期刊
WATER RESOURCES
卷 38, 期 4, 页码 512-521出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0097807811020096
关键词
hypoxia; eutrophication; Amur Bay; Razdol'naya River
资金
- Russian Foundation for Basic Research [08-05-00696-a]
Seasonal variations in biogenic substances (nitrates, nitrites, ammonium, phosphates, and silicates), dissolved oxygen, dissolved organic matter, chlorophyll, humus, and suspended matter at seven stations on the Razdol'naya River are examined. Based on seasonal variations, the local sources of river water pollution by biogenic substances were identified. The annual and daily fluxes of biogenic substances through the Razdol'naya River into Amur Bay are calculated. A diffuse pollution source-agricultural fields in river valley-are shown to be the main source of biogenic substance fluxes. The vast hypoxia in the bottom water of Amur Bay, detected by the authors in 2007 and 2008, is supposed to be mostly caused by floods on the Razdol'naya R., which create favorable conditions of water blooming in Amur Bay in summer. The biomass of dead phytoplankton, experiencing microbiological decomposition and oxidation, causes hypoxia of bottom waters in the bay.
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