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

Zhang P, Pang Y, Pan H, Shi C, Huang Y, Wang J - Int J Environ Res Public Health (2015)

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China. zhap2014@163.com.

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)Ÿs(-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.

No MeSH data available.


Related in: MedlinePlus

Temporal evolutions of the water level (mg·L−1—grey) and DO (mg·L−1—black) contents at Wenshanli (a) and Baiyantan (b) from 3–8 August 2012. Data frequency was three hours.
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ijerph-12-09357-f007: Temporal evolutions of the water level (mg·L−1—grey) and DO (mg·L−1—black) contents at Wenshanli (a) and Baiyantan (b) from 3–8 August 2012. Data frequency was three hours.

Mentions: Further evidence of an urban impact on the Minjiang River in summer comes from DO variations throughout tidal cycles, which show different timing at Wenshanli and Baiyantan. Figure 7 shows, as an example, three hours raw data of DO concentration, the water level from the 1–8 August, 2012 at Webshanli and Baiyantan. Discharge of the Wenshanli was relatively constant between 499 and 651 m3·s−1 during this period, and the lowest DO concentration recorded was 2.52 mg·L−1 in Wenshanli. The water level varied from 2.20–5.97 m at Wenshanli and from 0.89–5.72 m at Baiyantan. The temperature was 27.7 °C–31.8 °C at both stations (not shown), without significant difference between stations.


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

Zhang P, Pang Y, Pan H, Shi C, Huang Y, Wang J - Int J Environ Res Public Health (2015)

Temporal evolutions of the water level (mg·L−1—grey) and DO (mg·L−1—black) contents at Wenshanli (a) and Baiyantan (b) from 3–8 August 2012. Data frequency was three hours.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4555285&req=5

ijerph-12-09357-f007: Temporal evolutions of the water level (mg·L−1—grey) and DO (mg·L−1—black) contents at Wenshanli (a) and Baiyantan (b) from 3–8 August 2012. Data frequency was three hours.
Mentions: Further evidence of an urban impact on the Minjiang River in summer comes from DO variations throughout tidal cycles, which show different timing at Wenshanli and Baiyantan. Figure 7 shows, as an example, three hours raw data of DO concentration, the water level from the 1–8 August, 2012 at Webshanli and Baiyantan. Discharge of the Wenshanli was relatively constant between 499 and 651 m3·s−1 during this period, and the lowest DO concentration recorded was 2.52 mg·L−1 in Wenshanli. The water level varied from 2.20–5.97 m at Wenshanli and from 0.89–5.72 m at Baiyantan. The temperature was 27.7 °C–31.8 °C at both stations (not shown), without significant difference between stations.

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China. zhap2014@163.com.

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)Ÿs(-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.

No MeSH data available.


Related in: MedlinePlus