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Extra features needed for a better simulation

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The simulation we have considered in this assignment is a very simple one that makes a number of sweeping assumptions, for example

• the rate at which pollutant appears in the reservoir is the same for every part of the reservoir
• the concentration of pollutant is the same everywhere in the reservoir
• the pollutant is only removed by one process, the rate of which depends only on the concentration of the pollutant

These are clearly gross over-simplifications. In a more realistic simulation it would be necessary to allow for many more features. For example, in attempting to simulate the fate of pollutants emitted into the atmosphere is would be necessary to allow for

• the pollutant being emitted into the lower troposphere and gradually diffusing up through the atmosphere
• the concentration of pollutant being different in different parts of the reservoir
• several different methods for the removal of pollutant, for example, gas phase reactions, reactions on the surface of aerosols, dissolution in rain water
• interactions between the main pollutant and any other pollutants present in the reservoir

Such a simulation is beyond the scope of A level chemistry, but this interesting field of study is being actively pursued by many research groups across the World.