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Int. J. Environ. Res. Public Health 2015, 12(8), 9357-9374; doi:10.3390/ijerph120809357

Factors Contributing to Hypoxia in the Minjiang River Estuary, Southeast China

College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
Key Laboratory of Integrated Regulation and Resource, Development on Shallow Lakes of Ministry of Education, Hohai University, Nanjing 210098, China
Fuzhou Research Academy of Environmental Sciences, 32 Jinjishan Road, Fuzhou 350013, China
Author to whom correspondence should be addressed.
Academic Editors: Rao Bhamidiammarri and Kiran Tota-Maharaj
Received: 10 June 2015 / Revised: 31 July 2015 / Accepted: 5 August 2015 / Published: 11 August 2015
(This article belongs to the Special Issue Environmental Systems Engineering)
View Full-Text   |   Download PDF [2165 KB, uploaded 11 August 2015]   |  


Dissolved oxygen (DO) is not only a fundamental parameter of coastal water quality, but also an indication of organics decomposed in water and their degree of eutrophication. There has been a concern about the deterioration of dissolved oxygen conditions in the Minjiang River Estuary, the longest river in Fujian Province, Southeast China. In this study, the syntheses effects on DO was analyzed by using a four year time series of DO concentration and ancillary parameters (river discharge, water level, and temperature) from the Fuzhou Research Academy of Environmental Sciences, at three automated stations along the Minjiang River Estuary. Hypoxia occurred exclusively in the fluvial sections of the estuary during the high temperature and low river discharge period and was remarkably more serious in the river reach near the large urban area of Fuzhou. Enhancement of respiration by temperature and discharge of domestic sewage and industrial wastewater, versus regeneration of waters and dilution of pollutant concentration with increased river discharge, which regarded as the dominant antagonist processes that controlled the appearance of seasonal hypoxia. During the high temperature and the drought period, minimal mainstream flow above 700 m3Ÿs−1, reduction of pollutants and forbidding sediment dredging in the South Channel should be guaranteed for strong supports on water quality management and drinking water source protection. View Full-Text
Keywords: hypoxia; dissolved oxygen; oxygen depletion; water resources security; Minjiang River Estuary hypoxia; dissolved oxygen; oxygen depletion; water resources security; Minjiang River Estuary

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhang, P.; Pang, Y.; Pan, H.; Shi, C.; Huang, Y.; Wang, J. Factors Contributing to Hypoxia in the Minjiang River Estuary, Southeast China. Int. J. Environ. Res. Public Health 2015, 12, 9357-9374.

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