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The stability of a slope subjected to rainfall events of increasing intensity and decreasing duration is analyzed with FLAC. The apparent cohesion provided by capillary forces in unsaturated soil is simulated using the two-phase fluid flow logic. As soil saturation increases, soil cohesion can decrease and result in slope collapse.

Keywords:

• Slope Stability
• Capillary effects
• Soil saturation
• Two-phase flow
• Mohr-Coulomb model

Materials:

• Soil
• Water

Analyses:

• Fluid Flow
• Static