4.7 Article

Anthropogenic impacts on nutrient variability in the lower Yellow River

期刊

SCIENCE OF THE TOTAL ENVIRONMENT
卷 755, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.scitotenv.2020.142488

关键词

Nutrients; Compositions and fluxes; Environmental and societal impacts; Yellow River

资金

  1. National Key Research and Development Program of China [2016YFA0600902]
  2. National Natural Science Foundation of China [U1806211]
  3. Taishan Scholars Program of Shandong Province
  4. Aoshan Talents Program - Qingdao National Laboratory for Marine Science and Technology [2015ASTP-OS08]

向作者/读者索取更多资源

Research conducted on nutrient alterations in the Yellow River environment revealed changing trends in concentrations of various nutrients, with some increasing and others decreasing. Suggestions for reducing nutrient discharges were proposed based on the findings.
Excessive nutrient discharges and changes in nutrient ratios caused by global change and anthropogenic activities have been reported in global rivers; however, the actual alterations occurring in the Yellow River environment is too fast to catch up with. From 2001 to 2018, dissolved inorganic nitrogen (DIN), dissolved inorganic phosphorus (DIP) and dissolved silicon (DSi) concentrations showed decreasing trends in the lower Yellow River throughout the study period. Dissolved organic phosphorus (DOP) concentrations increased since 2009, reaching up to 95% of the total dissolved phosphorus. Annual minimum dissolved organic nitrogen concentrations increased with time. We observed extremely low nutrient concentration events since 2014 in response to the retention effect of large reservoirs; this significantly reduced the downstream water discharge and sediment load and increased phytoplankton uptake. To further analyze the variability of nutrient fluxes, we quantified the fluxes to the Yellow River from natural (runoff, precipitation deposition, and sediment load from the Loess Plateau), anthropogenic (recharged water, fertilizer application, and vegetation coverage), social and industrial (population urbanization, GDP, and sewage effluents) sources. The highest contributions of total nutrient fluxes emptied into the Yellow River was fertilizer losing (44-48%) for DIN, sewage effluents (85-88%) for DIP, and runoff (35-65%) for DSi, respectively. Strictly controlling the amount of fertilizer and improving the application methods, improving sewage treatment technology, and vigorously promoting green travel might reduce nutrients emptied into the Yellow River based on the main sources of nutrients. Our study may help policy makers formulate strategies and it is possible to own a better water quality in the Yellow River. (C) 2020 Elsevier B.V. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据