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Developing a data-driven hydrodynamic model of a marine environement, using ship-based ADCP measurements in the North Sea

Leemeijer, W.W. (2023) Developing a data-driven hydrodynamic model of a marine environement, using ship-based ADCP measurements in the North Sea.

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Abstract:Hydrodynamic data is used as input data for morphological models, predicting the behaviour of the seabed. Using a ship-based DVL, the Dutch Navy made velocity measurements in the North Sea. These measurements have the potential to improve the spatial resolution compared to buoy measurements, since the measurements are made while sailing, and the potential to improve the quality of the hydrodynamic data compared to numerical coastal shelf models such as the Dutch Coastal Shelf Model (DCSM). First, the data is pre-processed and filtered after which the tidal velocity signal is extracted. Next, two methods have been developed for ship-based DVL measurements to make predictions in a certain model domain for the tidal velocities, the Spatial-from-Temporal Phase Estimation (STEP) method and the Wave Celerity (WC) method. The output for both methods show that the eastward velocity amplitudes are overestimated, but the northward velocity amplitudes are similar to the data. Furthermore, the output of the WC method showed a high correlation of 0.9 to the DCSM. Hence, the WC method shows promising results, but better data is needed and more physical processes need to be implemented before this method can be used as hydrodynamic input data in morphological models.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:56 civil engineering
Programme:Civil Engineering and Management MSc (60026)
Link to this item:https://purl.utwente.nl/essays/97395
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