## 5 Materials and Methods  
### Empirical Calculation of the Shear Wave Velocity (V\({}_{s}\))  
For the shear wave velocity (V\({}_{\rm s}\)) determined using the SPT-N blow count, many studies were carried out for different soils, and empirical approaches based on the SPT-N blow count have been produced [1; 21; 3; 41; 42; 43; 44; 45; 46; 47; 48; 49; 50; 51; 52; 53; 54; 55; 56]. These empirical approaches consist of equations using the uncorrected SPT-N blow counts, as well as equations using the energy-corrected SPT-N(N\({}_{60}\)) blow counts. While previous studies generally examined the relationships between the V\({}_{\rm s}\)-SPT-N measurements for all soils, in this study, only the relationship between the V\({}_{\rm s}\)-SPT-N measurements for sandy soil was investigated. In addition, statistical criteria, such as the mean square error (MSE), root-mean-square error (RMSE), mean absolute percent error (MAPE) and mean absolute error (MAE), were used to compare the estimation performance of the regression equations developed for the uncorrected SPT-N blow count and the corrected SPT-N (N\({}_{60}\)) blow count.  
The boundaries of the study area were determined as alluvial deposits in the central, eastern, and southern regions of the Canakkale settlement area. A total of 125 geotechnical borehole studies and 73 seismic refraction measurements with different profile lengths were carried out in this area (Figure 2). As geotechnical and geophysical studies carried out in the scope of the microzonation studies in the Canakkale settlement area were performed at different times, and by different teams, as well as due to the negative physical conditions in the city of Canakkale, full compatibility could not be achieved for the locations of boreholes and seismic refraction measurement points. Therefore, in this study, borehole locations and seismic refraction measurement points that are close to each other were compared. Furthermore, locations showing an inconsistency between the V\({}_{\rm s}\) velocity and SPT-N blow count were not included in this study. Within the scope of this study, empirical correlations between the uncorrected SPT-N value and energy-corrected SPT-N(N\({}_{60}\)) value, and V\({}_{\rm s}\) taken from 50 seismic refraction measurement points and 50 geotechnical borehole locations in Quaternary alluvial deposits in the center, east, and south of the Canakkale settlement area were examined (Figure 5).  
\begin{table}
\begin{tabular}{l c c c c c c c c c c c c} \hline \hline \multicolumn{1}{c}{\multirow{2}{*}{**Properties**}} & \multicolumn{4}{c}{**Fine-Grained Soils (ML, CL, MH, and CH)**} & \multicolumn{4}{c}{**Coarse-Grained Soils (SC, SM, SP, and SW)**} \\ \cline{2-13}  & **Sample Count** & **Min** & **Max** & **Mean** & **SD** & **SE** & **Sample Count** & **Min** & **Max** & **Mean** & **SD** & **SE** \\ \hline Nat. water cont., w\({}_{\rm n}\) (\%) & 155 & 9.6 & 67.6 & 28.3 & 8.93 & 0.72 & - & - & - & - & - & - \\ Unit weight \(\gamma_{\rm n}\), & 27 & 18.13 & 21.41 & 18.38 & 0.61 & 0.12 & - & - & - & - & - & - \\ Liquid limit, LL (\%) & 149 & 24 & 73.5 & 47.8 & 11.84 & 0.97 & 35 & 23.5 & 56.5 & 32.3 & 6.16 & 1.04 \\ Plastic limit, PL (\%) & 149 & 17 & 29.5 & 23.4 & 4.46 & 0.37 & 35 & 14.6 & 29.3 & 17.7 & 3.34 & 0.56 \\ Plasticity index, PI (\%) & 149 & 7 & 44 & 22.4 & 8.31 & 0.68 & 35 & 8.9 & 27.2 & 14.7 & 3.90 & 0.66 \\
**\#4** sieve (\%) & 156 & 0 & 5.3 & 1.4 & 1.44 & 11.09 & 798 & 0 & 43.6 & 3 & 5.93 & 0.21 \\
**\#200 sieve (\%)** & 156 & 51.2 & 96.4 & 77.6 & 11.09 & 0.89 & 798 & 0.2 & 49.5 & 11.7 & 9.38 & 0.33 \\ \hline \hline \end{tabular}
\end{table}
Table 1: Geotechnical properties of the Quaternary alluvium in the center, eastern, and southern sections of the city of Canakkale.