Geology, geography and global energy

Scientific and Technical Journal

Conversion storm of relief bottom of Blue Bay after disastrous floods in the north-east of the Black Sea

2014. №2, pp. 150-162

Yevsyukov Yuriy D. - C.Sc. in Geography, Leading research assistant, Southern Branch of P. P. Shirshov Institute of Oceanology, Russian Academy of Sciences, 1g Prostornaya st., Gelendzhik, Krasnodar region, 353467, Russian Federation, evsgeol@rambler.ru

Rudnev Valeriy I. - Younger Research Assistant, Southern Branch of P. P. Shirshov Institute of Oceanology, Russian Academy of Sciences, 1g Prostornaya st., Gelendzhik, Krasnodar region, 353467, Russian Federation, evsgeol@rambler.ru

Kuklev Sergey B. - C.Sc. in Geography, Head of Laboratory, Southern Branch of P. P. Shirshov Institute of Oceanology, Russian Academy of Sciences, 1g Prostornaya st., Gelendzhik, Krasnodar region, 353467, Russian Federation, kuklev@ecologpro.ru

In 2010 made a detailed echo sounding in the Blue bay and also orographic and geologo-geophysical researches of adjoining sections of a land. Identified the unique features of the studied morphostructure. Powerful mudflow, formed as a result of the catastrophic shower 6-7 July 2012, dramatically transformed the bottom surface of the bay. It was assumed that the next storm could lead to erosion of fine material and, accordingly, changes the depth of its water area. In this regard, a year after the unprecedented natural phenomenon here re-shooting of the bottom relief. According to the corrected echo sounding in 2012 and 2013, set compiled bathymetric maps. These maps visually differ little among themselves. Therefore, the compilation and analysis of data about transformation of the depths performed on route profiles of Reference range. Marked change in the bottom topography for almost all of its area. Increase in depth and the corresponding decrease in the volumes of mudflow sedimentation (up to 30 % of the original) are explained by storm erosion of the newly formed strata. Echo sounding in 2013 has been extended to depths of 25 m. Comparison of the results of shootings 2012 and 2013, subject to erosion during the period under review, gave the chance to specify volume of a mudflow of the river Ashamba during catastrophic flooding, which was nearby 1300000 m . Route observations revealed that the most active mudflows formed on the eastern slope of mountain Doob. Happened here overdeepened dry valleys and temporary watercourses. and on the surface of the alluvial fans generated previously at bottom of mountain Doob, formed a vast canyon (depth 4-7 m, length 120 m, width of 15-17 m). Probably, that the products of the powerful erosion slope of the valleys were the main components of the mudstone stream.

Key words: орография, полигон, эхолотирование, эрозия, селевой поток, размыв, рельеф, трассовые профили, orography, range, echo sounding, erosion, mudflow, washout, relief, route profiles

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