North West Shelf Joint Environmental Management Study:InVitro input - Modelling and extrapolation of contaminants

Contaminants were modelled as nested sets of polygons representing plumes of differing concentrations spreading from their source. Nodes of the polygons were advected by the currents and 'diffused' at each time step until the contour became so dilute that it was eliminated because the concentrations reached the lower threshold for tracking. Nodes of the plume were also excised if the plume became so thin that the nodes were very close to each other. The temporal spatial footprint is presented as an image time series.