Chemical Pollution — River Advection-Diffusion Simulator

Water pollution rarely stays where it enters a river: a discharge is carried downstream by the current, spreads sideways by turbulent mixing, and — depending on the chemical — either lingers for kilometers or breaks down within meters. This simulator tracks every released pollutant parcel individually, advecting it with a realistic channel flow profile and diffusing it with random-walk noise, while a live heatmap on the riverbed marks exactly where the concentration is still above the maximum admissible concentration (ГДК/MAC). Click to move the outfall, tune the flow speed, release rate and pollutant persistence, and watch the danger zone grow or shrink in real time.