The water pollution source localization is of great significance to water environment protection. In this paper, a study on water\npollution source localization is presented. Firstly, the source detection is discussed. Then, the coarse localization methods and\nthe localization methods based on diffusion models are introduced and analyzed, respectively. In addition, the localization method\nbased on the contour is proposed.The detection and localization methods are compared in experiments finally.The results show that\nthe detection method using hypotheses testing is more stable. The performance of the coarse localization algorithm depends on the\nnodes density.The localization based on the diffusion model can yield precise localization results; however, the results are not stable.\nThe localization method based on the contour is better than the other two localization methods when the concentration contours\nare axisymmetric.Thus, in the water pollution source localization, the detection using hypotheses testing is more preferable in the\nsource detection step. If concentration contours are axisymmetric, the localization method based on the contour is the first option.\nAnd, in case the nodes are dense and there is no explicit diffusion model, the coarse localization algorithm can be used, or else the\nlocalization based on diffusion models is a good choice.
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