Steady-State Homogeneous Approximations of Vertical Velocity from EC Profiles

Daniel Kurtzman; Lior Netzer; Noam Weisbrod; Ellen R. Graber; Daniel Ronen

doi:10.1111/j.1745-6584.2010.00720.x

Steady-State Homogeneous Approximations of Vertical Velocity from EC Profiles

Daniel Kurtzman, Lior Netzer, Noam Weisbrod, Ellen R. Graber, Daniel Ronen

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Electrical conductivity (EC) logs were obtained by both open-borehole logging and passive multilevel sampling (MLS) in an observation borehole penetrating the Coastal Aquifer in Tel Aviv, Israel. Homogeneous vertical velocities for a 70-m thick subaquifer were approximated from each profile using a steady-state advection-diffusion model. The open-borehole log led to an overestimation of the steady-state upward advective flux of deep brines (vertical velocity of 0.95 cm/yr as compared to 0.07 cm/yr for the MLS profile). The combination of depth-dependent data and the suggested simple modeling approach comprises a method for assessing the vertical location of salinity sources and the nature of salt transport from them (i.e., advective vs. diffusive). However, in this case, the easily obtained open-borehole logs should not be used for collecting depth-dependent data.

Original language	English
Pages (from-to)	275-279
Number of pages	5
Journal	Ground Water
Volume	49
Issue number	2
DOIs	https://doi.org/10.1111/j.1745-6584.2010.00720.x
State	Published - 1 Mar 2011

ASJC Scopus subject areas

Water Science and Technology
Computers in Earth Sciences

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10.1111/j.1745-6584.2010.00720.x

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title = "Steady-State Homogeneous Approximations of Vertical Velocity from EC Profiles",

abstract = "Electrical conductivity (EC) logs were obtained by both open-borehole logging and passive multilevel sampling (MLS) in an observation borehole penetrating the Coastal Aquifer in Tel Aviv, Israel. Homogeneous vertical velocities for a 70-m thick subaquifer were approximated from each profile using a steady-state advection-diffusion model. The open-borehole log led to an overestimation of the steady-state upward advective flux of deep brines (vertical velocity of 0.95 cm/yr as compared to 0.07 cm/yr for the MLS profile). The combination of depth-dependent data and the suggested simple modeling approach comprises a method for assessing the vertical location of salinity sources and the nature of salt transport from them (i.e., advective vs. diffusive). However, in this case, the easily obtained open-borehole logs should not be used for collecting depth-dependent data.",

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AU - Kurtzman, Daniel

AU - Netzer, Lior

AU - Weisbrod, Noam

AU - Graber, Ellen R.

AU - Ronen, Daniel

PY - 2011/3/1

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N2 - Electrical conductivity (EC) logs were obtained by both open-borehole logging and passive multilevel sampling (MLS) in an observation borehole penetrating the Coastal Aquifer in Tel Aviv, Israel. Homogeneous vertical velocities for a 70-m thick subaquifer were approximated from each profile using a steady-state advection-diffusion model. The open-borehole log led to an overestimation of the steady-state upward advective flux of deep brines (vertical velocity of 0.95 cm/yr as compared to 0.07 cm/yr for the MLS profile). The combination of depth-dependent data and the suggested simple modeling approach comprises a method for assessing the vertical location of salinity sources and the nature of salt transport from them (i.e., advective vs. diffusive). However, in this case, the easily obtained open-borehole logs should not be used for collecting depth-dependent data.

AB - Electrical conductivity (EC) logs were obtained by both open-borehole logging and passive multilevel sampling (MLS) in an observation borehole penetrating the Coastal Aquifer in Tel Aviv, Israel. Homogeneous vertical velocities for a 70-m thick subaquifer were approximated from each profile using a steady-state advection-diffusion model. The open-borehole log led to an overestimation of the steady-state upward advective flux of deep brines (vertical velocity of 0.95 cm/yr as compared to 0.07 cm/yr for the MLS profile). The combination of depth-dependent data and the suggested simple modeling approach comprises a method for assessing the vertical location of salinity sources and the nature of salt transport from them (i.e., advective vs. diffusive). However, in this case, the easily obtained open-borehole logs should not be used for collecting depth-dependent data.

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Steady-State Homogeneous Approximations of Vertical Velocity from EC Profiles

Abstract

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