Abstract

For a long term the accumulation of pollutants in the Bohai Sea brings great damage to marine ecosystem, huge economic and social losses. This paper sets up a frame work modeling the optimal path of industrial pollution abatement under tradable permit and seawater cleaning project. Three sub-models are set up which reveal pollution-fish stock interaction, industrial pollution abatement under tradable permit, seawater cleaning project, respectively. Then in next session we introduce dynamic optimization problem which combines contains two state equations, which correspond to two state variables fish stock and pollution stock , respectively; four control variables industrial production , volume of pollution abatement , volume of sea water cleaning  and catch of fish , respectively. To maximum benefit of fishery, we follow and introduce the optimal solution of four control variables obtained from dynamic optimization.

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