aquifer testing Articles
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Numerical evaluation of pumping well transmissivity estimates in laterally heterogeneous formations
Transmissivity estimates derived from non-steady-state, single well, constant discharge, aquifer tests in laterally heterogeneous environments generally are questioned relative to their representativeness of aquifer conditions. Drawdown in pumping wells reflects the removal of water from storage in the aquifer and transient refraction of groundwater path-lines during the evolution of a ...
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WMU Field Course Preps Future Hydrogeologists with Hands-On Experience
Overview Students from around the country sign up for the Hydrogeology Field Course at Western Michigan University in order to gain experience with equipment and applications that will prepare them for the workplace in ways a textbook never could. Challenge In a competitive job market, it stands to reason that students who graduate with the most practical experience in their field will have an ...
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Assessing transmissivity from specific capacity in an alluvial aquifer in the middle Venetian plain (NE Italy)
Defining aquifer permeability distribution accurately over large areas is often debated in hydrogeology. The operational efforts to calculate hydraulic conductivity with classical aquifer tests are significant; however, accurate knowledge of permeability areal distribution is fundamental both from a hydrogeological and a modeling standpoint. This paper presents an empirical relationship between ...
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Las Flores basin hydrogeology, camp Pendleton marine corps base, San Diego County, California.
The Las Flores basin is located in northwest San Diego County, California, on the Camp Pendleton Marine Corps base. The Las Flores basin is one of four groundwater basins that supply drinking water to Camp Pendleton. Groundwater in the Las Flores basin is extracted from the alluvial aquifer and the San Mateo aquifer located in the coastal basin. The San Mateo aquifer is overlain by unconsolidated ...
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Remote monitoring of groundwater pollution using geo-electric techniques in undulating sandy terrain, Western Australia
Early-time transient electromagnetic sounding (TEM) and DC resistivity sounding techniques have been used to monitor remotely the changes with time of a groundwater pollution plume at a test site on a sand aquifer. A range of techniques for interpretation of TEM sounding data have been evaluated. All of these were successful in identifying expansion of the plume. The most plausible interpretation ...
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Investigating cross-contamination of aquifers
Shallow aquifers can cross-contaminate deeper aquifers through penetration of an intervening aquitard, via sandy intervals in the aquitard, along well casings, across long well screens, or around aquitard pinchouts. Distinguishing among these potential pathways requires the use of evaluation tools that may support or eliminate certain pathways. These tools include groundwater gradient and ...
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Data Types in Environmental Data Management
ESdat is a specialist environmental database system; used to validate and import a broad spectrum of Environmental Data and to help users analyze and report it. ESdat can manage many types of environmental data including the following:Laboratory ResultsAutomated import of laboratory dataStore certified PDF copies of lab reportImport all QA data (blanks, duplicates,holding times etc..)Most ...
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Ethanol Production Plant Monitors Impacts to Water Supply and Stays in Compliance
Application Under current ethanol plant configurations, water use for ethanol production ranges from 4.0 to 6.8 gallons of water required per gallon of ethanol produced. With the average new plant producing 120 million gallons of ethanol per year, water yields in excess of 1,000 gallons per minute are required; therefore adequate water supply is essential to the operation of an ethanol production ...
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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 ...
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Landfill site characterisation at Kham Bon village, Muang district, Khon Kaen province, NE Thailand
The aim of the study is to characterise the Kham Bon landfill site. Hydrogeological and geochemical surveys were conducted and four boreholes were drilled. The hydraulic properties of the aquifer were tested, and soil, surface water and groundwater samples were collected at various times in the year. The physical and chemical properties of the samples, especially heavy metals, were analysed. The ...
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Meeting Melbourne's future demand for water using aquifer storage and recovery
Melbourne is one of the fastest growing cities in Australia. City West Water (CWW) has developed an Integrated Water Cycle Management (IWCM) Strategy which includes the development of aquifer storage and recovery (ASR) schemes to store recycled water and storm water to assist with meeting future growth, where these schemes can be demonstrated to be viable and cost effective. The investigation ...
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Optimization of EVO delivery improves enhanced reductive dechlorination of groundwater
Optimization of an emulsified vegetable oil (EVO) delivery system led to uniform distribution and ongoing biological treatment of a PCE source area last summer at the former Naval Training Center (NTC) in Orlando, FL. Remedial efforts targeted contaminated ground water at a former laundry and dry cleaning facility at NTC's Operable Unit 4 (OU4), where earlier injections of potassium permanganate ...
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Example of water level data logger use - case study
Geo Kamp Limited is pleased to present a typical hydrogeologic project using Heron Water Level Data Loggers (referred to as the dipperLog). The accompanying hydrographs represent the data collected for a Test Well located near Lake Simcoe (north of Toronto) in 2010. It was difficult to coordinate the schedule of the water well contractor due to inclement weather (bitterly cold) and the project ...
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Project - Updated Wellfield Vulnerability Analysis for the Keene Heights Wells
Client: Trent Conservation Coalition Drinking Water Source Protection – Lower Trent Conservation: Ms. Andrea Hicks, 714 Murray Street, R.R. #1, Trenton, ON K8V 5P4 Key Personnel: E.J. Wexler Earthfx Incorporated delineated wellhead protection areas (WHPA) for all municipal wells within the Trent Conservation Coalition Drinking Water Source Protection Region. Included in this ...
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Why You Should Monitor Groundwater?
What is groundwater? Groundwater is water that is stored below the earth’s surface. When rain or other sources of water come into contact with the ground, the majority of it travels below the surface. Though much of this moisture is then absorbed by plants or returned to the atmosphere (through infiltration), some water will travel deeper beneath the surface – where it reaches and ...
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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 ...
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In Situ Chemical Oxidation Remediation Pilot Study Of A Karst Bedrock Aquifer Contaminated With Chlorinated Solvents
ABSTRACT A pilot study to evaluate an innovative in situ treatment technology was implemented at Letterkenny Army Depot, Chambersburg, Pennsylvania, for a limestone bedrock aquifer contaminated with chlorinated solvents. This technology destroys VOCs in groundwater, utilizing a network of injection points to deliver a solution of hydrogen peroxide (50%), catalysts, and surfactants. The ...
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Bee Branch Creek Restoration Project - Case Study
Project Location: Dubuque, Iowa Owner: Upper Bee Branch Creek-Channel, Streets, and Utilities GC: Tschiggfrie Excavating Project Revenue: 200,000,000 Project Start and End Date: July 2015 SUMMARY The City of Dubuque’s Bee Branch Creek Restoration Project was awarded a 2018 Eddy Award. The annual Eddy Awards are presented to those who have made the Mississippi River a ...
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Assessing the transport and fate of MTBE
Untitled Document Abstract The ether oxygenates MTBE and TAME have been used in petroleum fuel formulations in the UK since the mid-1980s and have led to contamination of major aquifers with these chemicals, including the Chalk aquifer of southern England. An assessment is made of the controls on the fate of MTBE and BTEX compounds at a contaminated site on the Chalk aquifer, ...
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