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ANALYSIS OF HIGH WAVE DURING HYDROLOGICAL EXTREME EVENT ON 10-15 DECEMBER 2021 WITH SIGNIFICANT RAINFALL IN SOUTHERN BULGARIA
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Katia Paralska; Petko Tsarev; Rositsa Stefanova; Georgy Koshinchanov
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10.5593/sgem2022/3.1
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1314-2704
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English
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22
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3.1
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• Prof. DSc. Oleksandr Trofymchuk, UKRAINE
• Prof. Dr. hab. oec. Baiba Rivza, LATVIA |
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Manual measurement of flow velocity and streamflow discharge during high waters is often impossible because of different factors: night events, harsh meteorological conditions, very high dangerous river velocities and levels or infrastructure destruction.
The purpose of this study is to determine maximums of river flow velocity and streamflow discharge with hydraulic engineering methods, as well to determine the modulus of runoff at some stations in the East Aegean River Basin in South Bulgaria for the period between 10 and 15 December 2021 characterized with heavy rain. At that time significant precipitations were observed in South Bulgaria as result of a large cyclone over the East Mediterranean area. As a result of these precipitations, the river water levels in the whole country have raise, but the most significant increases were observed in the rivers of the Rhodope Mountains: upper streams of Arda River, the rivers Varbitsa, Krumovitsa, Vacha, Shirokolashka, Chepelarska, etc. On Arda River a large pedestrian bridge altogether with the telemetric station for quantitative river flow monitoring were destroyed and engulfed by water. We determined analytically the maximum streamflow discharge and water levels of Arda River at the village of Kitnitsa and of Vacha River at the station of Zabral. Computed data shows statistic probabilities of maximum streamflow discharge of about 20 year return period (5%). Hydrographs from stations for water levels in the upper or downstream of the river flow are used for revision and verification. We also use information about the calculated surface velocity with the LSPIV method and we show results computed with the coupled SURFEX-RAPID hydrological model. A retrospective analysis is made using data on high waters that passed on 12th December 1991, during which similar water quantities were observed along Varbitsa River. |
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conference
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Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
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22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 04 - 10 July, 2022
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Proceedings Paper
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STEF92 Technology
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International Multidisciplinary Scientific GeoConference SGEM
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SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Turkish Acad Sci.
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33-40
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04 - 10 July, 2022
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website
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8523
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Arda River, extreme rainfall, flood return period, SURFEX, RAPID, LSPIV
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