Steady‐State Homogeneous Approximations of Vertical Velocity from EC Profiles |
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| Authors: | Daniel Kurtzman Lior Netzer Noam Weisbrod Ellen R. Graber Daniel Ronen |
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| Affiliation: | 1. Department of Environmental Hydrology and Microbiology, Zuckerberg Institute for Water Research, Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Sde Boker Campus 84990 Israel.;2. Hydrological Service and Water Quality Division, Israel Water Authority, POB 20365, Tel Aviv 61203 Israel. |
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| 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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