The paper presents results of measurements for tracheid lengths in annual growth rings in spruce wood classified as resonant wood. Annual rings came from the mature wood zone. Moreover, cellulose microfibril angle (MFA) was determined in the S2 layer of the secondary cell wall. This parameter was measured in tangential tracheid walls. Mean values of both tracheid lengths and MFA in the experimental annual growth rings showed slight fluctuations and the relationship of these values was described using a linear function.
An analytical approach was used to model the wave-induced set-up and flow through simple shoal geometry when water depth is a linear function of the distance. Two different approaches were applied to parameterize the energy dissipation due to wave breaking. The resulting set-up height and flow velocity were determined and their dependence on the geometry of the shoal and offshore forcing was demonstrated. The extension of the solution to a more complicated bathymetry and verification against the experimental data will be given in the second part of the paper.