Geomorphic consequences of catastrophic flash flood in low mountains of the Western Caucasus (Gelenndzhik District of the Krasnodarskiy Region, European Russia)тезисы доклада
Дата последнего поиска статьи во внешних источниках: 9 марта 2017 г.
Место издания:Instituto Politecnico de Bragança Braganca, Portugal
Первая страница:203
Последняя страница:203
Аннотация:In July 2012 heavy flash flood hit the Kranodarsky Region. It was caused by extreme
rainfall highest since 1971. Flash floods occurred on a number of rivers and caused
severe damages to settlements and infrastructures as well more than 30 causalities in
the town of Krymsk, which was hit by the 8 m high flood wave during the night time.In
this study, we consider geomorphic consequences of this flash flood in the basin of
small river Ashamba located at the southwestern outskirts of Gelendzhik City. The
basin area is 42.6 km2, length of the river is about 12 km. Its headwaters are located on
the Markothskiy Ridge up to 850 m a.s.l., while its most part are within the elevation of
200‐300 m a.s.l. Upland headwaters are mainly forested, while middle and lower
reaches dominated by alternation of woodland and wineyards with countryside
households in valley bottom. Some of these households were also damaged during the
July 2012 flash floods, though there were no causalities in this area.
In order to evaluate geomorphic consequences of the year 2012 event we combine
results of field investigations and comparative interpretation of satellite images from
the free access source GoogleEarth dated to 01.05.2012 and 27.04.2013. Main
detected features that appeared during that time span include destabilized slopes
(landslide scars), intensive channel deformations of main river and its tributaries,
formation of debris fans, incision of small gully‐type erosion features and destruction
of anthropogenic objects. Several of such features were surveyed in the field in order
to evaluate their volumes. The most affected part of the Ashamba basin is its lower
part beginning about 2 km from its mouth.