Abstract
Quantitative slope stability assessment draws on three analysis modes: limit equilibrium (LEM) and finite element shear strength reduction (SSRM) for stability, and groundwater seepage for pore pressures. These are typically run in costly, closed commercial suites, and existing open-source tools cover only one mode at a time. xslope is an open-source package that integrates all three from a single shared problem definition: seven LEM methods, finite element SSRM, and finite element seepage for saturated and unsaturated flow, steady-state or transient. We validated it against the published verification manuals of two widely used commercial suites (Rocscience Slide2 and RS2, GeoStudio SLOPE/W and SEEP/W) and against classical analytical benchmarks, reproducing more than 230 benchmark problems and the nearly 700 individual values they carry, all of which are shipped as an automated regression suite. xslope reads and writes GeoStudio (SLOPE/W) files and imports Rocscience (Slide2, RS2) input files, so it fits existing workflows. It ships as a scriptable library and as a cross-platform desktop application, XSLOPE Studio, and its scriptable core exposes the solvers to parametric, Monte Carlo reliability, and AI-assisted workflows that closed software does not allow. xslope is released under the Apache 2.0 license with full documentation and reproducible verification files.
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