Geoscience Reference
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Fig. 2 Optimal values of the dead zone model parameters derived by means of differential
evolution [DE] method for flow rates
Q
2 and
Q
3
Fig. 3 Observed and simulated (differential evolution [DE] method) concentration-time distribu-
tions for flow rate
Q
3
Results obtained by DE method were evaluated by applying a coefficient of
determination
R
2
. The coefficient of determination
R
2
was derived for eight simulated
breakthrough curves. The obtained values are between 0.991 and 0.999, which means
that obtained parameter sets give acceptable results (
R
2
ΒΌ
1 for a perfect fit).