Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/nhess-2016-404
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
17 Feb 2017
Review status
This discussion paper is under review for the journal Natural Hazards and Earth System Sciences (NHESS).
Meteorological analysis of flash floods in Artvin (NE Turkey) on August 24, 2015
Hakki Baltaci Turkish State Meteorological Service, Istanbul, Turkey
Abstract. On August 24, 2015 intense rainfall episodes generated flash floods and landslides on the eastern Black Sea coast of Turkey. As a consequence of the heavy rainstorm activity over Artvin and its surroundings (NE Turkey), 11 people died and economic losses totaled a million dollars. During the six hours of the event (from 05:00 UTC to 11:00 UTC), total accumulated rainfall of 136, 64, and 109 mm was measured in the Hopa, Arhavi, and Borçka settlements of Artvin city, respectively. This study comprehensively investigates the meteorological characteristics of those flash floods. In terms of synoptic mechanisms, the cut-off surface low from the summer Asian monsoon settled over the eastern Black Sea. After two days of quasi-stationary conditions of this cyclone, sea surface temperatures (SSTs) reached 27.5 °C (1.5 °C higher than normal) and low-level moisture convergence developed. In addition, transfer of moisture by warm northerly flows from the Black Sea and relatively cool southerly flows from the land coasts of the Artvin district exacerbated the unstable conditions, and thus, played a significant role in the development of deep convective cells. Severe rainstorms as well as the slope instability of the region triggered landslides and worsened flood damage in the Artvin.

Citation: Baltaci, H.: Meteorological analysis of flash floods in Artvin (NE Turkey) on August 24, 2015, Nat. Hazards Earth Syst. Sci. Discuss., doi:10.5194/nhess-2016-404, in review, 2017.
Hakki Baltaci
Hakki Baltaci
Hakki Baltaci

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