Author(s): Gabor Fleit; Sandor Baranya; Tamas Kramer; Janos Jozsa
Linked Author(s): Sándor Baranya
Keywords: No Keywords
Abstract: Riverine ship traffic results in the temporal alteration of the flow regime in the close proximity of the vessels, but waves propagating in the direction of banks may also have significant hydrodynamic effects. Ecohydraulic problems related to vessel induced wave wash (e. g. bank erosion; drift of larval fish or macroinvertebrates) are getting increased attention lately, which calls for a thorough investigation of the flow phenomena and the connection between the related biotic and abiotic features. In present study, a comprehensive field and computational methodology is presented for the detailed assessment of relevant hydrodynamic processes in the littoral zone, where the ecologic impacts of ship waves are believed to be the most significant. The analysis of high resolution acoustic velocimeters (ADV) and hydrodynamic pressure gauges is presented for the assessment of wave hydrodynamics in single points and verticals. Furthermore, the field data is exploited to set up and validate a detailed CFD model, which provides with the opportunity to evaluate conditions for which no measurements are available and highly detailed, complex free surface features such as breaking waves as well. The presented results improve our understanding of ship waves from the hydrodynamic point of view, which is fundamental for the coupling of the related biotic and abiotic variables for such interdisciplinary research.
Year: 2018