Artificial destratification effects on nitrogen and phosphorus dynamics in a eutrophic impoundment in the northern Great Plains

Balangoda, Anusha

doi:10.1007/s10661-016-5444-7

Cited by 6 publications

(2 citation statements)

References 24 publications

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“…As the water supply source of a city, more and more attention has been turned to reservoirs, lakes and other surface waters. In temperate reservoirs over 10 m deep, a threetiered structure of epilimnion, thermocline and hypolimnion appear in the vertical direction of the water during summer [4][5][6]. The stable stratification impedes the exchange between surface water and the bottom and has remarkable influence on the water's physical and chemical indicators [7].…”

Section: Introductionmentioning

confidence: 99%

Effects of Seasonal Thermal Stratification on Ammonia Nitrogen Transformation in a Source Water Reservoir

2021

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Seasonal thermal stratification has a significant impact on water quality. In this paper, the variation of vertical distribution of ammonia nitrogen in a source water reservoir was studied, on the base of field monitoring data. The dominant factor of the variation in ammonia nitrogen is the anaerobic environment caused by the seasonal thermal stratification, which leads to the degradation of nitrogen-containing organic compounds in the sediments. To determine the rates of ammonia accumulation, an in situ experimental chamber was used. The results showed that, before the formation of thermal stratification in the reservoir, sediments in the bottom of the water have a high tendency to release ammonia; the rates of ammonia accumulation in the overlying water are 40.31–111.41 mg·m−2·d−1. However, thermal stratification causes changes in the physical and chemical properties of the sediment and reduction in the degradability of the nitrogen-containing compound in the sediment. The rates of ammonia accumulation (39.44–44.65 mg·m−2·d−1) after thermal stratification are lower than before. Considering the water pollution hazards caused by seasonal thermal stratification, it is necessary to take corresponding emergency response measures to cope with the possibility of water pollution risk.

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Section: Introductionmentioning

confidence: 99%

Effects of Seasonal Thermal Stratification on Ammonia Nitrogen Transformation in a Source Water Reservoir

2021

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“…In 2011 the aeration system was turned off in July and September. Details of the aeration system are provided in Balangoda (2016).…”

Section: Description Of Study Sitementioning

confidence: 99%

Effect of Diurnal Variation of Dissolved Oxygen in a Eutrophic Polymictic Reservoir

Balangoda¹

2017

American Journal of Environmental Sciences

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Abstract:To evaluate the diurnal and seasonal Dissolved Oxygen (DO) variations and their effects on water quality, a comprehensive study was conducted in a eutrophic polymictic reservoir under artificially aerated and non-aerated conditions. The effect of aeration among sampling locations and along the water column of DO and DO saturation and diurnal variation of DO, water temperature, pH and conductivity was evaluated under aerated and non-aerated conditions. Dissolved oxygen and water temperature exhibited diurnal variations under aerated and non-aerated conditions; however, no notable diurnal variation was observed in conductivity and pH. The anoxic condition was observed in near-bottom waters at night under non-aerated conditions. The diurnal DO concentration at the surface level was higher under non-aerated conditions than aerated conditions. The diurnal DO variation implies that excessive algae and weed growth cause a major impact on DO production and consumption during the day and night, respectively. The DO concentration at different sampling locations revealed that artificial aeration increased DO concentration in the deep portion of the reservoir. However, results showed that the existing aeration system was inadequate to increase the DO concentration in the entire reservoir.

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A critical review on operation and performance of source water control strategies for cyanobacterial blooms: Part II-mechanical and biological control methods

2021

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Artificial destratification effects on nitrogen and phosphorus dynamics in a eutrophic impoundment in the northern Great Plains

Cited by 6 publications

References 24 publications

Effects of Seasonal Thermal Stratification on Ammonia Nitrogen Transformation in a Source Water Reservoir

Effects of Seasonal Thermal Stratification on Ammonia Nitrogen Transformation in a Source Water Reservoir

Effect of Diurnal Variation of Dissolved Oxygen in a Eutrophic Polymictic Reservoir

A critical review on operation and performance of source water control strategies for cyanobacterial blooms: Part II-mechanical and biological control methods

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