Donna Francy (Former Employee)
Science and Products
Filter Total Items: 46
Use of predictive models and rapid methods to nowcast bacteria levels at coastal beaches Use of predictive models and rapid methods to nowcast bacteria levels at coastal beaches
The need for rapid assessments of recreational water quality to better protect public health is well accepted throughout the research and regulatory communities. Rapid analytical methods, such as quantitative polymerase chain reaction (qPCR) and immunomagnetic separation/adenosine triphosphate (ATP) analysis, are being tested but are not yet ready for widespread use. Another solution is...
Authors
Donna S. Francy
Comparison of traditional and molecular analytical methods for detecting biological agents in raw and drinking water following ultrafiltration Comparison of traditional and molecular analytical methods for detecting biological agents in raw and drinking water following ultrafiltration
Aims: To compare the performance of traditional methods to quantitative polymerase chain reaction (qPCR) for detecting five biological agents in large-volume drinking-water samples concentrated by ultrafiltration (UF). Methods and Results: Drinking-water samples (100 l) were seeded with Bacillus anthracis, Cryptospordium parvum, Francisella tularensis, Salmonella Typhi, and Vibrio...
Authors
D.S. Francy, R.N. Bushon, A.M.G. Brady, E.E. Bertke, C.M. Kephart, C.A. Likirdopulos, B.E. Mailot, F. W. Schaefer, H.D. Alan Lindquist
Quality-Assurance Plan for Water-Quality Activities in the USGS Ohio Water Science Center Quality-Assurance Plan for Water-Quality Activities in the USGS Ohio Water Science Center
In accordance with guidelines set forth by the Office of Water Quality in the Water Resources Discipline of the U.S. Geological Survey, a quality-assurance plan has been written for use by the Ohio Water Science Center in conducting water-quality activities. This quality-assurance plan documents the standards, policies, and procedures used by the Ohio Water Science Center for activities...
Authors
Donna S. Francy, Kimberly H. Shaffer
Nowcasting Beach Advisories at Ohio Lake Erie Beaches Nowcasting Beach Advisories at Ohio Lake Erie Beaches
Data were collected during the recreational season of 2007 to test and refine predictive models at three Lake Erie beaches. In addition to E. coli concentrations, field personnel collected or compiled data for environmental and water-quality variables expected to affect E. coli concentrations including turbidity, wave height, water temperature, lake level, rainfall, and antecedent dry...
Authors
Donna S. Francy, Robert A. Darner
Section 5. Procedures for Developing Models To Predict Exceedances of Recreational Water-Quality Standards at Coastal Beaches Section 5. Procedures for Developing Models To Predict Exceedances of Recreational Water-Quality Standards at Coastal Beaches
No abstract available.
Authors
Donna S. Francy, Robert A. Darner
Models for predicting recreational water quality at Lake Erie beaches Models for predicting recreational water quality at Lake Erie beaches
Data collected from four Lake Erie beaches during the recreational seasons of 2004-05 and from one Lake Erie beach during 2000-2005 were used to develop predictive models for recreational water quality by means of multiple linear regression. The best model for each beach was based on a unique combination of environmental and water-quality explanatory variables including turbidity...
Authors
Donna S. Francy, Robert A. Darner, Erin E. Bertke
Science and Products
Filter Total Items: 46
Use of predictive models and rapid methods to nowcast bacteria levels at coastal beaches Use of predictive models and rapid methods to nowcast bacteria levels at coastal beaches
The need for rapid assessments of recreational water quality to better protect public health is well accepted throughout the research and regulatory communities. Rapid analytical methods, such as quantitative polymerase chain reaction (qPCR) and immunomagnetic separation/adenosine triphosphate (ATP) analysis, are being tested but are not yet ready for widespread use. Another solution is...
Authors
Donna S. Francy
Comparison of traditional and molecular analytical methods for detecting biological agents in raw and drinking water following ultrafiltration Comparison of traditional and molecular analytical methods for detecting biological agents in raw and drinking water following ultrafiltration
Aims: To compare the performance of traditional methods to quantitative polymerase chain reaction (qPCR) for detecting five biological agents in large-volume drinking-water samples concentrated by ultrafiltration (UF). Methods and Results: Drinking-water samples (100 l) were seeded with Bacillus anthracis, Cryptospordium parvum, Francisella tularensis, Salmonella Typhi, and Vibrio...
Authors
D.S. Francy, R.N. Bushon, A.M.G. Brady, E.E. Bertke, C.M. Kephart, C.A. Likirdopulos, B.E. Mailot, F. W. Schaefer, H.D. Alan Lindquist
Quality-Assurance Plan for Water-Quality Activities in the USGS Ohio Water Science Center Quality-Assurance Plan for Water-Quality Activities in the USGS Ohio Water Science Center
In accordance with guidelines set forth by the Office of Water Quality in the Water Resources Discipline of the U.S. Geological Survey, a quality-assurance plan has been written for use by the Ohio Water Science Center in conducting water-quality activities. This quality-assurance plan documents the standards, policies, and procedures used by the Ohio Water Science Center for activities...
Authors
Donna S. Francy, Kimberly H. Shaffer
Nowcasting Beach Advisories at Ohio Lake Erie Beaches Nowcasting Beach Advisories at Ohio Lake Erie Beaches
Data were collected during the recreational season of 2007 to test and refine predictive models at three Lake Erie beaches. In addition to E. coli concentrations, field personnel collected or compiled data for environmental and water-quality variables expected to affect E. coli concentrations including turbidity, wave height, water temperature, lake level, rainfall, and antecedent dry...
Authors
Donna S. Francy, Robert A. Darner
Section 5. Procedures for Developing Models To Predict Exceedances of Recreational Water-Quality Standards at Coastal Beaches Section 5. Procedures for Developing Models To Predict Exceedances of Recreational Water-Quality Standards at Coastal Beaches
No abstract available.
Authors
Donna S. Francy, Robert A. Darner
Models for predicting recreational water quality at Lake Erie beaches Models for predicting recreational water quality at Lake Erie beaches
Data collected from four Lake Erie beaches during the recreational seasons of 2004-05 and from one Lake Erie beach during 2000-2005 were used to develop predictive models for recreational water quality by means of multiple linear regression. The best model for each beach was based on a unique combination of environmental and water-quality explanatory variables including turbidity...
Authors
Donna S. Francy, Robert A. Darner, Erin E. Bertke