IGW-NET allows for simulating reactive decay of a pollutant (1st-order reaction kinetics).
How to use it:
The radio box next to ‘First Decay:’. The rate of reaction can be controlled by assigning a first order decay coefficient (units of 1/day) or a known half-life (days). For the former, select the radio button next to ‘Coefficient ‘ and enter a non-zero value in the provided text box. For the latter, select ‘Half Life’ and enter a non-zero value in the provided text box