Dynamic characteristics of net anthropogenic phosphorus input to the upper Yangtze River Basin from 1989 to 2019: Focus on the phosphate ore rich area in China

被引:11
作者
Yang, Junlan [1 ,2 ]
Li, Min [1 ,2 ,5 ]
Liu, Lu [1 ,2 ]
Zhao, Hongjun [1 ,2 ]
Luo, Wenqing [1 ,2 ]
Guo, Yali [3 ,4 ]
Ji, Xiaonan [3 ,4 ]
Hu, Wei [3 ,4 ]
机构
[1] Beijing Forestry Univ, Coll Environm Sci & Engn, Beijing Key Lab Source Control Technol Water Pollu, Beijing 100083, Peoples R China
[2] Beijing Forestry Univ, Coll Environm Sci & Engn, Engn Res Ctr Water Pollut Source Control & Ecoreme, Beijing 100083, Peoples R China
[3] Shanghai Invest Design & Res Inst Co Ltd, Shanghai 200335, Peoples R China
[4] China Three Gorges Corp, YANGTZE Ecoenvironm Engn Res Ctr Shanghai, Shanghai 200335, Peoples R China
[5] Beijing Forestry Univ, Coll Environm Sci & Engn, 35 Qinghua East Rd, Beijing 100083, Peoples R China
基金
中国国家自然科学基金;
关键词
Net anthropogenic phosphorus input; Phosphate ore; Spatiotemporal heterogeneity; Upper Yangtze River basin; NITROGEN; CONSUMPTION; IMPACTS; FLOW; RECOVERY; PATTERN; TRENDS;
D O I
10.1016/j.jenvman.2023.119140
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Phosphorus (P), a non-renewable essential resource, faces heavy exploitation and contributes to eutrophication in aquatic environments. Assessing P input is vital for a healthier P cycle in the Upper Yangtze River (UYR), a phosphate ore rich basin, where P mining and P chemical enterprises have prominent pollution problems. This study modified the net anthropogenic phosphorus input (NAPI) model to include ore mining P input (Pore). We analyzed the evolutionary characteristics of P input in five sub-basins of UYR from 1989 to 2019 using prefecture-level data, and assessed the uncertainty of the data. NAPI in all sub-basins exhibited an upward and then downward trend during 1989-2019, with the inflection point occurring in 2015 or 2016, showing a net increase of about 1.1 times (568-1162 kg P km-2 yr-1) in the whole UYR basin. Among the components of NAPI, P fertilizer inputs (Pfer) and food/non-food and feed P inputs (Pf/nf&feed) contributed comparably, though the growth rate of Pfer was most notable basin-wide. Pore proportion increased significantly (about 3-fold), with a peak of 20%, especially in Wujiang sub-basin. The multi-year (1989-2019) average NAPI in UYR rose sequentially from west to east, with hotspot areas mainly concentrated in the Sichuan-Chongqing urban agglomeration and cities of Hubei province. The regional P input closely related to the population density and the level of agricultural development, certainly the phosphate mining was also unignorable. This study emphasizes that based on current status of NAPI development in UYR, targeted management for different regions should focus on improving agricultural P use efficiency and rational exploitation of P mineral resources.
引用
收藏
页数:11
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