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Abstract
The trend of variation of sediment radiocontamination, expressed as a function of space and time, and specific accumulation of particular radionuclides in some investigated localities, are discussed on the basis of experimental results of gamma spectrometric analyses of artificial radionuclide contents.
The advantages brought by high resolution satellite data in activities related to flood mapping and flood monitoring are well know in the scientific community. The paper aims to prove that slighter older geospatial documents, such as historical maps, are also a valuable resource for cartographers and decision makers to achieve a better understanding of flood patterns and evolution. Some preparatory actions are needed in order to integrate the old maps into GIS environments for advanced analysis. This includes scanning, color enhancements, georeferencing, reprojection and metadata creation. To illustrate the process, the paper includes a real case scenario: the April 2006 Danube River flood. For one of the most affected sectors along the Danube, close to Rast village, three generations of historical maps (the Austrian 1:200 000 ‘degree maps’, the Romanian 1:20 000 ‘Lambert-Cholesky’ maps and the Soviet Union 1:100 000 ‘Gauss-Krüger’ maps) were processed and included in a large repository. At any time, the maps can be identified and accessed through open standard protocols like CSW and WMS. In this way, we were able to integrate and analyze the flood water masks, extracted from satellite data, along with the historical data sets. The results were very promising. It was possible to understand some flood patterns and to clearly demonstrate that, after the dike failure, the water filled up an area which in the past, before river regulation, was the natural Danube floodplain.
Abstract
This paper presents the results of radioactivity studies of environmental factors such as surface water, sediment, aquatic vegetation and soil. The concentrations of137Cs,90Sr,3H, U, Ca, and Mg in water samples were determined by radiochemical and chemical methods. Gamma-spectrometric analyses were performed for all the samples. The analysis showed a decrease in concentrations of137Cs in water, aquatic vegetation and sediment, but a constant level of137Cs activity in soil (0–5 cm depth). The average concentrations of90Sr,3H, U, Ca and Mg were about 7 mBq/l, 11 Bq/l, 0.6 
g/l 60 mg/l and 11 mg/l, respectively.
. [19] Šoltész A. , Baroková D. Analysis of surface and ground water interaction in the Danube River branch system , Proc. of 14th International
the northeast by the Little Danube River. It is a lowland area, which is protected by dykes against direct flooding, with relatively small depths of groundwater level below the ground. However, dykes do not exclude the possibility of bank filtration
Water resources management and its homeland security aspect in Hungary
Vízbiztonság mint belbiztonság Magyarországon
. 6 ICPDR (2015a) Annual Report on the Activities of the ICPDR 2014, International Commission for the Protection of the Danube River, Vienna, ICPDR, pp. 8
The large-scale archaeological excavations of the past years yielded a rapid increase of archaeological finds and observations. This large amount of new evidence enabled the observation of wider environmental archaeological relationships. In the study we reconstruct certain environmental and settlement pattern changes from the 13th to the 18th centuries based on archaeological data from the southern shore of Lake Balaton and the cities of the Danube Bend region. The settlements on the shore of Lake Balaton and along the Danube reacted similarly, but with a temporal lag. Hydroclimatic changes caused a shift in the location and structure of lake- and riverside settlements, which was of a horizontal character in the case of Lake Balaton, and of a vertical character in the case of the Danube Bend region.
. Horusitzky 1939 Budapest Duna jobbparti részének hidrogeológiája Hidrológiai Közlöny 18 1 404 (Hydrogeology of the right side of the Danube River
