Surface Wave Attenuation over a Permeable Bottom

This dataset contains experimental data from the Master’s thesis “Surface Wave Attenuation over a Permeable Bottom” conducted at the Hydrodynamics Laboratory, University of Oslo, in spring 2026. The experiments were performed in a 25 m long, 0.5 m wide, and 1 m tall wave tank filled with fresh water at room temperature. Two water depths were investigated: 20 cm and 30 cm. Two bottom configurations were tested: a bare tank bottom and a permeable bottom consisting of 35 vertical PMMA plates. The plates were 3 m long, 5 cm tall, and 5 mm thick, with 1 cm spacing between plates. The plate section was located between 6.3 m and 9.3 m from the wave maker. The dataset contains raw and processed surface elevation measurements from four acoustic probes positioned along the tank at 4.86 m, 6.69 m, 7.87 m, and 9.15 m from the wave maker. The raw data are organized by water depth, plate configuration, wave frequency, and forcing amplitude. Each experiment folder includes raw water level time series (*.csv), experiment metadata (*.meta.txt), and automatically generated statistics (*.stats.csv). Processed time series are provided in the Processed_files/ directory. Summary files containing calculated wave amplitudes and derived quantities for each experimental configuration are included in the Calculated_amps/ directory. Folder names follow the convention fXX for wave frequency in Hz (e.g. f11 = 1.1 Hz) and aXX for wave maker forcing amplitude in Volts (e.g. a01 = 0.1 V). Processed filenames containing p005 correspond to experiments performed with the plates inserted into the tank. The dataset also contains Particle Image Velocimetry (PIV) measurements. The PIV/ directory includes raw bitmap image sequences and processed velocity fields from experiments conducted with the plate configuration installed. These experiments were performed at a frequency of 1.4 Hz with forcing amplitudes of 0.1 V, 0.2 V, and 0.3 V. Waves propagated from right to left, and the PIV field of view began 8.06 m from the wave maker. Processed PIV results are provided as NetCDF files containing horizontal and vertical velocity components (u, w). Processing and analysis scripts used for this dataset are available at Github, kjes4pres/Master_code. Author: Kjersti StangelandSupervisors: Kai H. Christensen, Atle Jensen, Jan Erik H. WeberInstitution: University of Oslo, Department of Geosciences Contact: [e-mail] / [e-mail]