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The SENSOR DDS (Damage Detection System) developed by SENSOR s.r.o. detects leaks in the geomembranes of enclosed waste disposal ponds, basins, water treatment stations, industrial stockages, drainages, pipelines and various industrial installations. The “in site” DDS allows both damage detection and location. In some variations of the system, the movement of underground water and the direction of contaminant plumes may be identified. The system is based on using the flow of electric current to simulate leaking contaminants. Field data are measured as a function of position and time and processed to derive 2-D and 3-D information using software specifically developed for this purpose. Once the location of the membrane damage has been identified, it is then very easy to repair it before any · contamination of the environment can take place.