Jimmy M Clark
Jimmy Clark is Assistant Director - Studies at the South Atlantic Water Science Center.
Science and Products
Filter Total Items: 22
Effect of wastewater treatment facility closure on endocrine disrupting chemicals in a Coastal Plain stream
Wastewater treatment facility (WWTF) closures are rare environmental remediation events; offering unique insight into contaminant persistence, long-term wastewater impacts, and ecosystem recovery processes. The U.S. Geological Survey assessed the fate of select endocrine disrupting chemicals (EDC) in surface water and streambed sediment one year before and one year after closure of a long-term WWT
Authors
Paul M. Bradley, Celeste A. Journey, Jimmy M. Clark
Aerobic biodegradation potential of endocrine disrupting chemicals in surface-water sediment at Rocky Mountains National Park, USA
Endocrine disrupting chemicals (EDC) in surface water and bed sediment threaten the structure and function of aquatic ecosystems. In natural, remote, and protected surface-water environments where contaminant releases are sporadic, contaminant biodegradation is a fundamental driver of exposure concentration, timing, duration, and, thus, EDC ecological risk. Anthropogenic contaminants, including kn
Authors
Paul M. Bradley, William A. Battaglin, Luke R. Iwanowicz, Jimmy M. Clark, Celeste A. Journey
Spatial and temporal variation in microcystins occurrence in wadeable streams in the southeastern USA
Despite historical observations of potential microcystin-producing cyanobacteria (including Leptolyngbya,Phormidium, Pseudoanabaena, and Anabaena species) in 74% of headwater streams in Alabama, Georgia, South Carolina, and North Carolina (USA) from 1993 to 2011, fluvial cyanotoxin occurrence has not been systematically assessed in the southeastern United States. To begin to address this data gap,
Authors
Keith A. Loftin, Jimmy M. Clark, Celeste A. Journey, Dana W. Kolpin, Peter C. Van Metre, Paul M. Bradley
Scaling up watershed model parameters--Flow and load simulations of the Edisto River Basin
The Edisto River is the longest and largest river system completely contained in South Carolina and is one of the longest free flowing blackwater rivers in the United States. The Edisto River basin also has fish-tissue mercury concentrations that are some of the highest recorded in the United States. As part of an effort by the U.S. Geological Survey to expand the understanding of relations among
Authors
Toby D. Feaster, Stephen T. Benedict, Jimmy M. Clark, Paul M. Bradley, Paul Conrads
Scaling up watershed model parameters: flow and load simulations of the Edisto River Basin, South Carolina, 2007-09
As part of an ongoing effort by the U.S. Geological Survey to expand the understanding of relations among hydrologic, geochemical, and ecological processes that affect fish-tissue mercury concentrations within the Edisto River Basin, analyses and simulations of the hydrology of the Edisto River Basin were made using the topography-based hydrological model (TOPMODEL). A primary focus of the investi
Authors
Toby D. Feaster, Stephen T. Benedict, Jimmy M. Clark, Paul M. Bradley, Paul Conrads
Digital surfaces and thicknesses of selected hydrogeologic units within the Ozark Plateaus aquifer system, northwestern Arkansas
Digital surfaces and thicknesses of nine hydrogeologic units of the Ozark Plateaus aquifer system from land surface to the top of the Gunter Sandstone in northwestern Arkansas were created using geophysical logs, drillers’ logs, geologist-interpreted formation tops, and previously published maps. The 6,040 square mile study area in the Ozark Plateaus Province includes Benton, Washington, Carroll,
Authors
John B. Czarnecki, Susan E. Bolyard, Rheannon M. Hart, Jimmy M. Clark
Tidal flow dynamics and background fluorescence of the Atlantic Intracoastal Waterway in the vicinity of Sullivan’s Island and the Isle of Palms, South Carolina, 2011-12
To effectively plan site-specific studies to understand the connection between wastewater effluent and shellfish beds, data are needed concerning flow dynamics and background fluorescence in the Atlantic Intracoastal Waterway near the effluent outfalls on Sullivan’s Island and the Isle of Palms. Tidal flows were computed by the U.S. Geological Survey for three stations and longitudinal water-quali
Authors
Paul Conrads, Celeste A. Journey, Jimmy M. Clark, Victor A. Levesque
Trace element, semivolatile organic, and chlorinated organic compound concentrations in bed sediments of selected streams at Fort Gordon, Georgia, February-April 2010
A spatial survey of streams was conducted from February to April 2010 to assess the concentrations of major ions, selected trace elements, semivolatile organic compounds, organochlorine pesticides, and polychlorinated biphenyls associated with the bed sediments of surface waters at Fort Gordon military installation near Augusta, Georgia. This investigation expanded a previous study conducted in Ma
Authors
Lashun K. Thomas, Celeste A. Journey, Whitney J. Stringfield, Jimmy M. Clark, Paul M. Bradley, John B. Wellborn, Hagan Ratliff, Thomas A. Abrahamsen
Environmental settings of streams sampled for mercury in New York and South Carolina, 2005-09
This report summarizes the environmental settings of streams in New York and South Carolina, where the U.S. Geological Survey completed detailed investigations during 2005-09 into factors contributing to mercury bioaccumulation in top-predator fish and other stream organisms. Descriptions of location, land use/land cover, climate, precipitation, atmospheric deposition, hydrology, water temperature
Authors
Barbara C. Scudder Eikenberry, Karen Riva-Murray, Martyn J. Smith, Paul M. Bradley, Daniel T. Button, Jimmy M. Clark, Douglas A. Burns, Celeste A. Journey
Riparian Land Use/Land Cover Data for Three Study Units in Group II of the Nutrient Enrichment Effects Topical Study of the National Water-Quality Assessment Program
This data set was developed as part of the National Water-Quality Assessment (NAWQA) Program, Nutrient Enrichment Effects Topical (NEET) study. This report is concerned with three of the eight NEET study units distributed across the United States: Ozark Plateaus, Upper Mississippi River Basin, and Upper Snake River Basin, collectively known as Group II of the NEET study. Ninety stream reaches were
Authors
Michaela R. Johnson, Jimmy M. Clark, Ross G. Dickinson, Christopher A. Sanocki, Andrew W. Tranmer
Science and Products
- Publications
Filter Total Items: 22
Effect of wastewater treatment facility closure on endocrine disrupting chemicals in a Coastal Plain stream
Wastewater treatment facility (WWTF) closures are rare environmental remediation events; offering unique insight into contaminant persistence, long-term wastewater impacts, and ecosystem recovery processes. The U.S. Geological Survey assessed the fate of select endocrine disrupting chemicals (EDC) in surface water and streambed sediment one year before and one year after closure of a long-term WWTAuthorsPaul M. Bradley, Celeste A. Journey, Jimmy M. ClarkAerobic biodegradation potential of endocrine disrupting chemicals in surface-water sediment at Rocky Mountains National Park, USA
Endocrine disrupting chemicals (EDC) in surface water and bed sediment threaten the structure and function of aquatic ecosystems. In natural, remote, and protected surface-water environments where contaminant releases are sporadic, contaminant biodegradation is a fundamental driver of exposure concentration, timing, duration, and, thus, EDC ecological risk. Anthropogenic contaminants, including knAuthorsPaul M. Bradley, William A. Battaglin, Luke R. Iwanowicz, Jimmy M. Clark, Celeste A. JourneySpatial and temporal variation in microcystins occurrence in wadeable streams in the southeastern USA
Despite historical observations of potential microcystin-producing cyanobacteria (including Leptolyngbya,Phormidium, Pseudoanabaena, and Anabaena species) in 74% of headwater streams in Alabama, Georgia, South Carolina, and North Carolina (USA) from 1993 to 2011, fluvial cyanotoxin occurrence has not been systematically assessed in the southeastern United States. To begin to address this data gap,AuthorsKeith A. Loftin, Jimmy M. Clark, Celeste A. Journey, Dana W. Kolpin, Peter C. Van Metre, Paul M. BradleyScaling up watershed model parameters--Flow and load simulations of the Edisto River Basin
The Edisto River is the longest and largest river system completely contained in South Carolina and is one of the longest free flowing blackwater rivers in the United States. The Edisto River basin also has fish-tissue mercury concentrations that are some of the highest recorded in the United States. As part of an effort by the U.S. Geological Survey to expand the understanding of relations amongAuthorsToby D. Feaster, Stephen T. Benedict, Jimmy M. Clark, Paul M. Bradley, Paul ConradsScaling up watershed model parameters: flow and load simulations of the Edisto River Basin, South Carolina, 2007-09
As part of an ongoing effort by the U.S. Geological Survey to expand the understanding of relations among hydrologic, geochemical, and ecological processes that affect fish-tissue mercury concentrations within the Edisto River Basin, analyses and simulations of the hydrology of the Edisto River Basin were made using the topography-based hydrological model (TOPMODEL). A primary focus of the investiAuthorsToby D. Feaster, Stephen T. Benedict, Jimmy M. Clark, Paul M. Bradley, Paul ConradsDigital surfaces and thicknesses of selected hydrogeologic units within the Ozark Plateaus aquifer system, northwestern Arkansas
Digital surfaces and thicknesses of nine hydrogeologic units of the Ozark Plateaus aquifer system from land surface to the top of the Gunter Sandstone in northwestern Arkansas were created using geophysical logs, drillers’ logs, geologist-interpreted formation tops, and previously published maps. The 6,040 square mile study area in the Ozark Plateaus Province includes Benton, Washington, Carroll,AuthorsJohn B. Czarnecki, Susan E. Bolyard, Rheannon M. Hart, Jimmy M. ClarkTidal flow dynamics and background fluorescence of the Atlantic Intracoastal Waterway in the vicinity of Sullivan’s Island and the Isle of Palms, South Carolina, 2011-12
To effectively plan site-specific studies to understand the connection between wastewater effluent and shellfish beds, data are needed concerning flow dynamics and background fluorescence in the Atlantic Intracoastal Waterway near the effluent outfalls on Sullivan’s Island and the Isle of Palms. Tidal flows were computed by the U.S. Geological Survey for three stations and longitudinal water-qualiAuthorsPaul Conrads, Celeste A. Journey, Jimmy M. Clark, Victor A. LevesqueTrace element, semivolatile organic, and chlorinated organic compound concentrations in bed sediments of selected streams at Fort Gordon, Georgia, February-April 2010
A spatial survey of streams was conducted from February to April 2010 to assess the concentrations of major ions, selected trace elements, semivolatile organic compounds, organochlorine pesticides, and polychlorinated biphenyls associated with the bed sediments of surface waters at Fort Gordon military installation near Augusta, Georgia. This investigation expanded a previous study conducted in MaAuthorsLashun K. Thomas, Celeste A. Journey, Whitney J. Stringfield, Jimmy M. Clark, Paul M. Bradley, John B. Wellborn, Hagan Ratliff, Thomas A. AbrahamsenEnvironmental settings of streams sampled for mercury in New York and South Carolina, 2005-09
This report summarizes the environmental settings of streams in New York and South Carolina, where the U.S. Geological Survey completed detailed investigations during 2005-09 into factors contributing to mercury bioaccumulation in top-predator fish and other stream organisms. Descriptions of location, land use/land cover, climate, precipitation, atmospheric deposition, hydrology, water temperatureAuthorsBarbara C. Scudder Eikenberry, Karen Riva-Murray, Martyn J. Smith, Paul M. Bradley, Daniel T. Button, Jimmy M. Clark, Douglas A. Burns, Celeste A. JourneyRiparian Land Use/Land Cover Data for Three Study Units in Group II of the Nutrient Enrichment Effects Topical Study of the National Water-Quality Assessment Program
This data set was developed as part of the National Water-Quality Assessment (NAWQA) Program, Nutrient Enrichment Effects Topical (NEET) study. This report is concerned with three of the eight NEET study units distributed across the United States: Ozark Plateaus, Upper Mississippi River Basin, and Upper Snake River Basin, collectively known as Group II of the NEET study. Ninety stream reaches wereAuthorsMichaela R. Johnson, Jimmy M. Clark, Ross G. Dickinson, Christopher A. Sanocki, Andrew W. Tranmer - Science
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