| 基于SWAT模型的典型农业小流域氮污染时空分布特征及关键源解析 |
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| 引用本文： | 王慧勇,遆超普,王良杰,董磊,夏永秋,颜晓元.基于SWAT模型的典型农业小流域氮污染时空分布特征及关键源解析[J].湖泊科学,2022,34(2):517-527. |
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| 作者姓名： | 王慧勇 遆超普 王良杰 董磊 夏永秋 颜晓元 |
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| 作者单位： | 南京林业大学南方现代林业协同创新中心,南京210037;中国科学院南京土壤研究所,土壤与农业可持续发展国家重点实验室,江苏常熟农田生态系统国家野外科学观测研究站,南京210008;中国科学院南京土壤研究所,土壤与农业可持续发展国家重点实验室,江苏常熟农田生态系统国家野外科学观测研究站,南京210008;南京林业大学南方现代林业协同创新中心,南京210037 |
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| 基金项目： | 国家自然科学基金项目（41961124004,42061124001）资助. |
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| 摘 要： | 水资源恶化、水体富营养化严重威胁生态环境健康,农业活动所产生的氮是造成水污染的主要原因之一.本研究以句容水库农业流域为研究对象,基于实地监测数据验证了SWAT模型模拟当地氮污染的适用性,并分析了氮素负荷的时空分布特征及其关键源.结果 表明:硝态氮(NO3-N)和总氮(TN)的年均入库量分别为9.98和27.22 t.时...
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| 关 键 词： | SWAT模型 氮素负荷 时空特征 关键源 句容水库 农业流域 |
| 收稿时间： | 2021/5/13 0:00:00 |
| 修稿时间： | 2021/8/2 0:00:00 |
Spatiotemporal distribution characteristics and key sources of nitrogen pollution in a typical agricultural watershed based on SWAT model |
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| Wang Huiyong,Ti Chaopu,Wang Liangjie,Dong Lei,Xia Yongqiu,Yan Xiaoyuan.Spatiotemporal distribution characteristics and key sources of nitrogen pollution in a typical agricultural watershed based on SWAT model[J].Journal of Lake Science,2022,34(2):517-527. |
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| Authors: | Wang Huiyong Ti Chaopu Wang Liangjie Dong Lei Xia Yongqiu Yan Xiaoyuan |
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| Institution: | Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing 210037, P. R. China;Changshu National Agro-Ecosystem Observation and Research Station, State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, P. R. China |
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| Abstract: | The deterioration of water resources and surface water eutrophication threaten the health of the ecological environment seriously. Nitrogen (N) pollution from agricultural activities is an important source of water pollution. In this study, the Jurong Reservoir agricultural watershed was taken as the research object, and the local applicability of the SWAT model for N pollution was validated based on field monitoring data. In addition, the spatial and temporal distribution characteristics of N load and key pollution sources were analyzed. During the monitoring period, the annual N load showed an "M" type fluctuation trend, with a high N load occurred in the flood season from June to September, which accounted for more than 84% of the total N load of the whole year. Moreover, the spatial distribution of nitrate nitrogen (NO3--N) and total nitrogen(TN) load showed a trend of "local concentration, adjacent to water body", mainly concentrated in the area with a high proportion of farmland. Farmland fertilizer is the main source of TN load in this watershed, contributing to 49.60% of total N load and the average annual storage capacity of NO3--N and TN was 9.98 t and 27.22 t, respectively. Our results can serve as a theoretical basis for the control of N pollution at the watershed scale. |
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| Keywords: | SWAT model nitrogen load spatiotemporal characteristics key sources Jurong Reservoir agricultural watershed |
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