Donna Francy
Science and Products
USGS Study Identifies Factors Related to Cyanobacterial Harmful Algal Blooms
U.S. Geological Survey (USGS) scientists identified water-quality and environmental factors related to cyanobacterial harmful algal blooms at beaches in Ohio. This information was collected as part of a long-term plan to develop site-specific predictive models for microcystin concentrations.
Developing and Implementing Predictive Models for Estimating Recreational Water Quality at Great Lakes Beaches
The Great Lakes Restoration initiative (GLRI) template #77 (Beach Recreation Water Quality) in cooperation with 23 local and state agencies expanded the use of predictive modeling at 45 beaches throughout the Great Lakes (fig 1). Local agencies measure fecal-indicator bacteria such as Escherichia coli (E. coli.) along with easily obtained environmental variables used as surrogates to estimate...
Real-time assessments of water quality—A nowcast for Escherichia coli and cyanobacterial toxins
Threats to our recreational and drinking waters include disease-causing (pathogenic) organisms from fecal contamination and toxins produced by some species of cyanobacteria (cyanotoxins) that can cause acute and (or) chronic illnesses. Because traditional laboratory methods for detecting these threats take too long for prompt public health...
Francy, Donna S.; Brady, Amie M.; Zimmerman, Tammy M.