globalchange  > 气候变化与战略
DOI: 10.1016/j.jhydrol.2019.124428
论文题名:
Modeling nitrogen export from 2539 lowland artificial watersheds in Lake Taihu Basin, China: Insights from process-based modeling
作者: Huang J.; Cui Z.; Tian F.; Huang Q.; Gao J.; Wang X.; Li J.
刊名: Journal of Hydrology
ISSN: 221694
出版年: 2020
卷: 581
语种: 英语
英文关键词: Global climate change ; Nitrogen ; Polder ; Taihu
Scopus关键词: Aquatic ecosystems ; Climate models ; Decision making ; Eutrophication ; Lakes ; Nitrogen ; Nitrogen fertilizers ; Population statistics ; Watersheds ; Agricultural activities ; Ecosystem degradation ; Global climate changes ; High population density ; Polder ; Process-based modeling ; Scenario simulations ; Taihu ; Climate change ; climate change ; decision making ; eutrophication ; global climate ; nitrogen ; watershed ; China ; Taihu Basin ; Taihu Lake
英文摘要: Excess nitrogen (N) poses a risk of aquatic eutrophication and ecosystem degradation to downstream areas. However, it is poorly investigated in lowland artificial watersheds (polders) due to their complex hydrological processes. This study investigated the N export and retention at all 2539 polders in Lake Taihu Basin, China using a nitrogen dynamic model (NDP), specially developed for polders. The response of N export to global climate change (air temperature and precipitation) and human activities (N fertilization) in the future (2014–2049) were quantified through scenario simulations. The simulation results revealed that these polders have a larger N export coefficient (a spatially-averaged value of 15.3 kg N/ha/yr) than that of non-polder areas (∼6.7 kg N/ha/yr) mainly due to their intensive agricultural activities and high population density. However, these polders also showed considerable N retention with estimated retention rates of 52.7–54.6%. In model results from the future (2014–2049), human activities (N fertilization) determined the magnitude of polder N export, while global climate change determined the fluctuation of polder N export. The estimation of polder N sources, sinks and retention capacity at a watershed scale can be used to identify the hotspot of N loss, and thus guide decision-making to control N loss. © 2019 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159437
Appears in Collections:气候变化与战略

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作者单位: Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing, 210008, China; Center for Eco-Environment Research, Nanjing Hydraulic Research Institute, Nanjing, 210098, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang, 330022, China; Changzhou Hydrology and Water Resources Investigation Bureau, 1 Xingye Roa, Changzhou, 213022, China

Recommended Citation:
Huang J.,Cui Z.,Tian F.,et al. Modeling nitrogen export from 2539 lowland artificial watersheds in Lake Taihu Basin, China: Insights from process-based modeling[J]. Journal of Hydrology,2020-01-01,581
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