Simulation of sudden benzene leakage water pollution events

Abstract

Sudden water pollution incidents in rivers occur frequently, which has a serious impact on the ecological environment and residents’ lives. After the sudden water pollution incident, determining the scale of the damage caused by the river water pollution event plays an important role in properly handling the accident. In this paper, the 3EWATER “hydrodynamic-water quality” numerical simulation system is used to simulate the concentration change of a certain pollutant in the river section during a certain period of time and realizes the visual expression of the simulation process. By simulating the sudden benzene leakage event in the Qin River, it was found that when the concentration of the leaked pollutant was 7*10-3kg/m3, the concentration of benzene into the section of Yellow River reached a peak of 1.236mg/L after about 14 hours of leakage, and then began to decrease; after 20 hours of leakage, the concentration of pollutants dropped to the safe concentration of water; the pollutants moved from upstream to downstream in the form of “pollutant band” in the corresponding study area; The highest concentration of pollutants is near the center of the “pollutant band”. The results of this case have strong practical value and provide decision-making basis for water environment planning management,water pollution prevention and emergency response to sudden water pollution incidents.