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| 不同来源的非点源污染对湖泊氮磷浓度的影响——以巢湖流域为例 |
| Effects of nonpoint source pollution from different sources on lake nitrogen and phosphorus： A case study of Chaohu Lake basin |
| Received:December 01, 2021 |
| DOI：10.13254/j.jare.2021.0838 |
| 中文关键词: 非点源污染，多来源，总氮，总磷，冗余分析，巢湖流域 |
| 英文关键词: non-point source pollution, multi-source, total nitrogen, total phosphorus, redundancy analysis, Chaohu Lake basin |
| 基金项目:国家重点研发计划（2018YFD1100105）；中国科学院战略性A类先导科技专项（XDA23020202） |
| Author Name | Affiliation | E-mail | | FENG Xuejiao | Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | LIN Chen | Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China | clin@niglas.ac.cn | | XIONG Junfeng | Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China | | | CHEN Xi | Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
School of Geographical Sciences, Changchun Normal University, Changchun 130032, China | | | WU Zijing | Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
School of Geomatics Science and Technology, Nanjing Tech University, Nanjing 211816, China | | | MA Ronghua | Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China | |
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| 中文摘要: |
| 为明确非点源污染中不同污染源对湖泊氮磷的影响，基于冗余分析方法，综合考虑了巢湖流域非点源污染中种植地、畜禽养殖、水产养殖、农村生活污水排放和大气沉降五大来源，探讨了非点源污染多来源对湖泊氮磷浓度的影响，同时，在平水期和丰水期两个季节分析不同来源的影响差异。结果表明：平水期非点源污染对湖泊氮磷浓度的影响略高于丰水期，平水期解释率可达到80.5%，丰水期为71.6%，且不同来源的影响在平水期和丰水期具有一定的差异。影响差异最明显的污染源是大气沉降和农村生活污水排放，其中，大气沉降在丰水期的解释率可高达46.4%，而在平水期仅为6.3%，农村生活污水排放的解释率恰好相反，但两者总和在平水期和丰水期均超过50%。种植地、畜禽养殖、水产养殖产生的非点源污染对湖泊氮磷浓度的影响作用相当，三者解释率都在10%~20%之间，且在平水期和丰水期变化相对较小。研究表明，大气沉降和农村生活污水排放对湖泊氮磷浓度的影响受季节因素影响较大，而农业种植、畜禽养殖和水产养殖作为农业生产的三种主要形式，其对湖泊氮磷浓度的影响应得到同等程度的重视。 |
| 英文摘要: |
| 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. |
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