中国地理科学 ›› 2016, Vol. 26 ›› Issue (5): 679-686.doi: 10.1007/s11769-016-0828-8

• 论文 • 上一篇    下一篇

Variations of Dissolved Iron in the Amur River During an Extreme Flood Event in 2013

YAN Baixing1, GUAN Jiunian2, Vladimir SHESTERKIN3, ZHU Hui1   

  1. 1. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sci-ences, Changchun 130102, China;
    2. School of Environment, Northeast Normal University, Changchun 130024, China;
    3. Institute of Water and Ecology Problems, Far Eastern Branch, Russian Academy of Sciences, Khabarovsk 680000, Russia
  • 收稿日期:2015-12-25 修回日期:2016-03-19 出版日期:2016-10-27 发布日期:2016-08-25
  • 通讯作者: YAN Baixing.E-mail:yanbx@neigae.ac.cn E-mail:yanbx@neigae.ac.cn
  • 基金资助:

    Under the auspices of National Natural Science Foundation of China (No. 41271499, 41471406)

Variations of Dissolved Iron in the Amur River During an Extreme Flood Event in 2013

YAN Baixing1, GUAN Jiunian2, Vladimir SHESTERKIN3, ZHU Hui1   

  1. 1. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sci-ences, Changchun 130102, China;
    2. School of Environment, Northeast Normal University, Changchun 130024, China;
    3. Institute of Water and Ecology Problems, Far Eastern Branch, Russian Academy of Sciences, Khabarovsk 680000, Russia
  • Received:2015-12-25 Revised:2016-03-19 Online:2016-10-27 Published:2016-08-25
  • Contact: YAN Baixing.E-mail:yanbx@neigae.ac.cn E-mail:yanbx@neigae.ac.cn
  • Supported by:

    Under the auspices of National Natural Science Foundation of China (No. 41271499, 41471406)

摘要:

As a key factor limiting primary productivity in marine ecosystem, dissolved iron (DFe) export from fluvial systems has increased recently. There is particular concern about discharges of DFe during extreme flooding, when they are thought to increase considerably. An extreme flood event that caused inundation of extensive areas of Far Eastern Russia and Northeastern China occurred in the basin of the Amur River during summer and autumn 2013. During this event, water samples were collected in the middle reaches of the Amur River and the lower reaches at Khabarovsk City and analyzed for DFe concentrations and other aquatic parameters. The results show that the average DFe concentrations in the middle reaches of the Amur River (right bank) and at Khabarovsk were 1.11 mg/L and 0.32 mg/L, respectively, during the extreme flood in 2013. The total discharge of DFe during the flood event was 6.25×104 t. The high discharge of DFe during the flood reflects the elevated discharge of the river, hydrologically connected riparian wetlands, vast quantities of terrestrial runoff, and flood discharges from the Zeya and Bureya reservoirs. These results show that long-term monitoring is needed to identify and assess the impacts of DFe transport on the downstream reaches, estuarine area, and coastal ecosystems of the Amur River.

关键词: dissolved iron, dissolved organic matter, extreme flooding event, land use, the Amur River, wetland

Abstract:

As a key factor limiting primary productivity in marine ecosystem, dissolved iron (DFe) export from fluvial systems has increased recently. There is particular concern about discharges of DFe during extreme flooding, when they are thought to increase considerably. An extreme flood event that caused inundation of extensive areas of Far Eastern Russia and Northeastern China occurred in the basin of the Amur River during summer and autumn 2013. During this event, water samples were collected in the middle reaches of the Amur River and the lower reaches at Khabarovsk City and analyzed for DFe concentrations and other aquatic parameters. The results show that the average DFe concentrations in the middle reaches of the Amur River (right bank) and at Khabarovsk were 1.11 mg/L and 0.32 mg/L, respectively, during the extreme flood in 2013. The total discharge of DFe during the flood event was 6.25×104 t. The high discharge of DFe during the flood reflects the elevated discharge of the river, hydrologically connected riparian wetlands, vast quantities of terrestrial runoff, and flood discharges from the Zeya and Bureya reservoirs. These results show that long-term monitoring is needed to identify and assess the impacts of DFe transport on the downstream reaches, estuarine area, and coastal ecosystems of the Amur River.

Key words: dissolved iron, dissolved organic matter, extreme flooding event, land use, the Amur River, wetland