Университет по архитектура, строителство и геодезия

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River Bed Erosion and Sustainable Solutions at the Austrian Danube River

Осми българо-австрийски семинар "Хидроложки опасности и свързаните с тях проблеми", 30 – 31 май 2019
M. Tritthart; M. Glas; H. Habersack; M. Liedermann
River Bed Erosion and Sustainable Solutions at the Austrian Danube River
ЦБ II 544

Детайли

Източник
Годишник на УАСГ
Година на издаване
2019
Пор.№
Бр.S1
Страници
с. S1443-1452
Том
52
Ключови думи
river bed erosion, groynes, morphodynamics, the Danube River
Отрасъл
Общ отдел. Наука. Библ. дело. Енциклопедии
Анотация
The Austrian Danube east of Vienna is characterized by a sediment deficit causing a long-term erosive trend and posing a hazard for a river bed breakthrough of the gravel cover layer into fine marine sediment deposits. As a remedy, various gravel replenishment methods, as well as the modification of groyne structures were tested. Replacing the top layer with a wide-graded sediment mixture resulted in the best stabilization effect. Moreover, modifications of groyne geometries were tested numerically, employing a sediment transport model based on 3D hydrodynamics. It was found that even comparably small changes to the existing groynes yield a strong morphodynamic reaction of the river bed. Morphodynamic equilibrium could be achieved in particular by optimizing the crest levels of the groyne structures. The measures implemented so far resulted in a clear reduction of the erosion trend in the river reach.
Системен №
4930

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