Current Density Limit of DC Grounding Facilities Considering Impact on Zebrafish (Brachydanio rerio)

Grounding facilities, including high-voltage DC grounding electrodes and auxiliary anodes in impressed current cathodic protection systems, inject into the ground. This study developed an experimental platform to determine safe limit of density for such facilities through analysis fish behavior on platform. Zebrafish (Brachydanio rerio) were selected experiment placed a tank; two rod used direct water. A wireless camera was focused water tank video record possible changes behavior. The output voltage power source varied, trajectories under various fields recorded. tracking program analyze quantify fish. new method combining samples with results calculations proposed. Results demonstrated that zebrafish could sense turn when exposed certain densities. intensity at turning points statistically analyzed, threshold which no longer tolerate turned 0.4231 A/m2.