A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Modeling the Trophic State of Subtropical Reservoir in Southern Brazil
Eutrophication is an environmental imbalance arising from excess nutrients and causing a decrease of water quality. This study assessed the water quality of the Vacacaí Mirim reservoir in the city of Santa Maria, Brazil, according to Brazilian Environmental Standard from 2010–2011, using a numerical model to simulate temperature, dissolved oxygen, 5-day biochemical oxygen demand, ammonium, nitrite-nitrate, ortho-phosphate, total phosphorus, and chlorophyll-. Calibration was performed manually and was found to be satisfactory when the accuracy was checked using mean absolute error and root-mean square error. Extreme case scenarios were proposed to monitor the response of the reservoir to droughts, heavy rainfall, population increases, and wastewater treatment. Simulations show that a 30-day period of dry weather causes the reservoir to become hypereutrophic. Increased precipitation simulation could not translate the interactions that occurred in the environment. Increased pollution load scenarios show that high concentrations of total phosphorus and chlorophyll- change the trophic state of the reservoir to hypertrophic. Simulations of reduced wastewater dumping show that a 66% decrease in dumping volumes considerably improve water quality and the reservoir becomes mesotrophic.
Modeling the Trophic State of Subtropical Reservoir in Southern Brazil
Eutrophication is an environmental imbalance arising from excess nutrients and causing a decrease of water quality. This study assessed the water quality of the Vacacaí Mirim reservoir in the city of Santa Maria, Brazil, according to Brazilian Environmental Standard from 2010–2011, using a numerical model to simulate temperature, dissolved oxygen, 5-day biochemical oxygen demand, ammonium, nitrite-nitrate, ortho-phosphate, total phosphorus, and chlorophyll-. Calibration was performed manually and was found to be satisfactory when the accuracy was checked using mean absolute error and root-mean square error. Extreme case scenarios were proposed to monitor the response of the reservoir to droughts, heavy rainfall, population increases, and wastewater treatment. Simulations show that a 30-day period of dry weather causes the reservoir to become hypereutrophic. Increased precipitation simulation could not translate the interactions that occurred in the environment. Increased pollution load scenarios show that high concentrations of total phosphorus and chlorophyll- change the trophic state of the reservoir to hypertrophic. Simulations of reduced wastewater dumping show that a 66% decrease in dumping volumes considerably improve water quality and the reservoir becomes mesotrophic.
Modeling the Trophic State of Subtropical Reservoir in Southern Brazil
Kuchinski, Vinícius (author) / Cauduro Gastaldini, Maria do Carmo (author)
2018-01-04
Article (Journal)
Electronic Resource
Unknown
Modeling the Trophic State of Subtropical Reservoir in Southern Brazil
| British Library Online Contents | 2018
Geochemical Assessment of a Subtropical Reservoir: A Case Study in Curitiba, Southern Brazil
| Online Contents | 2012
Analysis of the Trophic State of Codette Reservoir
| British Library Conference Proceedings | 1994
Total volatile solids may aid in trophic state assessment in subtropical reservoirs
| Online Contents | 2013