Denis R LeBlanc (Former Employee)
Science and Products
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A statistical evaluation of formation disturbance produced by well- casing installation methods
Water-resources investigations concerned with contaminant transport through aquifers comprised of very loose, unconsolidated sediments have shown that small-scale variations in aquifer characteristics can significantly affect solute transport and dispersion. Commonly, measurement accuracy and resolution have been limited by a borehole environment consisting of an annulus of disturbed sediments pro
Authors
R. H. Morin, Denis R. LeBlanc, W.E. Teasdale
Long-term fate of organic micropollutants in sewage-contaminated groundwater
No abstract available.
Authors
Larry B. Barber, M.P. Schroeder, E. Michael Thurman, Denis R. LeBlanc
Ground-water resources of Cape Cod, Massachusetts
No abstract available.
Authors
Denis R. LeBlanc, J.H. Guswa, M. H. Frimpter, C. J. Londquist
Digital models of ground-water flow in the Cape Cod aquifer system, Massachusetts
The Cape Cod aquifer system was simulated with three-dimensional finite-difference ground-water-flow models. Five areas were modeled to provide tools that can be used to evaluate the hydrologic impacts of regional water development and waste disposal.
The model boundaries were selected to represent the natural hydrologic boundaries of the aquifer. The boundary between fresh and saline ground w
Authors
John H. Guswa, Denis R. LeBlanc
Movement and fate of solutes in a plume of sewage-contaminated ground water, Cape Cod, Massachusetts: U.S. Geological Survey toxic waste ground-water contamination program
The U.S. Geological Survey (USGS) has begun a nationwide program to study the fate of toxic wastes in groundwater. Several sites where groundwater is known to be contaminated are being studied by interdisciplinary teams of geohydrologists, chemists, and microbiologists. The objective of these studies is to obtain a thorough quantitative understanding of the physical, chemical, and biological proce
Sewage plume in a sand and gravel aquifer, Cape Cod, Massachusetts
Secondarily treated domestic sewage has been disposed of on surface sand beds at the sewage treatment facility at Otis Air Force Base, Massachusetts, since 1936. Infiltration of the sewage through the sand beds into the underlying unconfined sand and gravel aquifer has resulted in a plume of sewage-contaminated ground water that is 2,500 to 3,500 feet wide, 75 feet thick, and more than 11,000 feet
Authors
Denis R. LeBlanc
Potential hydrologic impacts of ground-water withdrawal from the Cape Cod National Seashore, Truro, Massachusetts
The hydrologic impacts of continuous ground-water withdrawals at 0.75, 1.0, and 1.24 Mgal/d (million gallons per day) from a test-well site in the Cape Cod National Seashore, Truro, Massachusetts, were evaluated with a three-dimensional finite-difference steady-state-flow digital model. The digital model was prepared during an earlier study and is only briefly described. Continuous withdrawal of m
Authors
Denis R. LeBlanc
Digital models of ground-water flow in the Cape Cod aquifer system, Massachusetts
The Cape Cod aquifer system was simulated with three-dimensional finite-difference ground-water-flow models. Five areas were modeled to provide tools that can be used to evaluate the hydrologic impacts of regional water development and waste disposal.The model boundaries were selected to represent the natural hydrologic boundaries of the aquifer. The boundary between fresh and saline ground water
Authors
John H. Guswa, Denis R. LeBlanc
Progress report on hydrologic investigations of small drainage areas in New Hampshire: preliminary relations for estimating peak discharges on rural, unregulated streams
The magnitude and frequency of floods on rural, unregulated streams in New Hampshire with drainage areas between 0.27 and 622 square miles may be estimated from drainage area, main-channel slope, and a precipitation intensity index. Based on multiple-regression analyses of data from 59 gaged sites in New Hampshire and adjacent areas of bordering states, peak discharges for recurrence intervals of
Authors
Denis R. LeBlanc
Water-table map of Cape Cod, Massachusetts, May 23-27, 1976
No abstract available.
Authors
Denis R. LeBlanc, John H. Guswa
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Filter Total Items: 58
A statistical evaluation of formation disturbance produced by well- casing installation methods
Water-resources investigations concerned with contaminant transport through aquifers comprised of very loose, unconsolidated sediments have shown that small-scale variations in aquifer characteristics can significantly affect solute transport and dispersion. Commonly, measurement accuracy and resolution have been limited by a borehole environment consisting of an annulus of disturbed sediments proAuthorsR. H. Morin, Denis R. LeBlanc, W.E. TeasdaleLong-term fate of organic micropollutants in sewage-contaminated groundwater
No abstract available.AuthorsLarry B. Barber, M.P. Schroeder, E. Michael Thurman, Denis R. LeBlancGround-water resources of Cape Cod, Massachusetts
No abstract available.AuthorsDenis R. LeBlanc, J.H. Guswa, M. H. Frimpter, C. J. LondquistDigital models of ground-water flow in the Cape Cod aquifer system, Massachusetts
The Cape Cod aquifer system was simulated with three-dimensional finite-difference ground-water-flow models. Five areas were modeled to provide tools that can be used to evaluate the hydrologic impacts of regional water development and waste disposal. The model boundaries were selected to represent the natural hydrologic boundaries of the aquifer. The boundary between fresh and saline ground wAuthorsJohn H. Guswa, Denis R. LeBlancMovement and fate of solutes in a plume of sewage-contaminated ground water, Cape Cod, Massachusetts: U.S. Geological Survey toxic waste ground-water contamination program
The U.S. Geological Survey (USGS) has begun a nationwide program to study the fate of toxic wastes in groundwater. Several sites where groundwater is known to be contaminated are being studied by interdisciplinary teams of geohydrologists, chemists, and microbiologists. The objective of these studies is to obtain a thorough quantitative understanding of the physical, chemical, and biological proceSewage plume in a sand and gravel aquifer, Cape Cod, Massachusetts
Secondarily treated domestic sewage has been disposed of on surface sand beds at the sewage treatment facility at Otis Air Force Base, Massachusetts, since 1936. Infiltration of the sewage through the sand beds into the underlying unconfined sand and gravel aquifer has resulted in a plume of sewage-contaminated ground water that is 2,500 to 3,500 feet wide, 75 feet thick, and more than 11,000 feetAuthorsDenis R. LeBlancPotential hydrologic impacts of ground-water withdrawal from the Cape Cod National Seashore, Truro, Massachusetts
The hydrologic impacts of continuous ground-water withdrawals at 0.75, 1.0, and 1.24 Mgal/d (million gallons per day) from a test-well site in the Cape Cod National Seashore, Truro, Massachusetts, were evaluated with a three-dimensional finite-difference steady-state-flow digital model. The digital model was prepared during an earlier study and is only briefly described. Continuous withdrawal of mAuthorsDenis R. LeBlancDigital models of ground-water flow in the Cape Cod aquifer system, Massachusetts
The Cape Cod aquifer system was simulated with three-dimensional finite-difference ground-water-flow models. Five areas were modeled to provide tools that can be used to evaluate the hydrologic impacts of regional water development and waste disposal.The model boundaries were selected to represent the natural hydrologic boundaries of the aquifer. The boundary between fresh and saline ground waterAuthorsJohn H. Guswa, Denis R. LeBlancProgress report on hydrologic investigations of small drainage areas in New Hampshire: preliminary relations for estimating peak discharges on rural, unregulated streams
The magnitude and frequency of floods on rural, unregulated streams in New Hampshire with drainage areas between 0.27 and 622 square miles may be estimated from drainage area, main-channel slope, and a precipitation intensity index. Based on multiple-regression analyses of data from 59 gaged sites in New Hampshire and adjacent areas of bordering states, peak discharges for recurrence intervals ofAuthorsDenis R. LeBlancWater-table map of Cape Cod, Massachusetts, May 23-27, 1976
No abstract available.AuthorsDenis R. LeBlanc, John H. Guswa - News