Toxic Gas Plume Cross-Section & Profile Simulator

When an industrial facility releases a toxic gas, emergency planners need one thing fast: how far does the danger reach downwind, and how does it interact with the ground? This 2D simulator implements the same Gaussian atmospheric dispersion model used in real hazmat consequence assessment, but renders it two ways at once: a vertical downwind cross-section that shows the ground-reflection mirror-image term directly, and a synchronized concentration-vs-distance profile that traces the IDLH hazard boundary — the same kind of contour used to size evacuation and shelter-in-place zones around a real chemical spill.