Vadose Zone Articles

  • Water dynamics and groundwater recharge in a deep vadose zone

    Understanding soil water dynamics and accurately estimating groundwater recharge are essential steps in achieving efficient and sustainable management of groundwater resources in regions with deep vadose zones. The objective of this study was to understand transient data and the dynamics nature of water from deep sections at the thick vadose zone, and to estimate groundwater recharge by ...


    By IWA Publishing

  • Improved light-transmission method for the study of LNAPL migration and distribution rule

    In this study, diesel was selected as a pollutant to study the migration and distribution rule of light non-aqueous phase liquid (LNAPL) in the simulated vadose zone. Saturation was regarded as a critical parameter to reflect the LNAPL migration and distribution rule. To get LNAPL saturation distribution figures, an image processing method of saturation was established to improve ...


    By IWA Publishing

  • Migration and transformation behavior of volatile phenol in the vadose zone

    Research on the migration and transformation of phenol with space and temporal variability in the vadose zone is hindered by monitoring technology in field experiments. Four column experiments were conducted to investigate the effect of porous media size, volatilization, biological effects, and oxidation on the transport of phenol in the vadose zone. The initial inflow phenol concentration of ...


    By IWA Publishing

  • Physically based closed-form expression for the bimodal unsaturated hydraulic conductivity function

    Simulation of flow and contaminant transport through the vadose zone requires accurate parameterization of the soil hydraulic properties. This requirement is particularly important for soils with a complex structure. In the present study, a physically based closed-form expression for the bimodal unsaturated hydraulic conductivity function is proposed for soils with bimodal pore-size ...


    By IWA Publishing

  • Field-Scale Application of Oxygen Releasing Compound in Deep Vadose Soils

    Summary Paz Kibutz Galuyot is a large gas-station that underwent complete renovation of its infrastructure, as well as remediation of the contaminated saturated and unsaturated zones, under the old tank farm and dispensers. The remediation project has started after one of the tanks in the old tank farm failed tightness test and appeared to contaminate the unsaturated zone down to ...


  • Vadose zone modeling of dispersed waste sites in the framework of an integrated stochastic environmental transport and impacts assessment code for the Hanford Site

    The system assessment capability (SAC) is the first total-system stochastic simulator to address inventory distribution, environmental release and transport, and impacts to human health and ecological, economic, and cultural resources from hundreds of radiological and chemical waste disposal sites for the entire Hanford Site in southeast Washington State. Flow and contaminant transport modeling ...


    By Springer

  • Water quality dependence on the depth of the vadose zone in SAT-simulated soil columns

    ABSTRACTThree soil aquifer treatment (SAT) columns were operated for five months to investigate the dependence of the treated water quality upon the depth of unsaturated vadose zone in terms of its organics, nitrogen and phosphorus contents. It was found that DOC removal was independent of the unsaturated vadose zone depth except during the initial flooding period when the effluent was injected ...


    By IWA Publishing

  • Groundwater Remediation Strategies Tool

    This guide provides strategies for focusing remediation efforts on 1) the change in contaminant mass flux in different subsurface transport compartments (e.g. the vadose zone, smear zone or a zone within an aquifer of interest) and 2) the change in remediation timeframe. In this approach, groundwater flow and contaminant concentration data are combined to estimate the rate of contaminant mass ...


    By Solinst Canada Ltd.

  • Role of the biotic compartment in the transfer of zinc through the vadose zone - application to an infiltration system

    ABSTRACTRelatively little is known about the influence of microorganisms which develop in urban stormwater infiltration basins on the transfer of heavy metals, whereas many reports have emphasized their importance in the mechanisms of retention or solubilization of these elements. We therefore examined the transfer of zinc solutions (2-20 ppm) at different pH (4-7) by columns of sterile sand or ...


    By IWA Publishing

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