Abstract
An in-depth study of the temporal and spatial distribution of pollution loads can assist in the development of water pollution remediation. The research scope of this paper was the highly developed Wuhu City located south of the Yangtze River. Chemical oxygen demand (COD), NH3-H, and total phosphorus (TP) were chosen as the pollutant research objects of this study. Then, by combining the natural and social conditions within the scope of the study, a balanced system of pollution load generation and migration was described. A pollution load model of Wuhu City based on Load Calculator, MIKE 11, and ArcGIS was established. The results indicate that, in terms of the time distribution, the changes in the influx of the different pollutants were consistent. In terms of the spatial distribution, the major contributions to the annual pollution load were domestic pollution, urban surface runoff pollution, and poultry breeding pollution. The major contributors to the annual pollution load into the river were domestic pollution, urban surface runoff pollution, and sewage plant tail water pollution. This analysis provides references for the comprehensive management of local water environments.
Highlights
Aquatic environmental pollution and secondary disasters have become global environmental issues
In China, the quality of the aquatic environment has declined sharply due to the increasing pollution loads (such as ammonia, total phosphorus (TP), and chemical oxygen demand (COD)) from non-point source (NPS) pollution
The results show that the total nitrogen load was much higher than that of the total phosphorus
Summary
Aquatic environmental pollution and secondary disasters have become global environmental issues. Aquatic environmental pollution can be divided into two categories: point source pollution and non-point source (NPS) pollution [1]. Compared with point source pollution, NPS pollution is characterized by an extensive distribution, complicated causes, and control difficulties. NPS pollution has become the primary pollution source in aquatic environments. In China, the quality of the aquatic environment has declined sharply due to the increasing pollution loads (such as ammonia, total phosphorus (TP), and chemical oxygen demand (COD)) from NPS pollution. A comprehensive understanding of the temporal and spatial distribution characteristics of the pollution load would improve regional aquatic environmental treatment
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