected from spambots. You need JavaScript enabled to view it.,
3. O.S. Shilova, Ph. D. (Geography), Faculty of Geography, Lomonosov Moscow State University, This email address is being protected from spambots. You need JavaScript enabled to view it.,
4. A. V. Novikova, Faculty of Geography, Lomonosov Moscow State University, This email address is being protected from spambots. You need JavaScript enabled to view it.,
5. M. Aleksyutina, Ph. D. (Geology), Faculty of Geography, Lomonosov Moscow State University, This email address is being protected from spambots. You need JavaScript enabled to view it.

The coasts of the Baydaratskaya Bay are composed by frozen sediments. At the Yamal Peninsula, coastal dynamics monitoring is carried out by the laboratory of geoecology of the North of Moscow State University at the offshore gas pipeline crossing the site since the late 1980s. The average long-term retreat rate of the coastal bluffs is 0.4 m/year, according to the results of field monitoring combined with remote sensing methods. The erosion rate at the sites with similar topography andpermafrost conditions varies from year to year, depending on hydro-meteorological parameters such as frequency and intensity of storms, the duration of the ice-free period, the sum of annual positive air temperatures. After the start of the construction of the offshore gas pipelines across the Baydaratskaya Bay in 2007, technogenic disturbances significantly changed temperature and lithodynamic regimes of the coastal zone. On land, the degradation of vegetation cover as a result of the passage of heavy vehicles caused the activation of thermoerosion processes and deflation. The excavation of sandy material at beaches and barriers has led to a change of the cross profile of the coastal zone, the stability of the coasts to erosion has decreased. These changes took place under the conditions of climate warming and decrease of ice cover, which led to the growth of thermal and wave impact on coastal systems.

permafrost coasts, arctic coastal dynamics, monitoring.

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