Table 3 Recovering concentration’s error for different number of observations (\(t_1=45\) days, \(t_f=25\) days and \(l_1=5\) days).

From: Identification of aquifer pollution’s point sources with the reciprocity principle

Observations’ number

364

182

91

20

Computed \(C_s[{\text {kg/m}}^3]\)

0.964

0.89

1.19

1.27

Relative error (%)

3.6

11

19

27

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