Results overview
Assessment of landfill gas, leachate and slope stability before and after rehabilitation.
Gas · after rehabilitation
Leachate · comparison
Slope stability · comparison
Select a section from the sidebar to edit inputs and inspect detailed calculations. Default values come from the original Excel workbook.
INPUT DATA · Landfill
Input parametersThe remaining fraction (other/inert materials) is calculated automatically to bring the total to 100%.
Landfill gas emissions over time
Before and after rehabilitation · first-order decay modelRESULTS · Landfill gas
Mass and emissions balance from the source workbookINPUT DATA · Leachate
Hydrological and waste parametersOperating years, rehabilitation year and waste composition are shared with the gas calculations and can be edited in the “Landfill gas” section.
Leachate management scenarios
Numerical results · RESULTSRESULTS · Leachate and COD load
Assumptions in the source model
In the source workbook, future leachate volume and COD load after rehabilitation are both set to zero. This is a model assumption, not a guaranteed operational outcome. The hydrological balance components and the 100-year analysis horizon follow the Excel formulas.
INPUT DATA · Slope stability
Geometry, material properties, leachate level and seismic loadingRESULTS · Stability assessment
FS — numerical range and stability classificationInterpreting the safety factor (FS)
Methodological note
The original Excel model reports safety-factor intervals, not exact FS values. Under non-seismic conditions: FS > 1.5, FS between 1.1 and 1.5, or FS < 1.1; under seismic loading: FS > 1.2 or FS < 1.2. This classification reproduces interpolation across the source lookup tables. It is not a substitute for an independent geotechnical assessment.