About the thesis:

Maintaining the Dutch rivers on a sufficient depth is essential for safe navigation. A range of methods exist for extracting the required information from the acoustic measurements. All methods have advantages and limitations. To assess these advantages and limitations, six parts of various Dutch rivers, spanning a large range of sediment types, were surveyed during a period of 4 years using multi-beam echo-sounder (MBES) sonars operating at 300 kHz. Physical grab samples were also taken from the rivers to assist the classification. The mean grain size of the grab samples of the rivers vary from relatively fine (~5 ) to extremely coarse (<-6 ).

About the Author:

Dimitrios Eleftherakis was born on the 5th of March 1974. He graduated as mechanical engineer from the University of Patras, Greece, in 1998. His great passion for the sea and especially underwater activities led him to study an MSc course in Offshore and Ocean Technology (specialized in diving and underwater technology) at Cranfield University in 2005-2006. He joined the Delft University of Technology in 2009 to study underwater acoustics in depth.