#dissolved oxygen

[mbimphblog]

DETERMINATION OF WATER STANDARDS OF UPPER LAKE, BHOPAL, INDIA | UTTAR PRADESH JOURNAL OF ZOOLOGY

The present investigation was carried out to determine the water quality of Upper Lake in Bhopal. Upper Lake is extremely important for fisheries, drinking water, tourism and recreation, trapping, wildlife habitat, science, and education. The water samples were taken from the Upper Lake's surface between March 2019 and February 2020, covering the summer, monsoon, and winter seasons. Standard methods were used to determine the degree of degradation in water quality using physico-chemical parameters such as dissolved oxygen (DO2), total alkalinity, total hardness, calcium hardness, magnesium hardness, turbidity, pH, and temperature. The findings revealed that there is little variance in physico-chemical parameters across three seasons in the upper lake, with the majority of water parameters being in favourable conditions for fish growth and health but not suitable for human consumption. Please see the link :- https://mbimph.com/index.php/UPJOZ/article/view/2056

[rjzimmerman]

Oxygen Loss in Canada Linked to Climate Change

As oxygen loss grows near one of the world's richest fishing grounds, oceanographers are linking the change to human-triggered global warming.

Excerpt:

Oceanographers have identified an act of slow suffocation, as oxygen loss grows near one of the world's richest fishing grounds, and are linking the change to human-triggered global warming.

They have measured a dramatic drop in levels of dissolved oxygen deep in the Gulf of St Lawrence, in eastern Canada, and they link this increasing strangulation to shifts—connected to climate change driven by ever higher ratios of carbon dioxide in the atmosphere, as a consequence of the profligate burning of coal, oil and natural gas—in the Gulf Stream and the Labrador Current.

As carbon dioxide and other greenhouse gas levels have risen in the past 100 years, the Gulf Stream has shifted northward, and the Labrador Current has weakened. As a consequence, according to new research in Nature Climate Change, more warm, salty and oxygen-depleted water from the Gulf Stream is getting into one of the world's great waterways.

Lower oxygen levels have already affected the Atlantic wolffish, the researchers say. And the change is a threat to the Atlantic cod, and the Greenland halibut: two of the world's most prized commercial catches.

"Observations in the very inner Gulf of St Lawrence show a dramatic oxygen decline, which is reaching hypoxic conditions, meaning it can't fully support marine life," said Mariona Claret, of the University of Washington, who led the study.

[oaresearchpaper]

Depletion of dissolved oxygen concentration in the river water and its relationship with surface water temperature: A case study

Research revealed that the dissolved oxygen concentration in the Sitalakhyariver has been gradually deteriorated over the last decade and the temperature pattern of river water is also changing gradually. To assess the ecological integrity of river Sitalakya, this study is aimed at determining the relationship among surface water temperature, DO, and COD in the river as they affect each other, particularly to assess whether DO depletion of the river water is occurring due to water temperature changes or for the anthropogenic pollution made to the river. Subsequent to water quality testing for a period of five years following the standards methods in the laboratory, the statistical regression analysis of the concentration of DO in the raw water and the corresponding temperature and also the corresponding COD concentration in the water during the study period was made. The correlation analysis shows a poor relationship between DO and temperature of the raw water. The coefficient of determination is also derived showing R2 value 0.30 indicating a very weak relationship between surface water temperature and dissolved oxygen in this river. The correlation analysis between COD and DO was also made and the coefficient of determination is also derived showing R2 value 0.70 indicating a very good correlation between the two. It is apparent that with the increase of COD concentration in the surface water DO concentration decreases proportionately. These results showed clearly that DO content of this river depend on the organic waste dumped in the river and not surface water temperature.

[biology-geology-beaches-india]

The Scientific Research Notes of S. Sunkavally, Printed Part, Page 52.

Dates unclear, but certainly between 2006-2012.

[oaresearchpaper]

The indiscriminate discharge of sewage, industrial, and a variety of water from human activities progressively alters and pollutes reservoir water. Investigation of the physicochemical in the water of Binday dam showed a fluctuation of phosphate during the months of October, November, and December. Similarly, low temperature was recorded in the months of September and December and nitrite increased during the month of December which failed to meet the Class C waters. Dissolved Oxygen, pH, electrical conductivity, biochemical oxygen demand, and total dissolved solids meet the standard measurement. Significant differences in physicochemical parameters were recorded between upstream and downstream during the months of September, October, November, and December except for DO, BOD, and EC. Fish identifications are exclusively found in the upstream and downstream namely, Oreochromis niloticus, Channa striata, Clarias gariepinus, Yanica hyalosoma, Carangidae sp., Glossogobius sp., and Glossogobius circumspectus classified as native species, and Sarotherodon melatheron and Gambusia affinis classified as invasive species. Fish distribution revealed that Carangidae sp. only thrives in the upstream whereas Gambusia affinis are exclusively found in the downstream.

[oaresearchpaper]

Research revealed that the dissolved oxygen concentration in the Sitalakhyariver has been gradually deteriorated over the last decade and the temperature pattern of river water is also changing gradually. To assess the ecological integrity of river Sitalakya, this study is aimed at determining the relationship among surface water temperature, DO, and COD in the river as they affect each other, particularly to assess whether DO depletion of the river water is occurring due to water temperature changes or for the anthropogenic pollution made to the river. Subsequent to water quality testing for a period of five years following the standards methods in the laboratory, the statistical regression analysis of the concentration of DO in the raw water and the corresponding temperature and also the corresponding COD concentration in the water during the study period was made. The correlation analysis shows a poor relationship between DO and temperature of the raw water. The coefficient of determination is also derived showing R2 value 0.30 indicating a very weak relationship between surface water temperature and dissolved oxygen in this river. The correlation analysis between COD and DO was also made and the coefficient of determination is also derived showing R2 value 0.70 indicating a very good correlation between the two. It is apparent that with the increase of COD concentration in the surface water DO concentration decreases proportionately. These results showed clearly that DO content of this river depend on the organic waste dumped in the river and not surface water temperature.

[uniglobalbusines]

DO Meter

Find the best DO Meter JPB-70A for accurate dissolved oxygen measurement. At Uniglobal Business, explore a range of DO meters with pen-type shapes that are mainly designed to help the user carry out on-site operations. For aquatic, environmental, and industrial applications.

DO Meter: Dissolved Oxygen Measurement for Aquatic & Industrial Use

Find the best DO Meter for accurate Dissolved Oxygen measurement. Explore a range of DO meters for aquatic, environmental, and industrial ap

[uniglobalbusines]

DO Meter

Uniglobal Business is the premier and reliable supplier of high-quality DO Meter, equipped with optical sensor techniques for accurate results. is the most recent high-functioning and high-performance model of our bubble cleaning type DO meters, which has been developed over many years using our knowledge.

DO Meter: Dissolved Oxygen Measurement for Aquatic & Industrial Use

Find the best DO Meter for accurate Dissolved Oxygen measurement. Explore a range of DO meters for aquatic, environmental, and industrial ap