Abstract
The monitoring data of chemical oxygen demand and NH3-N in the upper and lower sections of Jiamusi City in Songhua River were analyzed, and the law of water quality change in Songhua River in Jiamusi City was explored. Based on the simulation results of MIKE11 model for the water from the interval, the minimum ecological safety distance of the upper and lower reaches of Songhua River in Jiamusi city is predicted. Between the rainy season and the standard water period, the Jiamusi section meets the minimum ecological safety distance between Tangyuan County and there is no minimum safety distance during the dry season. The MIKE11 model has good adaptability to the diffusion simulation of pollutants in the upper and lower reaches of the Songhua River in Jiamusi and can be used as an evaluation basis for analyzing the impact of the water quality of the sewage outlet of the river.
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