Peter B McMahon (Former Employee)
Science and Products
Filter Total Items: 14
No Result Found
Filter Total Items: 118
Water quality in the South Platte River basin, Colorado, Nebraska, and Wyoming, 1992-95 Water quality in the South Platte River basin, Colorado, Nebraska, and Wyoming, 1992-95
No abstract available.
Authors
Kevin Dennehy, David Litke, Cathy Tate, Sharon Qi, Peter McMahon, Breton Bruce, Robert Kimbrough, Janet Heiny
In-situ bioremediation of nitrate-contaminated ground water — A pilot test, Julesburg, Colorado, 1996–97 In-situ bioremediation of nitrate-contaminated ground water — A pilot test, Julesburg, Colorado, 1996–97
No abstract available.
Authors
P.B. McMahon, K.F. Dennehy, B. Bruce
Distribution of terminal electron-accepting processes in an aquifer having multiple contaminant sources Distribution of terminal electron-accepting processes in an aquifer having multiple contaminant sources
Concentrations of electron acceptors, electron donors, and H2 in groundwater were measured to determine the distribution of terminal electron-accepting processes (TEAPs) in an alluvial aquifer having multiple contaminant sources. Upgradient contaminant sources included two separate hydrocarbon point sources, one of which contained the fuel oxygenate methyl tertbutyl ether (MTBE)...
Authors
P.B. McMahon, B. Bruce
Effect of nitrate, organic carbon, and temperature on potential denitrification rates in nitrate-rich riverbed sediments Effect of nitrate, organic carbon, and temperature on potential denitrification rates in nitrate-rich riverbed sediments
A study conducted in 1994 as part of the US Geological Survey's National Water-Quality Assessment Program, South Platte River Basin investigation, examined the effect of certain environmental factors on potential denitrification rates in nitrate-rich riverbed sediments. The acetylene block technique was used to measure nitrous oxide (N2O) production rates in laboratory incubations of...
Authors
K.S. Pfenning, P.B. McMahon
Shallow ground-water quality beneath a major urban center: Denver, Colorado, USA Shallow ground-water quality beneath a major urban center: Denver, Colorado, USA
A survey of the chemical quality of ground water in the unconsolidated alluvial aquifer beneath a major urban center (Denver, Colorado, USA) was performed in 1993 with the objective of characterizing the quality of shallow ground-water in the urban area and relating water quality to land use. Thirty randomly selected alluvial wells were each sampled once for a broad range of dissolved...
Authors
B. Bruce, P.B. McMahon
Denitrification and mixing in a stream-aquifer system: Effects on nitrate loading to surface water Denitrification and mixing in a stream-aquifer system: Effects on nitrate loading to surface water
Ground water in terrace deposits of the South Platte River alluvial aquifer near Greeley, Colorado, USA, had a median nitrate concentration of 1857 μmol l−1. Median nitrate concentrations in ground water from adjacent floodplain deposits (468 μmol l−1) and riverbed sediments (461 μmol l−1), both of which are downgradient from the terrace deposits, were lower than the median concentration...
Authors
P.B. McMahon, J.K. Böhlke
Science and Products
Filter Total Items: 14
No Result Found
Filter Total Items: 118
Water quality in the South Platte River basin, Colorado, Nebraska, and Wyoming, 1992-95 Water quality in the South Platte River basin, Colorado, Nebraska, and Wyoming, 1992-95
No abstract available.
Authors
Kevin Dennehy, David Litke, Cathy Tate, Sharon Qi, Peter McMahon, Breton Bruce, Robert Kimbrough, Janet Heiny
In-situ bioremediation of nitrate-contaminated ground water — A pilot test, Julesburg, Colorado, 1996–97 In-situ bioremediation of nitrate-contaminated ground water — A pilot test, Julesburg, Colorado, 1996–97
No abstract available.
Authors
P.B. McMahon, K.F. Dennehy, B. Bruce
Distribution of terminal electron-accepting processes in an aquifer having multiple contaminant sources Distribution of terminal electron-accepting processes in an aquifer having multiple contaminant sources
Concentrations of electron acceptors, electron donors, and H2 in groundwater were measured to determine the distribution of terminal electron-accepting processes (TEAPs) in an alluvial aquifer having multiple contaminant sources. Upgradient contaminant sources included two separate hydrocarbon point sources, one of which contained the fuel oxygenate methyl tertbutyl ether (MTBE)...
Authors
P.B. McMahon, B. Bruce
Effect of nitrate, organic carbon, and temperature on potential denitrification rates in nitrate-rich riverbed sediments Effect of nitrate, organic carbon, and temperature on potential denitrification rates in nitrate-rich riverbed sediments
A study conducted in 1994 as part of the US Geological Survey's National Water-Quality Assessment Program, South Platte River Basin investigation, examined the effect of certain environmental factors on potential denitrification rates in nitrate-rich riverbed sediments. The acetylene block technique was used to measure nitrous oxide (N2O) production rates in laboratory incubations of...
Authors
K.S. Pfenning, P.B. McMahon
Shallow ground-water quality beneath a major urban center: Denver, Colorado, USA Shallow ground-water quality beneath a major urban center: Denver, Colorado, USA
A survey of the chemical quality of ground water in the unconsolidated alluvial aquifer beneath a major urban center (Denver, Colorado, USA) was performed in 1993 with the objective of characterizing the quality of shallow ground-water in the urban area and relating water quality to land use. Thirty randomly selected alluvial wells were each sampled once for a broad range of dissolved...
Authors
B. Bruce, P.B. McMahon
Denitrification and mixing in a stream-aquifer system: Effects on nitrate loading to surface water Denitrification and mixing in a stream-aquifer system: Effects on nitrate loading to surface water
Ground water in terrace deposits of the South Platte River alluvial aquifer near Greeley, Colorado, USA, had a median nitrate concentration of 1857 μmol l−1. Median nitrate concentrations in ground water from adjacent floodplain deposits (468 μmol l−1) and riverbed sediments (461 μmol l−1), both of which are downgradient from the terrace deposits, were lower than the median concentration...
Authors
P.B. McMahon, J.K. Böhlke