🔥 Smouldering Peat Fire: Moisture Threshold, Oxygen Supply and Ground-Fire Spread in a Bog Cross-Section

Light a smouldering ground fire in a peat bog cross-section and watch the glowing front creep through the soil. A heat-conduction, Arrhenius-oxidation and oxygen-diffusion model shows why peat that is dry enough burns for days while waterlogged or mineral-rich soil goes out: change moisture, density, mineral content, wind and the water table, find the moisture threshold, and compare it with an energy-balance estimate. Blender-modelled bog diorama.