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Full-Text Articles in Pharmacology, Toxicology and Environmental Health
An Analysis Of Water Quality At Orange County, California Beaches, Naomi Meurice
An Analysis Of Water Quality At Orange County, California Beaches, Naomi Meurice
Pomona Senior Theses
Beaches in Southern California are highly recreated by residents and visitors, making beaches socially and economically important. Public health departments in coastal communities are in charge of measuring water quality and ensuring it is safe for users. Research in the past has indicated that beach water quality gets worse after storms, with bacteria levels jumping on the day of a storm and staying high for up to five days. Studies have shown these spikes in bacteria to be associated with storm runoff, with beaches closer to runoff discharge locations experiencing more impact. However, prior research has not considered the period …
Bacterial Water Quality Monitoring As Citizen Science In Congaree National Park, South Carolina, Shea Mccarthy
Bacterial Water Quality Monitoring As Citizen Science In Congaree National Park, South Carolina, Shea Mccarthy
Theses and Dissertations
Congaree National Park aims to preserve its natural and cultural resources while protecting these benefits for current and future enjoyment. Hydrologic features make up a large portion of the park and attract visitor recreation. There are several known sources of pollution that enter these waterways, mainly from upstream sources of waste discharge. The national park and its surrounding areas hold great ecological significance, however, there are many threats to the surface water quality in this area. Water quality degradation can impact the ecosystem, wildlife, and visitor experience. This project specifically considers exposure to fecal contamination in surface waters from upstream …
The Unintended Benefits Of Dams Should Be Considered Prior To Removal, Jacob Lloyd Jozefowski
The Unintended Benefits Of Dams Should Be Considered Prior To Removal, Jacob Lloyd Jozefowski
Theses and Dissertations
Dams provide multiple benefits; however, they also degrade rivers. Many dams no longer serve their intended purpose and are nearing the end of their operational lives. The aging of dams coupled with the cost of restoration and maintenance, regulation, and the ecologic impacts of dams has resulted in removal becoming a viable management alternative. Despite increased utilization, limited research and a lack of quantitative predictive capacity results in large amounts of uncertainty associated with impacts of dam removal. Additionally, dams which no longer serve their intended purpose may still have unintended positive benefits such as the prevention of the spread …
A Comparison Of Imputation Algorithms For Modeling Water Quality, Carter Alexander Allen
A Comparison Of Imputation Algorithms For Modeling Water Quality, Carter Alexander Allen
Senior Theses
This project addresses the need for predictive modeling tools to forecast expected concentrations of fecal bacteria in recreational waters in the Charleston, SC area. Data was provided by Charleston Waterkeeper, a water quality monitoring organization that has been measuring Enterococcus faecalis concentrations at 15 recreational sites since 2013. The data contain a non-negligible number of censored and missing observations, so three distinct imputation methods were developed and compared in terms of their effect on final predictive model characteristics. The best performing method relied on drawing samples from a truncated normal distribution to replace censored values, and using a partial model …
Investigating The Sources And Dynamics Of Escherichia Coli In A Missouri Ozarks Watershed, Kaleb Bassett
Investigating The Sources And Dynamics Of Escherichia Coli In A Missouri Ozarks Watershed, Kaleb Bassett
Masters Theses
"Escherichia coli, an intestinal bacterium, can serve as an indication of the presence of pathogenic microorganisms in water systems used by humans for recreation, agriculture, or drinking water. Many aquatic systems in the United States exceed the E. coli standard, set by the Environmental Protection Agency, for safe drinking water and recreational use. During 2016, a water sampling program was established in the Mill Creek watershed, a rural watershed located near the city of Newburg in Phelps County, Missouri. Water samples were collected before, during, and after storms throughout the year to examine the relationship between E. coli …