Slug Testing Articles

  • Simple methods for quick determination of aquifer parameters using slug tests

    The slug test is still one of the simplest and cost-effective methods to interpret the hydraulic parameters for aquifer analysis. This study introduces two new estimation approaches for the slug test, the time shift method (TSM) and arc-length matching method (AMM), to identify aquifer parameters in a reliable and accurate manner, which was established on the idea that any change in the ...


    By IWA Publishing

  • What’s the Temperature? Thermal Modeling and its Importance in Thermal Remediation

    What is a model? A beautiful person who struts down a run way, a scaled down sculpture of the Empire State Building, or a series of equations that describe some phenomenon? Did you guess all of the above? Gold star! Models come in many different shapes and sizes. In the environmental consulting and remediation industry, the word “model” often refers to a numerical model. Numerical ...

  • Partially penetrating slug tests in an unweathered till layer

    This research improves field based estimates of aquitard compressibility and permeability. A semianalytical model of partially penetrating, overdamped slug tests achieves this objective. The short term solution is an existing fully penetrating model, the long term solution is the polar residue of an inverse Laplace transform, and an exponential spline function patches the solutions together. ...


    By IWA Publishing

  • Water Level Measurements-Part 1

    Confused about which instrumentation to use in your water level monitoring system? In-Situ offers two categories of pressure sensors for water level measurements: absolute or non-vented sensors, and gauged or vented sensors. They look the same and both measure pressure and water level, but they have drastically different applications, outputs and accuracy. The absolute (or non-vented) water level ...


    By In-Situ, Inc.

  • ASC Tech Services

    Environmental contamination is risky business, to access risk, high-tech and unique geophysical site characterization methods can be employed. By utilizing these high tech gadgets that describe the ground and detail exactly what can’t be seen. Just like the Silicon Valley, new methods have surfaced and now more than ever it is easy to characterize the subsurface using direct push tools. ...


    By ASC Tech Services

  • Ozonation of endogenous residue and active biomass from a synthetic activated sludge

    Coupling the activated sludge and the ozonation processes is an efficient, although expensive, solution for sludge reduction. A better knowledge of the mechanisms involved in the degradation of various sludge fractions by ozone is needed to optimize the coupled process. The objectives of this study were to determine the biodegradability of ozone-solubilized endogenous residue, the action of ozone ...


    By IWA Publishing

  • Hydrogeochemical and biological processes affecting the long-term performance of an iron-based permeable reactive barrier

    Received for publication November 29, 2007. Despite the wide diffusion of zero-valent iron (Fe0) permeable reactive barriers (PRBs), there is still a great uncertainty about their longevity and long-term performance. The aim of this study is to investigate the biological and the hydrogeochemical processes that take place at a Fe0 installation located in Avigliana, Italy, and to derive some ...

  • Groundwater Flow in Arsenic-Contaminated Aquifer, Mekong Delta, Cambodia

    ABSTRACT To advance understanding of hydrologies I influences on As concentrations within groundwaters of Southeast Asia, the flow system of an As-rich aquifer on the Mekong Delta in Cambodia where flow patterns have not been disturbed by irrigation well pumping was examined. Monitoring of water levels in a network of installed wells, extending over a 50knr area, indicates that groundwater ...


    By In-Situ, Inc.

  • Assessing the transport and fate of MTBE

    Untitled Document ...


    By Solinst Canada Ltd.

  • Data Requirements for Ground Water, Surface Water, and Leachate

    It is common for ground water to be contaminated with the water soluble substances found in overlying soils. Many of the required data elements are similar, e.g., pH, TOC, BOD, COD, oil and grease, contaminant identification and quantification, and soil and aquifer characterization. Additional water quality monitoring data elements include hardness, ammonia, total dissolved solids, and metals ...

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