scholarly journals Water Quality, Cyanobacteria, and Environmental Factors and Their Relations to Microcystin Concentrations for Use in Predictive Models at Ohio Lake Erie and Inland Lake Recreational Sites, 2013-14

2015 ◽  
Author(s):  
Donna S. Francy ◽  
Jennifer L. Graham ◽  
Erin A. Stelzer ◽  
Christopher D. Ecker ◽  
Amie M.G. Brady ◽  
...  
Keyword(s):  
Water Quality ◽  
Environmental Factors ◽  
Predictive Models ◽  
Lake Erie ◽  
Inland Lake

scholarly journals Predictive Models for Escherichia coli Concentrations at Inland Lake Beaches and Relationship of Model Variables to Pathogen Detection

2013 ◽  
Vol 79 (5) ◽  
pp. 1676-1688 ◽  
Author(s):  
Donna S. Francy ◽  
Erin A. Stelzer ◽  
Joseph W. Duris ◽  
Amie M. G. Brady ◽  
John H. Harrison ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Water Quality ◽  
Predictive Models ◽  
Pathogen Detection ◽  
Model Performance ◽  
Current Method ◽  
Content Type ◽  
E Coli ◽  
Predictive Variables ◽  
Inland Lake

ABSTRACTPredictive models, based on environmental and water quality variables, have been used to improve the timeliness and accuracy of recreational water quality assessments, but their effectiveness has not been studied in inland waters. Sampling at eight inland recreational lakes in Ohio was done in order to investigate using predictive models forEscherichia coliand to understand the links betweenE. coliconcentrations, predictive variables, and pathogens. Based upon results from 21 beach sites, models were developed for 13 sites, and the most predictive variables were rainfall, wind direction and speed, turbidity, and water temperature. Models were not developed at sites where theE. colistandard was seldom exceeded. Models were validated at nine sites during an independent year. At three sites, the model resulted in increased correct responses, sensitivities, and specificities compared to use of the previous day'sE. coliconcentration (the current method). Drought conditions during the validation year precluded being able to adequately assess model performance at most of the other sites.Cryptosporidium, adenovirus,eaeA(E. coli),ipaH(Shigella), andspvC(Salmonella) were found in at least 20% of samples collected for pathogens at five sites. The presence or absence of the three bacterial genes was related to some of the model variables but was not consistently related toE. coliconcentrations. Predictive models were not effective at all inland lake sites; however, their use at two lakes with high swimmer densities will provide better estimates of public health risk than current methods and will be a valuable resource for beach managers and the public.

scholarly journals Population Characteristics of Brachionus calyciflorus and Their Potential Application for Evaluating River Health in the Pearl River Delta, China

Water ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 749
Author(s):  
Yuan Gao ◽  
Zini Lai ◽  
Chao Wang ◽  
Haiyan Li ◽  
Yongzhan Mai
Keyword(s):  
Water Quality ◽  
Environmental Factors ◽  
Pearl River Delta ◽  
Significant Positive Correlation ◽  
River Delta ◽  
Population Characteristics ◽  
Pearl River ◽  
River Health ◽  
The Pearl River Delta ◽  
The Pearl River

Water pollution can be monitored through the use of indicator species, including Brachionus calyciflorus. To do this, it is necessary to understand the species’ population ecology. Four surveys of zooplankton were conducted in May, August, and December 2018 and February 2019 in the Pearl River Delta, China, to examine the population characteristics of B. calyciflorus. The temporal and spatial distribution of abundance, biomass, dominance, and occurrence frequency were compared with those from 2012 to investigate the relationship between changes in the population of B. calyciflorus and environmental factors. The average abundance, dominance, and occurrence of B. calyciflorus in this survey were significantly higher than those of 2012 in all seasons. Principal component analysis showed that environmental factors such as the temperature, transparency, total nitrogen, and total phosphorus of water had a major impact on the abundance of B. calyciflorus. There was a significant positive correlation with transparency, total nitrogen, and total phosphorus of water, and a very significant positive correlation with water temperature. Overall, these results demonstrated that the distribution characteristics of B. calyciflorus can reflect pollution in water bodies and can be used to evaluate water quality. These research results provide a reference for evaluating China’s river health and can help to manage water quality in the Pearl River Delta.

scholarly journals A study on prediction method for ozone dosage and residual ozone concentration in advanced ozone water treatment

2017 ◽  
Vol 12 (1) ◽  
pp. 87-96 ◽  
Author(s):  
J. S. Hyung ◽  
K. B. Kim ◽  
M. C. Kim ◽  
I. S. Lee ◽  
J. Y. Koo
Keyword(s):  
Water Quality ◽  
Hydrogen Peroxide ◽  
Water Treatment ◽  
Environmental Factors ◽  
Real Time ◽  
Ozone Concentration ◽  
Prediction Method ◽  
Optimum Amount ◽  
Factors Affecting ◽  
Water Treatment Plants

Ozone dosage in most water treatment plants is operated by determining the ozone concentration with the experience of the operation. In this case, it is not economical. This study selected the factors affecting residual ozone concentration and attempted to estimate the optimum amount of hydrogen peroxide dosage for the control of the residual ozone concentration by developing a model for the prediction of the residual ozone concentration. The prediction formulas developed in this study can quickly respond to the environment of water quality and surrounding environmental factors, which change in real time, so it is judged that they could be used for the operation of the optimum ozone process, and the control of ozone dosage could be used as a new method in controlling the concentration of ozone dosage and the concentration of residual ozone.

scholarly journals Variation of Physico -Chemical Parameters from a Butchery Area in Rm. Valcea

2012 ◽  
Vol 69 (2) ◽  
Author(s):  
Diana FLORESCU ◽  
Marius ARICIU ◽  
Diana BOCIU ◽  
Roxana IONETE
Keyword(s):  
Water Quality ◽  
Quality Control ◽  
Air Quality ◽  
Environmental Factors ◽  
Environmental Protection ◽  
Pollutant Emissions ◽  
Waste Incinerator ◽  
Meat Industry ◽  
Monitoring And Control ◽  
Water Quality Control

The European Parliament and Council Regulation no.178/2002 sets the standard for consumer protection and environmental quality assurance relating to a specifi c food in the user market. In order to monitor the environmental factors, the study is focused on meat industry that is expanding rapidly, is an established player and a leader in its market, specifically S.C. Diana S.R.L, Rm.Valcea.Environmental protection, monitoring and controlling environmental factors of pollutant emissions is performed by authorized personnel in laboratories with adequate equipment described in specific standards. Air monitoring should be compliant with Order 462/1993, which also shows the maximum permitted concentrations for each parameter monitored. Parameters monitored of directed emissions into the atmosphere, are made once a week from the waste incinerator stack. For monitoring of ammonia in the refrigeration units, the Order 462/1993 is followed and furthermore authorized staff ensures that emissions do not harm air quality and odours, according to Health Ministry Order 536/1997. Regarding the monitoring of ammonia, which takes part in air quality control, sampling is made weekly by trained personnel.The monitoring and control of water quality parameters, is performed by complying to the drinking water law no. 458/2002. Water quality control implicates weekly examinations of set limit controls. SC Diana Ltd from Rm. -Valcea has not exceeded the required limits during the monitoring performed in this research paper. If limits are exceeded, they must be reported to County Environmental Protection Agency.Unit is obliged to regularly inform the Environmental Protection Authority on monitoring activities carried out.

scholarly journals Observed and Potential Impacts of the COVID-19 Pandemic on the Environment

2020 ◽  
Vol 17 (11) ◽  
pp. 4140 ◽  
Author(s):  
Sorin Cheval ◽  
Cristian Mihai Adamescu ◽  
Teodoro Georgiadis ◽  
Mathew Herrnegger ◽  
Adrian Piticar ◽  
...  
Keyword(s):  
Public Health ◽  
Water Quality ◽  
Environmental Factors ◽  
Environmental Impacts ◽  
Human Activity ◽  
Urban Areas ◽  
Rapid Onset ◽  
Anthropogenic Factors ◽  
The Novel ◽  
Novel Coronavirus

Various environmental factors influence the outbreak and spread of epidemic or even pandemic events which, in turn, may cause feedbacks on the environment. The novel coronavirus disease (COVID-19) was declared a pandemic on 13 March 2020 and its rapid onset, spatial extent and complex consequences make it a once-in-a-century global disaster. Most countries responded by social distancing measures and severely diminished economic and other activities. Consequently, by the end of April 2020, the COVID-19 pandemic has led to numerous environmental impacts, both positive such as enhanced air and water quality in urban areas, and negative, such as shoreline pollution due to the disposal of sanitary consumables. This study presents an early overview of the observed and potential impacts of the COVID-19 on the environment. We argue that the effects of COVID-19 are determined mainly by anthropogenic factors which are becoming obvious as human activity diminishes across the planet, and the impacts on cities and public health will be continued in the coming years.

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