Persistence and Microbial Source Tracking of <i>Escherichia coli</i> at a Swimming Beach at Lake of the Ozarks State Park, Missouri

Wilson, J. L.; Schumacher, John G.; Burken, Joel G.

doi:10.1111/1752-1688.12404

Cited by 3 publications

(4 citation statements)

References 32 publications

(38 reference statements)

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“…Water flow paths or origin may be determined using dye tracing, which has been used in several groundwater dye tracing studies in northeast Tennessee (Doyka, 2017;Wilson et al, 2016). Combined with geologic mapping and geospatial analysis similar to the methods of Burnham et al (2015), dye tracing may be a suitable method to identify the water source for the spring at Sinking Creek.…”

Section: Comparison Of Sampling Sitesmentioning

confidence: 99%

Storm sampling to assess inclement weather impacts on water quality in a karst watershed: Sinking Creek, Watauga watershed, East Tennessee

et al. 2021

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Sinking Creek (HUC 06010103046), in the Watauga watershed of northeast Tennessee, is impaired due to Escherichia coli. To assess how E. coli and other water quality parameters fluctuated during storm events, water samples were collected with automated samplers during eight storms at two locations: Sinking Creek and a feeder spring. Turbidity and electrical conductivity data loggers were deployed in the creek, and dissolved oxygen (DO) was measured in situ. The presence of optical brighteners, used in detergents and an indicator of residential wastewater, was assessed using cotton fabric deployed at both sites and analyzed by an external laboratory. The Colilert Quanti-Tray method was used to process water samples for E. coli. Relationships between water quality parameters and lagged precipitation were assessed using crosscorrelation. At the creek, E. coli and turbidity increased within 2 h of precipitation, exceeding the single sample water quality standard of 941 cfu 100 ml −1 during the storm. At the spring, E. coli became elevated more quickly than at the stream, within 30 min of precipitation, and decreased below the standard during the event. Electrical conductivity decreased within 1.5 h of the storm at the creek, and DO levels were higher at the creek than at the spring. Optical brightener analysis indicated possible presence of residential wastewater during one of two sampled storms. Targeted sampling and dye tracing are recommended to validate this hypothesis. These results may be used to inform field methods in similar storm sampling studies and will be useful in watershed restoration efforts in Sinking Creek. 1 INTRODUCTION Water quality in rivers and streams in the United States has been affected by channelization, oxygen depletion, and agricultural runoff, resulting in impairment of 187,872 stream and river miles and causing loss of habitat for aquatic life (USEPA, 2016). The two most common impairments in Ten

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Section: Comparison Of Sampling Sitesmentioning

confidence: 99%

Storm sampling to assess inclement weather impacts on water quality in a karst watershed: Sinking Creek, Watauga watershed, East Tennessee

et al. 2021

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“…E. coli concentrations ranged between 0 and 630,000 cfu/100 ml for creek samples ( Figure 5) and 0 and 4,600,000 cfu/100 ml for outfall samples ( Figure 6). Although only single samples were taken at each sample This finding is consistent with previous research regarding significant positive correlations between E. coli and turbidity in surface water (Chase et al, 2012;Wilson et al, 2016). No other water quality parameters were found to have significant correlations with E. coli concentrations in this study.…”

Section: E Coli Concentrations Of Samples Collected From Coyotesupporting

confidence: 92%

“…Historical beach grooming was also a possible factor that explained the high amount of avian results as the grooming buried the fecal material and provided protection from sunlight, high temperatures, and drying. Wilson et al (2016)…”

Section: Sedimentmentioning

confidence: 99%

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Nonpoint Source Bacterial Pollution in the Coyote Creek Watershed

Wilkinson

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NONPOINT SOURCE BACTERIAL POLLUTION IN THE COYOTE CREEK WATERSHED by Elisabeth Wilkinson Nonpoint source pollution is a global challenge affecting streams and rivers. Due to the highly dispersed nature of nonpoint sources, they are difficult to track and manage. The goal of this study was to assess the extent of bacterial pollution along Coyote Creek in Northern California and to provide insight on microwatershed characteristics and their potential correlation to bacteria loads. Samples were collected and analyzed for fecal indicator bacteria concentrations at 21 geographic locations from within the creek and its stormwater outfalls. E. coli levels within Coyote Creek and stormwater entering the creek exceeded recreational water quality standards. Stormwater outfall samples tended to have higher bacteria concentrations than creek samples. The average concentration for stormwater outfall samples was 439% higher than the average for creek samples. Increased bacterial concentrations were found in creek samples draining adjacent to industrial microwatersheds when compared to samples draining residential microwatersheds. Bacteria levels from creek samples showed weak positive correlations with the number of historical encampments upstream of each sample site. This study concludes that bacterial load mitigation efforts should focus on industrial land uses and prioritize stormwater retention and treatment. The effects of homeless encampments on bacterial load may be less of a concern than other sources. Recommendations include further investigation of sources contributing to elevated bacteria levels exiting stormwater outfalls using DNA tracking methods. v ACKNOWLEDGMENTS I could not have completed my thesis without the support received from family, friends, mentors, and San José State faculty and students. Thank you to my fellow San José State Students who volunteered their time to help with data collection in the field. Thank you to my committee members Rachel, Sabine, and Pat for your guidance, knowledge, and encouragement throughout the thesis process. Thank you to my mentors at the Santa Clara Valley Water District for technical expertise, equipment assistance, and for a rewarding internship experience that expanded my interest in stormwater management. Thank you to Bill, who not only offered countless hours of field assistance but also provided the upmost support, understanding, and patience. Lastly, thank you to my parents for your support throughout my entire education and for serving as a continuous example of dedication and hard work. vi TABLE OF CONTENTS List of Tables .

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Variability of E. coli in streambed sediment and its implication for sediment sampling

Salam

McDaniel

Bleakley

et al. 2021

Journal of Contaminant Hydrology

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Persistence and Microbial Source Tracking of Escherichia coli at a Swimming Beach at Lake of the Ozarks State Park, Missouri

Cited by 3 publications

References 32 publications

Storm sampling to assess inclement weather impacts on water quality in a karst watershed: Sinking Creek, Watauga watershed, East Tennessee

Storm sampling to assess inclement weather impacts on water quality in a karst watershed: Sinking Creek, Watauga watershed, East Tennessee

Nonpoint Source Bacterial Pollution in the Coyote Creek Watershed

Variability of E. coli in streambed sediment and its implication for sediment sampling

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