## 6 Discussion
### Data Integration and Calculation
The methodology proposed in this research has made it possible to establish the thickness of less compact materials (soft sediments not compacted o cemented), not only from direct investigations such as VES, but also in refraction or MASW seismic profiles. Therefore, the relationship established in Equation (3) defined the values of said thicknesses under each point of the HVSR point station. The use of relationships between the thicknesses obtained from VES surveys with HVSR tests has very few publications references. Only [21] uses this correlation between sediment thickness investigation and VES-type tests, whereas other authors, such as [47], use correlations obtained from electrical tomography tests but also combine and use results from mechanical drilling. In both cases, they concluded that the application of the geoelectric method techniques in combination with the HVSR measurements offer reliable results in determining the thickness of surface sediments. From the results obtained and presented in Table 4, these have been represented and analyzed by constructing a map of isolines of thickness values (isopach) that is presented in Figure 9. A special shape is located below HS5 and H9 points, which is the existence of a zone of great thickness (more than 55 m) in this central area and in relationship to the position of the greatest size of movement (just where the reinforced earth wall of Figure 2 has been built). \begin{table}
\begin{tabular}{c c c c} \hline
**HVSR Point** & \(f_{o}\) **(Hz)** & **Thickness (m)** & \(K_{g}\) \\ \hline S1 & 3.21 & 20.61 & 1.75 \\ S2 & 2.61 & 22.16 & 1.61 \\ S3 & 0.70 & 35.18 & 31.56 \\ S4 & 0.49 & 39.87 & 23.87 \\ S5 & 0.25 & 50.49 & 61.1  
To complete the analysis, it was drawn over the isopach map, across several sections. Figure 9 shows the position of the sections that have been made to analyze these results obtained (black dashed lines). Figure 10 shows the longitudinal sections of the landslide (according to the direction of movement), and variations can be observed in the bottom and the position of the rocky substrate (Section 6) with a section (central Section 1) in which a typical distribution of a landslide with a thickening of the materials in the lower part caused by deposition. In said longitudinal sections, it is also possible to observe the presence of a projection in the area of the lowest elevation (a peak from the basement), which may be one of the factors preventing the whole slide of all mass over the basement from continuing towards lower elevations of the terrain, which could be observed in the field. Lastly, in Section 7, traced by the zone where less movement is observed and the rock outcrops at some nearby point, the thickness of the sediment is less than 15 m.  
The landslide surface traced in this section from the available data seems to respond to a translational landslide, or possible typology, since the thickness of moving materials along said section is maintained. However, the landslide can also have a rotational component or be considered a rotational -translational combination. In addition, by analyzing the morphology suggested by this research, it could be that the sliding area may respond to an accumulation of previous landslides (paleo-slides), as observed in nearby zones [44]. Figure 9: Isopach map (sediment thickness) traced with contour lines every 5 m thick (white lines) are represented with geological section positions (dashed black lines). White crosses refer to the coordinate points (Modified from [22]). A second depressed zone would be the outline of the shape of the landslide, in its central area, with a significant depression in the position of test H9 (the test that is also present in the longitudinal section) and with slopes to the north and south that present a steep slope. The raised area that is observed more clearly in the cross section also seems to be evident, more gently in the central area of the longitudinal section, approximately where tests H5 and H9 have been carried out (see Figures 4 and 9 for reference).