map subsurface water Articles

  • A GIS-based methodology to delineate aquifer recharge areas

    A GIS-based methodology to delineate risk areas for contamination of groundwater resources is presented by identifying recharge conditions to the aquifer. Identifying the recharge areas is based upon surface and subsurface geologic conditions that may control the risk of potential oil spill contaminants into the aquifer. This study uses the Chicot aquifer system in southwest Louisiana as a pilot ...


    By Inderscience Publishers

  • Case study: Chevron - Intel gained from Aquatrack avoids a multi-million dollar problem

    Introduction Chevron didn’t become one of the world’s largest and most respected energy companies by following others; they got there by blazing their own trail. With their corporate commitment to being a responsible and environmentally friendly company, Chevron stands apart from their competitors by being open to new ideas. Chevron developed a new technique for ...


    By Willowstick Technologies LLC

  • Case study: RMOTC - Using existing wells, hydro-geologic barriers are mapped.

    In August of 2005, Willowstick Technologies, LLC performed an AquaTrack study at the Teapot Dome oil field near Casper, Wyoming. The project was performed together with the assistance of the Rocky Mountain Oilfield Testing Center (RMOTC), a unit of the United States Department of Energy. The purpose of the project was to demonstrate how the AquaTrack technology can be applied to ...


    By Willowstick Technologies LLC

  • An Impulse Generator for The Ground penetrating radar

    Abstract In last time ground penetrating radars (GPR) are widely used for search and analysis of varied underground objects of natural and artificial origins. Caves and cavities can also be found and investigated with the GPR's aid. Impulse generator is the key unit, which determine GPR's parameters: depth of penetrating, accuracy et al. Serial power drift diodes are used for ...


    By Transient Technologies LLC

  • Case Study: Granite Rock

    The world is changing. Consider the environment: In just a couple of decades, our knowledge of the world around us and how we affect it has caused significant shifts in the way we act. The best example of this lies with our corporate culture, as companies have to consider their impact on the world as well as their overall profitability. Industries that rely on the earth are in a precarious ...


    By Willowstick Technologies LLC

  • Electromagnetic (EMI) surveys

    EMI (EM-34) surveyDesigned and performed an EM-34 soil conductivity (soil mapping) survey of a 26-acre wood-waste landfill in Omak, Washington.  This soil mapping survey was designed to detect buried drums at a depth of 60 feet and was augmented by a total-field magnetometer survey. While employed with the Arkansas Department of Environmental Quality (ADEQ), performed approximately 40 ...


    By ECA Geophysics

  • Texas Earthen Dam Seepage Flow Path Study - Case Study

    Willowstick characterizes seepage flow paths through through the dam Background An engineering company was set to build a new outlet structure for a reservoir. They had been monitoring the dam for seepage and wanted to gain a better understanding of where seepage was occurring. Of significant importance to the client was the desire to characterize any preferential seepage ...


    By Willowstick Technologies LLC

  • Fold geometry model of Coyote hills segment of Puente hills blind-thrust system applied to interpretation of long-term water level data

    Recent work by others along the Coyote Hills segment of the Puente Hills blind-thrust system has imaged the near-surface structural features generated by activity of that intrabasin fault. Published shallow seismic profiles near the south flank of the Coyote Hills indicate the blindthrust system is expressed by south-facing folding of Quaternary terrestrial sediments underlying the hills. ...


    By Hargis + Associates Inc

  • 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 ...

  • Case study: URS - Identifying remediation locations saved hundreds of thousands

    One of the biggest threats to public health today is unsafe water. A billion people across the world don’t have access to clean drinking water, in part because many subsurface aquifers have been poisoned. Perhaps the most famous example of this was the Love Canal crisis of 1978. The Niagara Falls neighborhood experienced high rates of cancer, birth defects and other sicknesses due to ...


    By Willowstick Technologies LLC

  • Standard Chlorine of Delaware Remediation

    By designing a 70-foot deep barrier wall, Black & Veatch was able to cut off contaminant source areas from a creek near New Castle, Delaware. The groundwater treatment system that Black & Veatch designed prevents site contamination from reaching the underlying drinking water aquifer. The Standard Chlorine of Delaware Site is a 65 acre area including an abandoned chlorobenzene ...


    By Black & Veatch Corporation

  • EQuIS as the Key to Unlocking the Potential of Data - Case Study

    Polycyclic Aromatic Hydrocarbon (PAH) History Reilly Tar and Chemical 80 acre property, operated 1917-1972 Coal tar and distilled by-products discharged to ditch and peat bog through 1939 Onsite industrial well with leaky casing PAH History Reilly Tar and Chemical 1934 the city’s first water supply well ...


    By EarthSoft, Inc

  • EPA Technology News & Trends - Tacoma “Well 12A” Superfund Site

    The U.S. EPA Region 10 office uses an adaptive site management approach that relies on high-resolution site characterization (HRSC) techniques for strategic sampling at the Well 12A project area. This approximate one-square-mile project area is one of three at the 2.5-square-mile Commencement Bay-South Tacoma Channel Superfund site in Tacoma, Washington. The vicinity of Well 12A, one of 13 wells ...


    By TRS Group, Inc.

  • Wastewater Mining and Reuse: Creating Benign Future Scenarios

    Wastewater mining: In addition to being perhaps the most uninviting combination of words, it sounds like a most unlikely idea. But for almost 30 years, Aqueonics, now headquartered in Greenville, SC, has pioneered such systems, starting in the ’80s, with its first wastewater mining project. For that project, Aqueonics provided an onsite or decentralized treatment system for a developer in ...


    By Aqueonics, Inc.

  • Three ways artificial intelligence is helping to save the world

    As computers get smarter, scientists look at new ways to enlist them in environmental protection. When you think of artificial intelligence, the first image that likely comes to mind is one of sentient robots that walk, talk and emote like humans. But there’s a different kind of AI that’s becoming prevalent in nearly all of the sciences. It’s known as machine ...


    By Ensia

  • California Prepares for a Drought-Prone Future Under Stringent Title 22 Water Reuse Standards

    Fluence’s first MABR plant in mainland U.S. gives California new medium- and small-scale treatment options that comply with the state’s stringent standards for water reuse ...


    By Fluence Corporation

  • Persistent Drought Challenges Fracking

     Feature Article CleantechIQ.com - Executive Commentary Freshwater has historically been the base fluid essential for fracking, sweeping, and oil sands recovery because it has been abundant and readily available, and because of its low cost. Unfortunately, all of that is now changing due to a longer than expected global drought, and the industry is examining new options and ...


    By Biolargo, Inc.

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