Method and device for screening and predicting exposure concentration in organic chemical leakage environment medium

The invention relates to a method and a device for screening and predicting exposure concentration in an organic chemical leakage environmental medium, and the method comprises the steps: receiving an input organic chemical type, leakage rate and leakage mode, and obtaining physical and chemical parameters corresponding to the organic chemical type, and half-life periods in various environmental mediums; receiving an input leakage occurrence place, and obtaining meteorological and hydrological parameters corresponding to the place; the method comprises the following steps: selecting a leakage occurrence place and a surrounding to-be-predicted area, segmenting the leakage occurrence place and the surrounding to-be-predicted area into a plurality of grids or segments, respectively establishing a differential mass balance equation of each environmental medium in each grid or segment, and constructing to obtain an area environmental system model; and taking the obtained data as the input of the regional environme