Three different scenarios to identify the source are designed for comparison. Scenario 1 and Scenario 2 are set to compare the advantage between the traditional framework which does not consider the uncertainty of the model parameters and the proposed framework in this paper. Scenario 2 and Scenario 3 are used to prove the superiority of the modified MCMC. The mode of the posteriori distribution of is used as a representation of the characteristics of the contamination event. The number of the iteration was set to 50,000 to make these three schemes comparable in the paper. The detailed scenarios are shown in Table 1.