Landfill Gas Generation Curve: 2D LandGEM Decay Model

A landfill isn't a single source of methane — it's thousands of separate waste cells, each buried in a different year and each decaying on its own exponential clock. This 2D simulator lays out a landfill mound as a rotatable isometric spiral of annual waste cells using the EPA's LandGEM first-order decay equation, glowing each cell by how much of its original methane output it still has left, while a live curve panel beneath it traces the site's total generation rate rising through the active filling years, peaking near closure, and decaying for decades afterward. Drag the mound to spin it, or adjust the waste acceptance rate, decay constant, methane generation potential and active life to see how each reshapes the curve gas-collection engineers use to size wells, pipes and flares.