# 2-D Cross-Plot Model Analysis Using Integrated Geophysical Methods for Landslides Assessment
## 3 Results  
In this section, the result of 2-D resistivity and seismic refraction were discussed with the integration of the data using cross-plot analysis. The output model of 2-D cross-plot  
Figure 5: The workflow of cross-plot analysis and development of the 2-D model. Figure 6: Graphical illustration of volumetric mass movement calculations. revealed the vulnerability of the subsurface and the information from the model were used in estimated mass sliding. Figure 7a shows the inversion model of 2-D resistivity for HR1 and seismic refraction of HS1. The 2-D resistivity shows resistivity values ranging from 1-10,000 \(\Omega\)m with depth coverage of about 80 m. The orientation of these lines is parallel to the landslide area, which is oriented from the East to West (E-W) direction. The resistivity result indicated two different contrast zones of the resistivity layer. The resistivity zones between 100 and 1200 \(\Omega\)m indicate as a weathered zone, with a depth 20 m from the surface. In this profile, this layer is categorized as highly weathered zones, with the presence of boulders with resistivity values ranging between 1200 and 3500 \(\Omega\)m. A saturated zone with a resistivity of \(<\)100 \(\Omega\)m was identified at depth \(>\)25 m. The fractures zone was identified due to contrast in resistivity values, as shown in the dotted line. The seismic refraction profile of HS1 shows three layer cases, where the first layer is indicated as a highly weathered zone with velocity values of \(<\)1200 m/s. The second layer with a velocity ranging of 1000-2000 m/s indicates the weathered zone, which represents the loose material or highly weathered bedrock. The third layer was indicated as bedrock at velocity values of \(>\)3800 m/s. Figure 7b shows the inversion model of 2-D resistivity for HR2 and seismic refraction for HS2. In 2-D resistivity, two distinct zones were identified based on the contrast values. Figure 7: Inversion model of 2-D resistivity and seismic refraction: (**a**) HR1 and HS1; (**b**) HR2 and HS2; (**c**) HR4 and HS3; (**d**) HR3; (**e**) HR5; (**f**) HR6. Highly weathered colluviums zones ranged from 100-1200 \(\Omega\)m with a depth of 30-70 m from the surface. The contrast resistivity zone at a distance of 100 m was suspected as a fracture zone for this profile (dotted line). The saturated zone with a resistivity of \(<\)100 \(\Omega\)m was identified at a depth \(>\)20 m. For the seismic refraction profile, in line with the resistivity, showed the first layer dominate with velocity values ranging \(<\)1200 m/s at a depth of 5-20 m. The second layer with granitic bedrock identified velocity values of \(>\)3800 m/s. Figure 7c shows the inversion model of 2-D resistivity for HR4 and seismic refraction of HS3. For HR4, two distinct zones were identified as same as the lines HR1 and HR2, where colluvium was identified at resistivity values of 100-1200 \(\Omega\)m with a depth of 20-70 m, while the saturated zone identified at values of \(<\)100 \(\Omega\)m. The bedrock was identified at resistivity values \(>\)7000 \(\Omega\)m with the fracture zones mark with a dotted line in this profile. The seismic profile of HS3 shows the three layer cases, where the first layer identified at a velocity of \(<\)600 m/s while the second layer at 1250-1500 m/s, with a depth of 5-10 m. The third layer, with velocity values ranging from 2900-3300 m/s, identified as the weathered bedrock for this profile, with a depth of 20-30 m. Figure 7d-f shows the inversion model of 2-D resistivity of lines, HR3, HR5, and HR6.