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

Peng Zhang, Yong Pang, Hongche Pan, Chengchun Shi, Yawen Huang and Jianjian Wang
Additional contact information
Peng Zhang: College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
Yong Pang: College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
Hongche Pan: College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
Chengchun Shi: Fuzhou Research Academy of Environmental Sciences, 32 Jinjishan Road, Fuzhou 350013, China
Yawen Huang: College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
Jianjian Wang: College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China

IJERPH, 2015, vol. 12, issue 8, 1-18

Abstract: 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 m 3 ?s ?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.

Keywords: hypoxia; dissolved oxygen; oxygen depletion; water resources security; Minjiang River Estuary (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
https://www.mdpi.com/1660-4601/12/8/9357/pdf (application/pdf)
https://www.mdpi.com/1660-4601/12/8/9357/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:12:y:2015:i:8:p:9357-9374:d:54006

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

More articles in IJERPH from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().