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Title: FLOOD HAZARD MAPPING USING TWO-DIMENSIONAL HYDRAULIC MODELING RESULTS
FLOOD HAZARD MAPPING USING TWO-DIMENSIONAL HYDRAULIC MODELING RESULTS

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Vesela Stoyanova; Snezhanka Balabanova; Georgy Koshinchanov; Valeriya Yordanova; Silviya Stoyanova
10.5593/sgem2022/3.1/s12.12
10.5593/sgem2022/3.1
1314-2704
978-619-7603-42-2
English
22
3.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Hydrology and Water Resources
Floods are one of the deadliest natural disasters in the world. According to the World Meteorological Organization (WMO), this is a consequence of the increasing frequency of heavy precipitation, changes in upstream land use, and a continuously increasing concentration of population and assets in flood-prone areas [1]. For this reason, flood prevention, and protection are a growing priority these days. Flood hazard mapping is a state-of-the-art tool for decision-makers and stakeholders when it comes to flood protection and Flood Risk Management Plans. The visualization of the various parameters (range, depths, velocities, etc.) of a flood event gives a clear vision for implementing measures that help to protect and restore the natural functions of rivers and floodplains. This article presents the different types of flood hazard maps - with either a single parameter or a combination of several parameters (range, depths, velocities, and combination of flow velocity and flow depth. For this purpose, results obtained from 2D modeling with the software product HEC-RAS were used. The digital terrain model used was provided by Drone and has a resolution of 0.05 cm. Land cover information from CLC 2018 was used to determine the Manning coefficients. According to Art. 146e. of the Water Act (New, SG No. 61/2010) [2], several scenarios should be considered for Bulgaria: low-probability floods, medium-probability floods, and high-probability floods. As a result, a number of maps with different probabilities of flood occurrence and different flood parameters were obtained. These maps were used to analyze and assess potential damage in the different flood scenarios and parameters.
[1] https://public.wmo.int/en/resources/world-meteorological-day/previous-worldmeteorological-days/climate-and-water/floods
[2] Water Act (New, SG No. 61/2010)
[3] Balabanova, Sn., Stoyanova, V. „SIMULATING FLASH FLOODS IN URBAN AREAS USING TWO-DIMENSIONAL HYDRAULIC MODEL“ International Multidisciplinary Scientific GeoConference: SGEM, 2021
[4] Д. Соколовски, РЕЧНИЙ СТОК, Гидрометеорологическое издателство, Ленинград, 1959
[5] Stoyanova, V., Balabanova, Sn., Yordanova, V. EVALUATION OF THE THRESHOLDS FOR FLOOD FORECASTING AND WARNING. Electronic book with full papers from XXVII Conference of the Danubian Countries on Hydrological Forecasting and Hydrological Bases of Water Management, 2017, ISBN:978-954- 90537-2-2, 435-443
conference
https://doi.org/10.5593/sgem2022/3.1/s12.12
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Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 04 - 10 July, 2022
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
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.
97-104
04 - 10 July, 2022
website
8531
floods; flood hazard mapping; hydraulic modeling; HEC-RAS