【类型】期刊
【题名】Effects of nonpoint source pollution from different sources on lake nitrogen and phosphorus: A case study of Chaohu Lake basin.
【作者】 IR Akhundov
【关键词】 redundancy analysis total phosphorus 冗余分析 source Chaohu Lake basin 巢湖流域 non total nitrogen multi 总磷 非点源污染 point source pollution 多来源 总氮
【期刊名】Journal of Agricultural Resources & Environment
【摘要】This study aimed to clarify the impact of different sources of nonpoint source (NPS) pollution on lake nitrogen and phosphorus. This study was based on a redundancy analysis method that comprehensively considered the five major sources of nonpoint source pollution in the Chaohu Lake basin including planting land, livestock and poultry breeding, aquaculture, rural domestic sewage discharge, and atmospheric deposition. The effects of NPS pollution from multiple sources on lake nitrogen and phosphorus were discussed. Additionally, the impact of different sources was analyzed on the two seasons of the normal and wet water periods. The results showed that the influence of nonpoint source pollution on lake nitrogen and phosphorus in the normal period was slightly higher than that in the wet period, and the interpretation rate of nonpoint source pollution in the normal period could reach 80.5%, whereas that in the wet period was 71.6%. Different sources of non-point source pollution showed certain variations during different rainfall periods. The pollution sources with the most obvious difference in their contribution rates were atmospheric deposition and rural domestic sewage discharge, of which the interpretation rate of atmospheric deposition could reach 46.4% in the wet season and only 6.3% in the normal season. The contribution rate of rural domestic sewage discharge showed the opposite trend. However, the total amounts of the two sources exceeded 50% in both the normal and wet seasons. The effects of nonpoint source pollution from planting land, livestock and poultry breeding as well as aquaculture on lake nitrogen and phosphorus were similar; the interpretation rates of the three factors were between 10% and 20% and the change was relatively small between normal and wet water periods. This study has shown that the impact of atmospheric deposition and discharge of rural domestic sewage on the concentrations of nitrogen and phosphorus in lakes is greatly affected by seasonal factors. Agricultural planting, livestock and poultry breeding, and aquaculture, as the three main forms of agricultural production, should be equally prioritized because of their influence on changes in nitrogen and phosphorus concentrations in lakes.
【年份】2023
【ISSN】2095-6819
【页码】64-75
【期号】1
【作者单位】1中国科学院流域地理学重点实验室, 中国科学院南京地理与湖泊研究所, 南京 210008. 2中国科学院大学, 北京100049. 3长春师范大学地理科学学院, 长春130032. 4南京工业大学测绘科学与技术学院, 南京211816.
【期刊卷】40
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