Abstract
The water body in Yellow river has poor ability to dilute and degrade pollutants during non-flood season due to less upstream inflow, which leads to pollution during non-flood season more serious than flood season. In order to evaluate the transport process of point source pollutants in the lower reaches of the Yellow River during non-flood season, a plain two-dimensional water quality mathematical model was established to simulate the horizontal and vertical propagation range of pollutants such as COD and petroleum below the outfall. Analysis of the migration regulation of pollutants in the river was performed. The results indicated that in the case without external pollution, the influence range of the emission of point source pollution during non-flood season is a certain range downstream of the sewage outlet. The concentration of pollutants at the outlet side is greater than that the other side until the distribution of pollutants across the section tends to be consistent, which provides technical support for assessing the impact of point source pollution on water environment during non-flood season.
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