Application of Portable Ultrasound Diagnostic Instrument in Monitoring Granular Pollutants of Water-Soil-Rock Interfaces

The morphology, structure, and migration of granular pollutants in groundwater are significant in protecting water resources and geological disasters. However, it is difficult to monitor granular pollutants' migration and their parasitic environment under a complex groundwater environment. In this paper, a portable ultrasound diagnostic instrument (PUDI) is used to perform the experimental analysis and visual diagnosis of granular pollutants in groundwater environment and their water-soil-rock interfaces. A visual monitoring method is proposed for the real-time monitoring of the granular pollutants between the water-soil-rock interfaces. Results show that the real-time imaging diagnosis, monitoring, and visual analysis of granular pollutants in the groundwater and water-soil-rock interface can be realized by obtaining the ultrasonic images using the PUDI. The regional imaging size, migration path, and potential harm degree of granular pollutants can be obtained through continuous ultrasound imaging experiments and feedback parameters. The imaging accuracy of underwater particulate pollutants is 0.1 mm. The real-time monitor of granular pollutants and their migration can be realized in groundwater, even though the moving speed of granular pollutants is up to 0.1 m/s, and provides a new technical means for the prevention of granular pollution sources and some potential geological hazards.