PECULIARITIES OF DYNAMICS OF THERMOABRASIONAL COASTS OF THE BAYDARATSKAYA BAY (KARA SEA) TODAY

N. V. KOPA-OVDIENKO; S. A. OGORODOV

doi:10.15356/0435-4281-2016-3-12-21

PECULIARITIES OF DYNAMICS OF THERMOABRASIONAL COASTS OF THE BAYDARATSKAYA BAY (KARA SEA) TODAY

N. V. KOPA-OVDIENKO, S. A. OGORODOV

https://doi.org/10.15356/0435-4281-2016-3-12-21

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Abstract

The article is dedicated to the peculiarities of the dynamics of thermoabrasional coasts of the Kara Sea in the area of the gas main pipeline “Bovanenkovo-Ukhta” crossing of the Baydaratskaya Bay. The coasts in Yamal and Ural key sites differ signifi cantly both in wind wave conditions and in criolithologic structure. The study was based on the results of the coastal retreat fi eld monitoring, carried on since 1988. Spatial and temporal variability of the thermoabrasional coasts dynamics have been estimated. The effect of wind-wave and thermal factors on the temporal variability of the coastal dynamics has been determined. We have found out that average coastal retreat rates in natural conditions vary from 0.3 and 1.2 m/year at the Yamal key site and from 0.5 to 2.4 m/year at the Ural key site. Spatial variability of coastal retreat rates in the Baydaratskaya Bay is determined by the geomorphological structure of the shore. It is more considerable in the Ural key site than in the Yamal key site because of more complex geocryological structure and the presence of ground ice bodies. Temporal variability of coastal retreat rates of the Baydaratskaya Bay in natural conditions is mainly determined by the wind-wave factor at the Yamal key site and by the combination of wind-wave and thermal factors at the Ural key site. It is better expressed at the Ural key site than at the Yamal key site, along with spatial variability. In 2009–2012, the main factor determining the coastal dynamics at both Yamal and Ural coasts was the technogenic factor.

Keywords

Baydaratskaya Bay, coast dynamics, thermoabrasion, wind energy, thermal requirements, technogenic factor

About the Authors

N. V. KOPA-OVDIENKO

N.N. Zubov State Oceanographic Institute
Russian Federation
Moscow

S. A. OGORODOV

Lomonosov Moscow State University, Faculty of Geography
Russian Federation
Moscow

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For citations:

KOPA-OVDIENKO N.V., OGORODOV S.A. PECULIARITIES OF DYNAMICS OF THERMOABRASIONAL COASTS OF THE BAYDARATSKAYA BAY (KARA SEA) TODAY. Geomorfologiya. 2016;(3):12-21. (In Russ.) https://doi.org/10.15356/0435-4281-2016-3-12-21