The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Georg Teutsch - One of the best experts on this subject based on the ideXlab platform.
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correction to average Contaminant Concentration and mass flow in aquifers from time dependent pumping well data analytical framework by marti bayer raich et al
Water Resources Research, 2004Co-Authors: Marti Bayerraich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] In the paper ‘‘Average Contaminant Concentration and mass flow in aquifers from time-dependent pumping well data: Analytical framework’’ by M. Bayer-Raich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, and Georg Teutsch (Water Resources Research, 40, W08303, doi:10.1029/ 2004WR003095, 2004), equation (18) was printed incorrectly: 1/2 is missing in front of the integral sign. The results and derivations presented in the paper are unaffected by this error since it is of a typographical nature; however, readers intending to use the equation in their analyses should note that the correct equation is as follows:
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Correction to “Average Contaminant Concentration and mass flow in aquifers from time-dependent pumping well data: Analytical framework” by Martí Bayer-Raich et al.
Water Resources Research, 2004Co-Authors: Marti Bayer-raich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] In the paper ‘‘Average Contaminant Concentration and mass flow in aquifers from time-dependent pumping well data: Analytical framework’’ by M. Bayer-Raich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, and Georg Teutsch (Water Resources Research, 40, W08303, doi:10.1029/ 2004WR003095, 2004), equation (18) was printed incorrectly: 1/2 is missing in front of the integral sign. The results and derivations presented in the paper are unaffected by this error since it is of a typographical nature; however, readers intending to use the equation in their analyses should note that the correct equation is as follows:
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average Contaminant Concentration and mass flow in aquifers from time dependent pumping well data analytical framework
Water Resources Research, 2004Co-Authors: Marti Bayerraich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] Conventional water samples are representative for small subsurface volumes relative to the scale of many natural (geological) heterogeneities. We present an analytical framework for estimation of representative field-scale average Concentrations and mass flows on the basis of much larger sampling volumes that are obtained through so-called integral pumping tests. The Contaminant Concentration is then measured as a function of time in a pumping well and used for estimation of the conditions in the aquifer prior to (and after) pumping, increasing the observation scale to the size of the well capture zone. This method complements (and provides an alternative to) conventional monitoring grids, where mass flow and Concentration may be misinterpreted or plumes even missed because of problems related to grid spacing. The (not measured) initial spatial Concentration distribution and the time-dependent Concentration measured at the well are related through a Volterra integral equation of the first kind. For limiting cases of short and long dimensionless pumping duration, two closed form analytical solutions are given, from which the mass flow and average Concentration can be evaluated. Furthermore, a new solution for evaluating integral pumping tests of any duration is provided and used for investigating the applicability of the simple, analytical closed form solutions for interpreting test results from seven large-scale contaminated sites in Europe.
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Average Contaminant Concentration and mass flow in aquifers from time‐dependent pumping well data: Analytical framework
Water Resources Research, 2004Co-Authors: Marti Bayer-raich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] Conventional water samples are representative for small subsurface volumes relative to the scale of many natural (geological) heterogeneities. We present an analytical framework for estimation of representative field-scale average Concentrations and mass flows on the basis of much larger sampling volumes that are obtained through so-called integral pumping tests. The Contaminant Concentration is then measured as a function of time in a pumping well and used for estimation of the conditions in the aquifer prior to (and after) pumping, increasing the observation scale to the size of the well capture zone. This method complements (and provides an alternative to) conventional monitoring grids, where mass flow and Concentration may be misinterpreted or plumes even missed because of problems related to grid spacing. The (not measured) initial spatial Concentration distribution and the time-dependent Concentration measured at the well are related through a Volterra integral equation of the first kind. For limiting cases of short and long dimensionless pumping duration, two closed form analytical solutions are given, from which the mass flow and average Concentration can be evaluated. Furthermore, a new solution for evaluating integral pumping tests of any duration is provided and used for investigating the applicability of the simple, analytical closed form solutions for interpreting test results from seven large-scale contaminated sites in Europe.
Jerker Jarsjo - One of the best experts on this subject based on the ideXlab platform.
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correction to average Contaminant Concentration and mass flow in aquifers from time dependent pumping well data analytical framework by marti bayer raich et al
Water Resources Research, 2004Co-Authors: Marti Bayerraich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] In the paper ‘‘Average Contaminant Concentration and mass flow in aquifers from time-dependent pumping well data: Analytical framework’’ by M. Bayer-Raich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, and Georg Teutsch (Water Resources Research, 40, W08303, doi:10.1029/ 2004WR003095, 2004), equation (18) was printed incorrectly: 1/2 is missing in front of the integral sign. The results and derivations presented in the paper are unaffected by this error since it is of a typographical nature; however, readers intending to use the equation in their analyses should note that the correct equation is as follows:
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Correction to “Average Contaminant Concentration and mass flow in aquifers from time-dependent pumping well data: Analytical framework” by Martí Bayer-Raich et al.
Water Resources Research, 2004Co-Authors: Marti Bayer-raich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] In the paper ‘‘Average Contaminant Concentration and mass flow in aquifers from time-dependent pumping well data: Analytical framework’’ by M. Bayer-Raich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, and Georg Teutsch (Water Resources Research, 40, W08303, doi:10.1029/ 2004WR003095, 2004), equation (18) was printed incorrectly: 1/2 is missing in front of the integral sign. The results and derivations presented in the paper are unaffected by this error since it is of a typographical nature; however, readers intending to use the equation in their analyses should note that the correct equation is as follows:
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average Contaminant Concentration and mass flow in aquifers from time dependent pumping well data analytical framework
Water Resources Research, 2004Co-Authors: Marti Bayerraich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] Conventional water samples are representative for small subsurface volumes relative to the scale of many natural (geological) heterogeneities. We present an analytical framework for estimation of representative field-scale average Concentrations and mass flows on the basis of much larger sampling volumes that are obtained through so-called integral pumping tests. The Contaminant Concentration is then measured as a function of time in a pumping well and used for estimation of the conditions in the aquifer prior to (and after) pumping, increasing the observation scale to the size of the well capture zone. This method complements (and provides an alternative to) conventional monitoring grids, where mass flow and Concentration may be misinterpreted or plumes even missed because of problems related to grid spacing. The (not measured) initial spatial Concentration distribution and the time-dependent Concentration measured at the well are related through a Volterra integral equation of the first kind. For limiting cases of short and long dimensionless pumping duration, two closed form analytical solutions are given, from which the mass flow and average Concentration can be evaluated. Furthermore, a new solution for evaluating integral pumping tests of any duration is provided and used for investigating the applicability of the simple, analytical closed form solutions for interpreting test results from seven large-scale contaminated sites in Europe.
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Average Contaminant Concentration and mass flow in aquifers from time‐dependent pumping well data: Analytical framework
Water Resources Research, 2004Co-Authors: Marti Bayer-raich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] Conventional water samples are representative for small subsurface volumes relative to the scale of many natural (geological) heterogeneities. We present an analytical framework for estimation of representative field-scale average Concentrations and mass flows on the basis of much larger sampling volumes that are obtained through so-called integral pumping tests. The Contaminant Concentration is then measured as a function of time in a pumping well and used for estimation of the conditions in the aquifer prior to (and after) pumping, increasing the observation scale to the size of the well capture zone. This method complements (and provides an alternative to) conventional monitoring grids, where mass flow and Concentration may be misinterpreted or plumes even missed because of problems related to grid spacing. The (not measured) initial spatial Concentration distribution and the time-dependent Concentration measured at the well are related through a Volterra integral equation of the first kind. For limiting cases of short and long dimensionless pumping duration, two closed form analytical solutions are given, from which the mass flow and average Concentration can be evaluated. Furthermore, a new solution for evaluating integral pumping tests of any duration is provided and used for investigating the applicability of the simple, analytical closed form solutions for interpreting test results from seven large-scale contaminated sites in Europe.
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uncertainties in Contaminant plume characterizations based on Concentration measurements in pumping wells the stuttgart neckartalaue site
IAHS-AISH publication, 2003Co-Authors: Jerker Jarsjo, Marti Bayerraich, Thomas Ptak, Thomas HolderAbstract:Contaminant Concentration-time data series from pumping wells yield relevant estimates of mass flows and Concentrations in aquifers on the field scale. We analyse uncertainties in such integral estimates, and quantify them for benzene and chlorinated hydrocarbons at the Stuttgart-Neckartalaue site, showing that the uncertainties in the boundary conditions of the model area may lead to mass flow prediction uncertainties of up to 40%. We further develop and apply a general methodology based on downgradient integral measurements, for assessing the combined effect of uncertainty in hydraulic conditions and uncertainty in reactive transport parameters on delimiting both Contaminant source zones and zones absent of source.
Marti Bayerraich - One of the best experts on this subject based on the ideXlab platform.
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correction to average Contaminant Concentration and mass flow in aquifers from time dependent pumping well data analytical framework by marti bayer raich et al
Water Resources Research, 2004Co-Authors: Marti Bayerraich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] In the paper ‘‘Average Contaminant Concentration and mass flow in aquifers from time-dependent pumping well data: Analytical framework’’ by M. Bayer-Raich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, and Georg Teutsch (Water Resources Research, 40, W08303, doi:10.1029/ 2004WR003095, 2004), equation (18) was printed incorrectly: 1/2 is missing in front of the integral sign. The results and derivations presented in the paper are unaffected by this error since it is of a typographical nature; however, readers intending to use the equation in their analyses should note that the correct equation is as follows:
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average Contaminant Concentration and mass flow in aquifers from time dependent pumping well data analytical framework
Water Resources Research, 2004Co-Authors: Marti Bayerraich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] Conventional water samples are representative for small subsurface volumes relative to the scale of many natural (geological) heterogeneities. We present an analytical framework for estimation of representative field-scale average Concentrations and mass flows on the basis of much larger sampling volumes that are obtained through so-called integral pumping tests. The Contaminant Concentration is then measured as a function of time in a pumping well and used for estimation of the conditions in the aquifer prior to (and after) pumping, increasing the observation scale to the size of the well capture zone. This method complements (and provides an alternative to) conventional monitoring grids, where mass flow and Concentration may be misinterpreted or plumes even missed because of problems related to grid spacing. The (not measured) initial spatial Concentration distribution and the time-dependent Concentration measured at the well are related through a Volterra integral equation of the first kind. For limiting cases of short and long dimensionless pumping duration, two closed form analytical solutions are given, from which the mass flow and average Concentration can be evaluated. Furthermore, a new solution for evaluating integral pumping tests of any duration is provided and used for investigating the applicability of the simple, analytical closed form solutions for interpreting test results from seven large-scale contaminated sites in Europe.
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uncertainties in Contaminant plume characterizations based on Concentration measurements in pumping wells the stuttgart neckartalaue site
IAHS-AISH publication, 2003Co-Authors: Jerker Jarsjo, Marti Bayerraich, Thomas Ptak, Thomas HolderAbstract:Contaminant Concentration-time data series from pumping wells yield relevant estimates of mass flows and Concentrations in aquifers on the field scale. We analyse uncertainties in such integral estimates, and quantify them for benzene and chlorinated hydrocarbons at the Stuttgart-Neckartalaue site, showing that the uncertainties in the boundary conditions of the model area may lead to mass flow prediction uncertainties of up to 40%. We further develop and apply a general methodology based on downgradient integral measurements, for assessing the combined effect of uncertainty in hydraulic conditions and uncertainty in reactive transport parameters on delimiting both Contaminant source zones and zones absent of source.
Thomas Ptak - One of the best experts on this subject based on the ideXlab platform.
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correction to average Contaminant Concentration and mass flow in aquifers from time dependent pumping well data analytical framework by marti bayer raich et al
Water Resources Research, 2004Co-Authors: Marti Bayerraich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] In the paper ‘‘Average Contaminant Concentration and mass flow in aquifers from time-dependent pumping well data: Analytical framework’’ by M. Bayer-Raich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, and Georg Teutsch (Water Resources Research, 40, W08303, doi:10.1029/ 2004WR003095, 2004), equation (18) was printed incorrectly: 1/2 is missing in front of the integral sign. The results and derivations presented in the paper are unaffected by this error since it is of a typographical nature; however, readers intending to use the equation in their analyses should note that the correct equation is as follows:
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Correction to “Average Contaminant Concentration and mass flow in aquifers from time-dependent pumping well data: Analytical framework” by Martí Bayer-Raich et al.
Water Resources Research, 2004Co-Authors: Marti Bayer-raich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] In the paper ‘‘Average Contaminant Concentration and mass flow in aquifers from time-dependent pumping well data: Analytical framework’’ by M. Bayer-Raich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, and Georg Teutsch (Water Resources Research, 40, W08303, doi:10.1029/ 2004WR003095, 2004), equation (18) was printed incorrectly: 1/2 is missing in front of the integral sign. The results and derivations presented in the paper are unaffected by this error since it is of a typographical nature; however, readers intending to use the equation in their analyses should note that the correct equation is as follows:
-
average Contaminant Concentration and mass flow in aquifers from time dependent pumping well data analytical framework
Water Resources Research, 2004Co-Authors: Marti Bayerraich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] Conventional water samples are representative for small subsurface volumes relative to the scale of many natural (geological) heterogeneities. We present an analytical framework for estimation of representative field-scale average Concentrations and mass flows on the basis of much larger sampling volumes that are obtained through so-called integral pumping tests. The Contaminant Concentration is then measured as a function of time in a pumping well and used for estimation of the conditions in the aquifer prior to (and after) pumping, increasing the observation scale to the size of the well capture zone. This method complements (and provides an alternative to) conventional monitoring grids, where mass flow and Concentration may be misinterpreted or plumes even missed because of problems related to grid spacing. The (not measured) initial spatial Concentration distribution and the time-dependent Concentration measured at the well are related through a Volterra integral equation of the first kind. For limiting cases of short and long dimensionless pumping duration, two closed form analytical solutions are given, from which the mass flow and average Concentration can be evaluated. Furthermore, a new solution for evaluating integral pumping tests of any duration is provided and used for investigating the applicability of the simple, analytical closed form solutions for interpreting test results from seven large-scale contaminated sites in Europe.
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Average Contaminant Concentration and mass flow in aquifers from time‐dependent pumping well data: Analytical framework
Water Resources Research, 2004Co-Authors: Marti Bayer-raich, Jerker Jarsjo, Rudolf Liedl, Thomas Ptak, Georg TeutschAbstract:[1] Conventional water samples are representative for small subsurface volumes relative to the scale of many natural (geological) heterogeneities. We present an analytical framework for estimation of representative field-scale average Concentrations and mass flows on the basis of much larger sampling volumes that are obtained through so-called integral pumping tests. The Contaminant Concentration is then measured as a function of time in a pumping well and used for estimation of the conditions in the aquifer prior to (and after) pumping, increasing the observation scale to the size of the well capture zone. This method complements (and provides an alternative to) conventional monitoring grids, where mass flow and Concentration may be misinterpreted or plumes even missed because of problems related to grid spacing. The (not measured) initial spatial Concentration distribution and the time-dependent Concentration measured at the well are related through a Volterra integral equation of the first kind. For limiting cases of short and long dimensionless pumping duration, two closed form analytical solutions are given, from which the mass flow and average Concentration can be evaluated. Furthermore, a new solution for evaluating integral pumping tests of any duration is provided and used for investigating the applicability of the simple, analytical closed form solutions for interpreting test results from seven large-scale contaminated sites in Europe.
-
uncertainties in Contaminant plume characterizations based on Concentration measurements in pumping wells the stuttgart neckartalaue site
IAHS-AISH publication, 2003Co-Authors: Jerker Jarsjo, Marti Bayerraich, Thomas Ptak, Thomas HolderAbstract:Contaminant Concentration-time data series from pumping wells yield relevant estimates of mass flows and Concentrations in aquifers on the field scale. We analyse uncertainties in such integral estimates, and quantify them for benzene and chlorinated hydrocarbons at the Stuttgart-Neckartalaue site, showing that the uncertainties in the boundary conditions of the model area may lead to mass flow prediction uncertainties of up to 40%. We further develop and apply a general methodology based on downgradient integral measurements, for assessing the combined effect of uncertainty in hydraulic conditions and uncertainty in reactive transport parameters on delimiting both Contaminant source zones and zones absent of source.
Jing Liu - One of the best experts on this subject based on the ideXlab platform.
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Numerical simulation of Contaminant transport in jointed rockmass
Yantu Lixue/Rock and Soil Mechanics, 2003Co-Authors: Q Xue, B. Liang, Jing LiuAbstract:Numerical simulation of Contaminant transport in underground jointed rockmass is a focal point in the course of disposing solid wastes and environmental assessment. Based on dual media theory, a two-dimensional numerical model has been developed for describing the transportation and transformation of Contaminants in fractured porous media, and the finite element numerical scheme is given. Taking radionuclides 90Sr as an example, the approach has been used for the simulation of groundwater flow and Contaminant transport. It predicts the temporal and spatial distribution features of Contaminant Concentration. Numerical simulation results show the pumping well Concentration research 3100 Bq/m 3 after the radionuclides 90Sr storage in the disposal repository about 40 year. The Concentration value exceeds the national standards index of pollution. It provides scientific basis for making decision of the disposal field and control and prevention of pollution.