Ronald W Harvey (Former Employee)
Science and Products
Filter Total Items: 80
Response to comment on "Use of colloid filtration theory in modeling movement of bacteria through a contaminated sandy aquifer" Response to comment on "Use of colloid filtration theory in modeling movement of bacteria through a contaminated sandy aquifer"
No abstract available.
Authors
Ronald W. Harvey, Stephen P. Garabedian
Microbial distributions, activities, and movement in the terrestial subsurface: Experimental and theoretical studies Microbial distributions, activities, and movement in the terrestial subsurface: Experimental and theoretical studies
No abstract available.
Authors
Ronald W. Harvey, M.A. Widdowson
Transport of pathogens through soils and aquifers Transport of pathogens through soils and aquifers
No abstract available.
Authors
G. Bitton, R.W. Harvey
Associations of free-living bacteria and dissolved organic compounds in a plume of contaminated groundwater Associations of free-living bacteria and dissolved organic compounds in a plume of contaminated groundwater
Associations of free-living bacteria (FLB) and dissolved organic contaminants in a 4-km-long plume of sewage-contaminated groundwater were investigated. Abundance of FLB in the core of the plume (as delineated by maximum specific conductance) steadily decreased in the direction of flow from a point 0.25 km downgradient from the source to the toe of the plume. At 0.25 km downgradient, FLB...
Authors
Ronald W. Harvey, Larry B. Barber
Laboratory investigations on the role of sediment surface and ground water chemistry in transport of bacteria through a contaminated Sandy Aquifer Laboratory investigations on the role of sediment surface and ground water chemistry in transport of bacteria through a contaminated Sandy Aquifer
No abstract available.
Authors
M. A. Scholl, R.W. Harvey
Associations of free-living bacteria and dissolved organic compounds in a plume of contaminated groundwater Associations of free-living bacteria and dissolved organic compounds in a plume of contaminated groundwater
Associations of free-living bacteria (FLB) and dissolved organic contaminants in a 4-km-long plume of sewage-contaminated groundwater were investigated. Abundance of FLB in the core of the plume (as delineated by maximum specific conductance) steadily decreased in the direction of flow from a point 0.25 km downgradient from the source to the toe of the plume. At 0.25 km downgradient, FLB...
Authors
R.W. Harvey, L.B. Barber
Parameters involved in modeling movement of bacteria in groundwater Parameters involved in modeling movement of bacteria in groundwater
No abstract available.
Authors
Ronald W. Harvey
Importance of closely spaced vertical sampling in delineating chemical and microbiological gradients in groundwater studies Importance of closely spaced vertical sampling in delineating chemical and microbiological gradients in groundwater studies
Vertical gradients of selected chemical constituents, bacterial populations, bacterial activity and electron acceptors were investigated for an unconfined aquifer contaminated with nitrate and organic compounds on Cape Cod, Massachusetts, U.S.A. Fifteen-port multilevel sampling devices (MLS's) were installed within the contaminant plume at the source of the contamination, and at 250 and...
Authors
R. L. Smith, R.W. Harvey, D.R. LeBlanc
Use of colloid filtration theory in modeling movement of bacteria through a contaminated sandy aquifer Use of colloid filtration theory in modeling movement of bacteria through a contaminated sandy aquifer
\A filtration model commonly used to describe removal of colloids during packed-bed filtration in water treatment applications was modified for describing downgradient transport of bacteria in sandy, aquifer sediments. The modified model was applied to the results of a small-scale (7 m), natural-gradient tracer test and to observations of an indigenous bacterial population moving...
Authors
R.W. Harvey, S. P. Garabedian
Application of a hollow-fiber, tangential-flow device for sampling suspended bacteria and particles from natural waters Application of a hollow-fiber, tangential-flow device for sampling suspended bacteria and particles from natural waters
The design and application of a hollow-fiber tangential-flow filtration device has been used to concentrate bacteria and suspended particles from large volume surface water and groundwater samples (i.e., hundreds of liters). Filtrate tlux rates (4–8 L min−1) are equal to or faster than those of other devices that are based on continuous flow centrifugation and plate and frame filtration...
Authors
J.S. Kuwabara, R.W. Harvey
Transport of microspheres and indigenous bacteria through a sandy aquifer: Results of natural- and forced-gradient tracer experiments Transport of microspheres and indigenous bacteria through a sandy aquifer: Results of natural- and forced-gradient tracer experiments
Transport of indigenous bacteria through sandy aquifer sediments was investigated in forced- and natural-gradient tracer teste. A diverse population of bacteria was collected and concentrated from groundwater at the site, stained with a DNA-specific fluorochrome, and injected back into the aquifer. Included with the injectate were a conservative tracer (Br- or Cl-) and bacteria-sized (0...
Authors
R.W. Harvey, L.H. George, R. L. Smith, D.R. LeBlanc
Big Soda Lake (Nevada). 1. Pelagic bacterial heterotrophy and biomass Big Soda Lake (Nevada). 1. Pelagic bacterial heterotrophy and biomass
Bacterial activities and abundance were measured seasonally in the water column of meromictic Big Soda Lake which is divided into three chemically distinct zones: aerobic mixolimnion, anaerobic mixolimnion, and anaerobic monimolimnion. Bacterial abundance ranged between 5 and 52 x 106 cells ml−1, with highest biomass at the interfaces between these zones: 2–4 mg C liter−1 in the...
Authors
Jon P. Zehr, Ronald W. Harvey, Ronald S. Oremland, James E. Cloern, Leah H. George, Judith L. Lane
Science and Products
Filter Total Items: 80
Response to comment on "Use of colloid filtration theory in modeling movement of bacteria through a contaminated sandy aquifer" Response to comment on "Use of colloid filtration theory in modeling movement of bacteria through a contaminated sandy aquifer"
No abstract available.
Authors
Ronald W. Harvey, Stephen P. Garabedian
Microbial distributions, activities, and movement in the terrestial subsurface: Experimental and theoretical studies Microbial distributions, activities, and movement in the terrestial subsurface: Experimental and theoretical studies
No abstract available.
Authors
Ronald W. Harvey, M.A. Widdowson
Transport of pathogens through soils and aquifers Transport of pathogens through soils and aquifers
No abstract available.
Authors
G. Bitton, R.W. Harvey
Associations of free-living bacteria and dissolved organic compounds in a plume of contaminated groundwater Associations of free-living bacteria and dissolved organic compounds in a plume of contaminated groundwater
Associations of free-living bacteria (FLB) and dissolved organic contaminants in a 4-km-long plume of sewage-contaminated groundwater were investigated. Abundance of FLB in the core of the plume (as delineated by maximum specific conductance) steadily decreased in the direction of flow from a point 0.25 km downgradient from the source to the toe of the plume. At 0.25 km downgradient, FLB...
Authors
Ronald W. Harvey, Larry B. Barber
Laboratory investigations on the role of sediment surface and ground water chemistry in transport of bacteria through a contaminated Sandy Aquifer Laboratory investigations on the role of sediment surface and ground water chemistry in transport of bacteria through a contaminated Sandy Aquifer
No abstract available.
Authors
M. A. Scholl, R.W. Harvey
Associations of free-living bacteria and dissolved organic compounds in a plume of contaminated groundwater Associations of free-living bacteria and dissolved organic compounds in a plume of contaminated groundwater
Associations of free-living bacteria (FLB) and dissolved organic contaminants in a 4-km-long plume of sewage-contaminated groundwater were investigated. Abundance of FLB in the core of the plume (as delineated by maximum specific conductance) steadily decreased in the direction of flow from a point 0.25 km downgradient from the source to the toe of the plume. At 0.25 km downgradient, FLB...
Authors
R.W. Harvey, L.B. Barber
Parameters involved in modeling movement of bacteria in groundwater Parameters involved in modeling movement of bacteria in groundwater
No abstract available.
Authors
Ronald W. Harvey
Importance of closely spaced vertical sampling in delineating chemical and microbiological gradients in groundwater studies Importance of closely spaced vertical sampling in delineating chemical and microbiological gradients in groundwater studies
Vertical gradients of selected chemical constituents, bacterial populations, bacterial activity and electron acceptors were investigated for an unconfined aquifer contaminated with nitrate and organic compounds on Cape Cod, Massachusetts, U.S.A. Fifteen-port multilevel sampling devices (MLS's) were installed within the contaminant plume at the source of the contamination, and at 250 and...
Authors
R. L. Smith, R.W. Harvey, D.R. LeBlanc
Use of colloid filtration theory in modeling movement of bacteria through a contaminated sandy aquifer Use of colloid filtration theory in modeling movement of bacteria through a contaminated sandy aquifer
\A filtration model commonly used to describe removal of colloids during packed-bed filtration in water treatment applications was modified for describing downgradient transport of bacteria in sandy, aquifer sediments. The modified model was applied to the results of a small-scale (7 m), natural-gradient tracer test and to observations of an indigenous bacterial population moving...
Authors
R.W. Harvey, S. P. Garabedian
Application of a hollow-fiber, tangential-flow device for sampling suspended bacteria and particles from natural waters Application of a hollow-fiber, tangential-flow device for sampling suspended bacteria and particles from natural waters
The design and application of a hollow-fiber tangential-flow filtration device has been used to concentrate bacteria and suspended particles from large volume surface water and groundwater samples (i.e., hundreds of liters). Filtrate tlux rates (4–8 L min−1) are equal to or faster than those of other devices that are based on continuous flow centrifugation and plate and frame filtration...
Authors
J.S. Kuwabara, R.W. Harvey
Transport of microspheres and indigenous bacteria through a sandy aquifer: Results of natural- and forced-gradient tracer experiments Transport of microspheres and indigenous bacteria through a sandy aquifer: Results of natural- and forced-gradient tracer experiments
Transport of indigenous bacteria through sandy aquifer sediments was investigated in forced- and natural-gradient tracer teste. A diverse population of bacteria was collected and concentrated from groundwater at the site, stained with a DNA-specific fluorochrome, and injected back into the aquifer. Included with the injectate were a conservative tracer (Br- or Cl-) and bacteria-sized (0...
Authors
R.W. Harvey, L.H. George, R. L. Smith, D.R. LeBlanc
Big Soda Lake (Nevada). 1. Pelagic bacterial heterotrophy and biomass Big Soda Lake (Nevada). 1. Pelagic bacterial heterotrophy and biomass
Bacterial activities and abundance were measured seasonally in the water column of meromictic Big Soda Lake which is divided into three chemically distinct zones: aerobic mixolimnion, anaerobic mixolimnion, and anaerobic monimolimnion. Bacterial abundance ranged between 5 and 52 x 106 cells ml−1, with highest biomass at the interfaces between these zones: 2–4 mg C liter−1 in the...
Authors
Jon P. Zehr, Ronald W. Harvey, Ronald S. Oremland, James E. Cloern, Leah H. George, Judith L. Lane