Assessing the impact of an arch-dam breach magnitude and reservoir inflow on flood maps
Different scenarios of an arch-dam breach and their impact on the time-space evolution of flood waves are analysed using numerical modelling. As the accidents involving this type of dam are among the most catastrophic ones, the 108 m in height Paltinu arch-dam, Romania, was chosen as a case study du...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2024-01-01
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| Series: | Journal of Hydroinformatics |
| Subjects: | |
| Online Access: | http://jhydro.iwaponline.com/content/26/1/33 |
| _version_ | 1797205118550016000 |
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| author | Daniela Elena Gogoașe Nistoran Cristina Sorana Ionescu Ștefan Mugur Simionescu |
| author_facet | Daniela Elena Gogoașe Nistoran Cristina Sorana Ionescu Ștefan Mugur Simionescu |
| author_sort | Daniela Elena Gogoașe Nistoran |
| collection | DOAJ |
| description | Different scenarios of an arch-dam breach and their impact on the time-space evolution of flood waves are analysed using numerical modelling. As the accidents involving this type of dam are among the most catastrophic ones, the 108 m in height Paltinu arch-dam, Romania, was chosen as a case study due to its problems in the past. Three dam breach magnitudes and two inflow hydrographs for the worst-case scenario of Normal Operating Pool elevation in the reservoir were chosen as variable parameters, to assess their influence on the dam break wave characteristics and downstream flooded areas. The flood was routed along the 18 km reach of the Doftana River down to the confluence with the Prahova River. A 2D numerical model was set up with the help of HEC-RAS software, which was also used to analyse the resulting hazard maps under a GIS environment. Comparison of inundation boundary, maximum depths and velocities, as well as the arrival time at control sections allow for conclusions to be drawn. These predictive results of shape, magnitude, and time to peak of the flood waves are essential for flood risk management to obtain the risk maps, estimated damage costs, and possible affected areas.
HIGHLIGHTS
The study investigates through 2D numerical modeling the consequences of a possible arch-dam failure in Romania.;
The study proposes a new methodology to assess the influence of different dam breach scenarios on the time-space evolution of flood waves.;
The proposed methodology could be applied to other similar flood studies.;
The research shows the advantages of using the proposed numerical method.; |
| first_indexed | 2024-03-08T03:17:20Z |
| format | Article |
| id | doaj.art-075ee19bcfbe4c5589a1be106584c031 |
| institution | Directory Open Access Journal |
| issn | 1464-7141 1465-1734 |
| language | English |
| last_indexed | 2024-04-24T08:46:02Z |
| publishDate | 2024-01-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Journal of Hydroinformatics |
| spelling | doaj.art-075ee19bcfbe4c5589a1be106584c0312024-04-16T13:30:33ZengIWA PublishingJournal of Hydroinformatics1464-71411465-17342024-01-01261335010.2166/hydro.2023.301301Assessing the impact of an arch-dam breach magnitude and reservoir inflow on flood mapsDaniela Elena Gogoașe Nistoran0Cristina Sorana Ionescu1Ștefan Mugur Simionescu2 Department of Hydraulics, Hydraulic Machinery and Environmental Engineering, Energy Engineering Faculty, University Politehnica of Bucharest, Bucharest 060042, Romania Department of Hydraulics, Hydraulic Machinery and Environmental Engineering, Energy Engineering Faculty, University Politehnica of Bucharest, Bucharest 060042, Romania Department of Hydraulics, Hydraulic Machinery and Environmental Engineering, Energy Engineering Faculty, University Politehnica of Bucharest, Bucharest 060042, Romania Different scenarios of an arch-dam breach and their impact on the time-space evolution of flood waves are analysed using numerical modelling. As the accidents involving this type of dam are among the most catastrophic ones, the 108 m in height Paltinu arch-dam, Romania, was chosen as a case study due to its problems in the past. Three dam breach magnitudes and two inflow hydrographs for the worst-case scenario of Normal Operating Pool elevation in the reservoir were chosen as variable parameters, to assess their influence on the dam break wave characteristics and downstream flooded areas. The flood was routed along the 18 km reach of the Doftana River down to the confluence with the Prahova River. A 2D numerical model was set up with the help of HEC-RAS software, which was also used to analyse the resulting hazard maps under a GIS environment. Comparison of inundation boundary, maximum depths and velocities, as well as the arrival time at control sections allow for conclusions to be drawn. These predictive results of shape, magnitude, and time to peak of the flood waves are essential for flood risk management to obtain the risk maps, estimated damage costs, and possible affected areas. HIGHLIGHTS The study investigates through 2D numerical modeling the consequences of a possible arch-dam failure in Romania.; The study proposes a new methodology to assess the influence of different dam breach scenarios on the time-space evolution of flood waves.; The proposed methodology could be applied to other similar flood studies.; The research shows the advantages of using the proposed numerical method.;http://jhydro.iwaponline.com/content/26/1/332d numerical simulationsarch-dam failureflood hazard mapflood wave routinghec-raspaltinu dam |
| spellingShingle | Daniela Elena Gogoașe Nistoran Cristina Sorana Ionescu Ștefan Mugur Simionescu Assessing the impact of an arch-dam breach magnitude and reservoir inflow on flood maps Journal of Hydroinformatics 2d numerical simulations arch-dam failure flood hazard map flood wave routing hec-ras paltinu dam |
| title | Assessing the impact of an arch-dam breach magnitude and reservoir inflow on flood maps |
| title_full | Assessing the impact of an arch-dam breach magnitude and reservoir inflow on flood maps |
| title_fullStr | Assessing the impact of an arch-dam breach magnitude and reservoir inflow on flood maps |
| title_full_unstemmed | Assessing the impact of an arch-dam breach magnitude and reservoir inflow on flood maps |
| title_short | Assessing the impact of an arch-dam breach magnitude and reservoir inflow on flood maps |
| title_sort | assessing the impact of an arch dam breach magnitude and reservoir inflow on flood maps |
| topic | 2d numerical simulations arch-dam failure flood hazard map flood wave routing hec-ras paltinu dam |
| url | http://jhydro.iwaponline.com/content/26/1/33 |
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