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ANALYSIS OF THE IMPACT OF LOCAL LEAKS IN THE FLOOD CONTROL LEVEE
Abstract
In recent decades, society has paid increased attention to issues related to observed climate change, which also includes recurring extreme hydrological phenomena. Shortterm heavy rainfall and long-term droughts draw attention to the increased need for hydraulic structures, providing protection against floods or creating water supplies in times of water scarcity. Flood control levees are an important part of flood protection measures. We should give them constant attention to prevent them from collapsing, and their safety. Almost 3,000 km of flood control levees were built in Slovakia. Due to their age and importance, in recent years these structures require special attention due to the increased intensity of flood flows, reconstruction, or rehabilitation. The most common is the sealing of the levee bodies or their subsoil. Also, we can increase their crest levels due to changes in hydrological conditions in the last decades. The present article illustrates the results of a study related to increasing the safety of the Nitra levees. It is remarkable here that, despite the engineering research on the unproven occurrence of permeable local leaks, wet areas occur at the foot of the levees during floods. Attention is focused on the probable causes of these phenomena and the possibilities of their solution.
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Bednarova, E., Gramblickova, D., Sealing of the flood control levees of the Nitra River in rkm 42,330 � 48,456. Assessment of filtration stability and optimization of remediation measures. Bratislava, 2017. 76 s.
Ilkanic, A., Tupy, P., Velky Cetin � Cechynce, Nitra River � Sealing of the flood control levees in rkm 42,330 � 48,456. The engineering-geological survey, Envigeo Banska Bystrica, 2016
Jakubis, I. et. al.: Sealing of the flood control levees of the Nitra River in rkm 42,330 � 48,456. The engineering-geological survey. Geoconsult , s.r.o., Bratislava, 2017.
Thomas, S.D., Yuan, F.: Groundwater and the environment. The 2nd Annual Environmental Engineering Workshop. Groundwater modelling case studies. Oxford Geotechnika International. University of Durham, 1996
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