Kevin D Kroeger, PhD (Former Employee)
Science and Products
Filter Total Items: 23
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Stratigraphic controls on fluid and solute fluxes across the sediment-water interface of an estuary Stratigraphic controls on fluid and solute fluxes across the sediment-water interface of an estuary
Shallow stratigraphic features, such as infilled paleovalleys, modify fresh groundwater discharge to coastal waters and fluxes of saltwater and nutrients across the sediment–water interface. We quantify the spatial distribution of shallow surface water–groundwater exchange and nitrogen fluxes near a paleovalley in Indian River Bay, Delaware, using a hand resistivity probe, conventional...
Authors
Audrey H. Sawyer, Olesya Lazareva, Kevin D. Kroeger, Kyle Crespo, Clara S. Chan, Thomas Stieglitz, Holly A. Michael
Molecular signature of organic nitrogen in septic-impacted groundwater Molecular signature of organic nitrogen in septic-impacted groundwater
Dissolved inorganic and organic nitrogen levels are elevated in aquatic systems due to anthropogenic activities. Dissolved organic nitrogen (DON) arises from various sources, and its impact could be more clearly constrained if specific sources were identified and if the molecular-level composition of DON were better understood. In this work, the pharmaceutical carbamazepine was used to...
Authors
William A. Arnold, Krista Longnecker, Kevin D. Kroeger, Elizabeth B. Kujawinski
Limited denitrification in glacial deposit aquifers having thick unsaturated zones (Long Island, USA) Limited denitrification in glacial deposit aquifers having thick unsaturated zones (Long Island, USA)
The goal of this study was to demonstrate how the extent of denitrification, which is indirectly related to dissolved organ carbon and directly related to oxygen concentrations, can also be linked to unsaturated-zone thickness, a mappable aquifer property. Groundwater from public supply and monitoring wells in Northport on Long Island, New York state (USA), were analyzed for...
Authors
Caitlin Young, Kevin D. Kroeger, Gilbert Hanson
Continuous resistivity profiling data from Great South Bay, Long Island, New York Continuous resistivity profiling data from Great South Bay, Long Island, New York
An investigation of submarine aquifers adjacent to the Fire Island National Seashore and Long Island, New York was conducted to assess the importance of submarine groundwater discharge as a potential nonpoint source of nitrogen delivery to Great South Bay. Over 200 kilometers of continuous resistivity profiling data were collected to image the fresh-saline groundwater interface in...
Authors
V.A. Cross, J.F. Bratton, K.D. Kroeger, John Crusius, C.R. Worley
Continuous resistivity profiling data from Northport Harbor and Manhasset Bay, Long Island, New York Continuous resistivity profiling data from Northport Harbor and Manhasset Bay, Long Island, New York
An investigation of coastal groundwater systems was performed along the North Shore of Long Island, New York, during May 2008 to constrain nutrient delivery to Northport Harbor and Manhasset Bay by delineating locations of likely groundwater discharge. The embayments are bounded by steep moraines and are underlain by thick, fine-grained sediments deposited in proglacial lakes during the...
Authors
V.A. Cross, J.F. Bratton, John Crusius, K.D. Kroeger, C.R. Worley
Continuous resistivity profiling data from the Corsica River Estuary, Maryland Continuous resistivity profiling data from the Corsica River Estuary, Maryland
Submarine groundwater discharge (SGD) into Maryland's Corsica River Estuary was investigated as part of a larger study to determine its importance in nutrient delivery to the Chesapeake Bay. The Corsica River Estuary represents a coastal lowland setting typical of much of the eastern bay. An interdisciplinary U.S. Geological Survey (USGS) science team conducted field operations in the...
Authors
V.A. Cross, J.F. Bratton, C.R. Worley, John Crusius, K.D. Kroeger
Science and Products
Filter Total Items: 23
No Result Found
Filter Total Items: 71
Stratigraphic controls on fluid and solute fluxes across the sediment-water interface of an estuary Stratigraphic controls on fluid and solute fluxes across the sediment-water interface of an estuary
Shallow stratigraphic features, such as infilled paleovalleys, modify fresh groundwater discharge to coastal waters and fluxes of saltwater and nutrients across the sediment–water interface. We quantify the spatial distribution of shallow surface water–groundwater exchange and nitrogen fluxes near a paleovalley in Indian River Bay, Delaware, using a hand resistivity probe, conventional...
Authors
Audrey H. Sawyer, Olesya Lazareva, Kevin D. Kroeger, Kyle Crespo, Clara S. Chan, Thomas Stieglitz, Holly A. Michael
Molecular signature of organic nitrogen in septic-impacted groundwater Molecular signature of organic nitrogen in septic-impacted groundwater
Dissolved inorganic and organic nitrogen levels are elevated in aquatic systems due to anthropogenic activities. Dissolved organic nitrogen (DON) arises from various sources, and its impact could be more clearly constrained if specific sources were identified and if the molecular-level composition of DON were better understood. In this work, the pharmaceutical carbamazepine was used to...
Authors
William A. Arnold, Krista Longnecker, Kevin D. Kroeger, Elizabeth B. Kujawinski
Limited denitrification in glacial deposit aquifers having thick unsaturated zones (Long Island, USA) Limited denitrification in glacial deposit aquifers having thick unsaturated zones (Long Island, USA)
The goal of this study was to demonstrate how the extent of denitrification, which is indirectly related to dissolved organ carbon and directly related to oxygen concentrations, can also be linked to unsaturated-zone thickness, a mappable aquifer property. Groundwater from public supply and monitoring wells in Northport on Long Island, New York state (USA), were analyzed for...
Authors
Caitlin Young, Kevin D. Kroeger, Gilbert Hanson
Continuous resistivity profiling data from Great South Bay, Long Island, New York Continuous resistivity profiling data from Great South Bay, Long Island, New York
An investigation of submarine aquifers adjacent to the Fire Island National Seashore and Long Island, New York was conducted to assess the importance of submarine groundwater discharge as a potential nonpoint source of nitrogen delivery to Great South Bay. Over 200 kilometers of continuous resistivity profiling data were collected to image the fresh-saline groundwater interface in...
Authors
V.A. Cross, J.F. Bratton, K.D. Kroeger, John Crusius, C.R. Worley
Continuous resistivity profiling data from Northport Harbor and Manhasset Bay, Long Island, New York Continuous resistivity profiling data from Northport Harbor and Manhasset Bay, Long Island, New York
An investigation of coastal groundwater systems was performed along the North Shore of Long Island, New York, during May 2008 to constrain nutrient delivery to Northport Harbor and Manhasset Bay by delineating locations of likely groundwater discharge. The embayments are bounded by steep moraines and are underlain by thick, fine-grained sediments deposited in proglacial lakes during the...
Authors
V.A. Cross, J.F. Bratton, John Crusius, K.D. Kroeger, C.R. Worley
Continuous resistivity profiling data from the Corsica River Estuary, Maryland Continuous resistivity profiling data from the Corsica River Estuary, Maryland
Submarine groundwater discharge (SGD) into Maryland's Corsica River Estuary was investigated as part of a larger study to determine its importance in nutrient delivery to the Chesapeake Bay. The Corsica River Estuary represents a coastal lowland setting typical of much of the eastern bay. An interdisciplinary U.S. Geological Survey (USGS) science team conducted field operations in the...
Authors
V.A. Cross, J.F. Bratton, C.R. Worley, John Crusius, K.D. Kroeger
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government