Several ultra-high resolution seismic surveys have been carried out on the river Danube during the past few years. Main objective of the surveys nearby Budapest was to map the distribution of fluvial deposits, mainly gravel and sand, under the river bottom. Mapping and monitoring the distribution of gravel beds is crucial for water management, as water supply for the whole city (more than 2 million people) is provided from bank-filtered water resources. Ultra-high resolution river seismic surveys can provide a very detailed (0.1 m resolution) image of the river deposits and the underlying older strata. The method has been demonstrated to be a powerful tool for mapping the 3D distribution of the fluvial sediments.


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