## 2 Materials and Methods  
### Geometry  
The _Fuchslochwelle_ comprises various components, as depicted in Figure 2. These include the inflow basin, a concrete canal where the wave module is installed, inlays, a baffle, and the outlet basin. The basins represent the natural riverbeds, which were measured prior to the study to ensure accurate representation, especially of the outflow topology. The wave module itself consists of several subcomponents, including a static base, a plate, and a so-called kicker, as illustrated in Figure 2D. The CAD model was designed using PTC Creo Parametric v10.0 (PTC Inc., Boston, MA, USA). Each component was designed as a.prt file and assembled into a comprehensive.asm file. This approach allowed for the generation and simulation of various wave configurations. Figure 2D highlights the different parameters that can be changed to achieve different wave setups. Various parameters, including mass flow rate (\(Q\)), the difference between upper and lower water level (\(\Delta l_{W}\)), the distance between the plate and upper (\(d_{S}\)) and lower (\(d_{P}\)) water levels, the kicker angle (\(\theta_{K}\)), and the inlay angle (\(\theta_{I}\)), were kept constant throughout all conducted simulations, as shown in Table 1.  
This study focuses on installing and modifying baffles on the inlay, considering its asymmetries, angles, and position on the inlays. The geometry of the used baffle is shown in Figure 2E. Table 2 summarizes all the simulations conducted for the symmetric and asymmetric configurations of the inlay and baffle setups. A total of 15 wave/inlay/baffle configurations is shown in Figure 2E. The figure shows a **(A)** satellite picture of the _Fuchslouculele_ with the inflow basin, the concrete canal and outflow basin; **(B)** the wave module and inlay within the concrete canal; and **(C)** CAD model of the _Fuchslouculele_: (1) inflow basin, (2) concrete canal, (3) outflow basin, (4) wave module, (5) inlay, and (6) potential baffle. **(D)** Schematic CAD view of the primary variables for various geometry variants, featuring different configurations of the wave module (gray), inlays (beige), and baffle (dark green). The blue plane represents the water level at the inlet, while the green plane indicates the water level at the outlet. The flow direction of the water is illustrated by the light blue arrow. The physical values for the simulations are further detailed in Table 1. Subfigure **(E)** shows the geometry of the installed baffle with its dimensions shown in meters. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multicolumn{2}{c}{**Environment**} & \multicolumn{3}{c}{**Wave Module**} & \multicolumn{3}{c}{**Inlay**} \\ \hline \(Q/\text{m}^{3}/\text{s}\) & \(\Delta l_{W}/\text{m}\) & \(d_{S}/\text{m}\) & \(d_{P}/\text{m}\) & \(\theta_{K}/^{\circ}\) & \(h_{l}/\text{m}\) & \(l_{l}/\text{m}\) & \(\theta_{l}/^{\circ}\) \\ \hline
9.3 & 1.14 & 0.717 & 0.91 & 6 & 0.5 & 3 & 24.65 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: The constant parameters used in all simulations, including the mass flow rate (\(Q\)), the water level difference (\(\Delta l_{W}\)), the distances between the plate and the upper (\(d_{S}\)) and lower (\(d_{P}\)) water levels, and the kicker angle (\(\theta_{K}\)) and the inlay angle (\(\theta_{l}\)). Figure 2: The figure shows a **(A)** satellite picture of the _Fuchslouculele_ with the inflow basin, the concrete canal and outflow basin; **(B)** the wave module and inlay within the concrete canal; and **(C)** CAD model of the _Fuchslouculele_: (1) inflow basin, (2) concrete canal, (3) outflow basin, (4) wave module, (5) inlay, and (6) potential baffle. **(D)** Schematic CAD view of the primary variables for various geometry variants, featuring different configurations of the wave module (gray), inlays (beige), and baffle (dark green). The blue plane represents the water level at the inlet, while the green plane indicates the water level at the outlet. The flow direction of the water is illustrated by the light blue arrow.