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1、冰封期水动力水质模型在松花江水污染事件中的应用AbstractIn recent years, water pollution has become a major environmental problem that threatens the ecological balance and human health. The Songhua River, located in northeastern China, has been facing continuous water pollution incidents, leading to severe environmental and
2、 economic losses. Therefore, it is necessary to conduct a comprehensive analysis of the water dynamics, pollutant transport, and water quality in the Songhua River. In this study, we developed an ice-covered water dynamics and water quality model to investigate water pollution incidents in the Songh
3、ua River during the ice period. The model was successfully applied to simulate the water hydrodynamics and pollutant transport in the Songhua River, and the results were in good agreement with the observed data. With the proposed modeling framework, we were able to gain insights into the sources of
4、pollutants, the transport of pollutants, and their environmental impacts. Our models accurately predicted the spreading patterns of pollutants and their potential hazards to the surrounding environment.IntroductionWater pollution is one of the major environmental challenges faced by the world today.
5、 The Songhua River, located in northeastern China, has been contaminated with various pollutants, including heavy metals, organics, and pesticides. The pollution incidents in the Songhua River have severe environmental and economic consequences, such as the shutdown of water supply systems, negative
6、 impacts on agriculture, and damage to the ecosystem. Therefore, it is essential to develop effective modeling tools for the identification and management of the sources of pollutants, the transport and fate of pollutants, and the impacts of pollutants on the rivers water quality.The objective of th
7、is study was to develop a comprehensive water dynamics and water quality model during the ice period of the Songhua River. Our model provides a systematic approach to investigate the pollutant transport and environmental impacts caused by water pollution incidents in the Songhua River. With the prop
8、osed modeling framework, we aimed to gain insights into the sources of pollutants, their transport and fate, and their impacts on water quality and ecological balance.Model DevelopmentThe modeling framework consisted of two main components: the hydraulic model and the water quality model. The hydrau
9、lic model was developed using the MIKE21 software package based on the finite difference method. The model simulated the water dynamics of the Songhua River during the ice period. The model was validated by the field measurements, which were collected during the ice cover period. The water quality m
10、odel was developed using the same software package and simulated the behavior of organic pollutants in the river.The water quality model takes into account the physical and chemical interactions of various pollutants with water, including adsorption, desorption, deposition, and resuspension. The mod
11、el also considered the effects of temperature, pH, and dissolved oxygen on the behavior of organic pollutants in the river. The model was validated by comparing the model predictions with the measured water quality data.Model Results and DiscussionsOur model results showed that the ice-covered water
12、 dynamics significantly affected the pollutant transport and fate in the Songhua River. During the ice cover period, the water flow was confined to the narrow channel of the Songhua River, leading to the accumulation and retention of pollutants in specific locations. The model results showed that th
13、e pollutant concentration increased significantly in the vicinity of the pollutant discharge points, indicating that the discharges were the primary source of pollutants in the river.Furthermore, the model results indicated that the transport and fate of pollutants were controlled by both the hydrau
14、lic and water quality processes. The interactions between water flow and pollutant behavior were complex and influenced by the properties of the pollutants and the rivers hydrodynamics. The model was able to simulate the pollutant concentration patterns, and the results were in good agreement with t
15、he measured data.ConclusionsIn this study, we developed a comprehensive water dynamics and water quality model to investigate the water pollution incidents in the Songhua River during the ice period. Our model successfully simulated the hydraulic and water quality processes of the Songhua River and
16、provided insights into the pollutant sources, transport and fate, and environmental impacts. With the proposed modeling framework, we were able to identify the primary pollution sources and estimate the potential risks of water pollution incidents. The results of this study provide a valuable tool for water resource management and environmental risk assessment in the Songhua River basin.Based on the results of our modeling framework, we can dra
