aquifer characterization Articles
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Application Spotlight: Denver CO uses magnetic resonance to manage aquifer storage and recovery (ASR)
Magnetic resonance (NMR) logging is well suited for helping manage aquifer storage and recovery (ASR) projects. An excellent example is this project in Denver Colorado, in which they used Vista Clara NMR borehole logging tools to characterize the Denver basin aquifer properties, especially hydraulic conductivity, for potential aquifer storage and recovery. The aquifers of interest are ...
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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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Identification of groundwater contamination zone around a reclaimed landfill using carbon isotopes
Chemical and isotopic analyses of groundwater from piezometers localized around a reclaimed landfill were performed in order to identify the boundaries of groundwater contamination zone. Spatial distribution of dissolved inorganic carbon (DIC) concentration and stable carbon isotopes in the groundwater was used to distinguish the piezometers localized within the contaminated aquifer. Background ...
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Direct-Push Injection and Circulation Biobarrier to Remediate a TCE Groundwater Plume
ABSTRACT: The goal of this study was to determine if direct-push drilling methods combined with a circulation system could be used to establish a passive biobarrier in a very transmissive aquifer to treat tricholoroethene (TCE). The Site is located in central Indiana, where historic use of TCE has impacted an unconfined aquifer. A plume consisting primarily of TCE has migrated from west to east ...
By Redox Tech
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Dye Tracing Illuminates Pathways through Mammoth Cave National Park
Overview Researchers from Crawford Hydrology Laboratory are conducting dye tracing studies of the Great Onyx Basin in Mammoth Cave National Park, Kentucky, to enhance our understanding of karst hydrogeology and lay the groundwork for future studies on sustainable practices in the park and the role of karst landscapes in the carbon cycle. Challenge Extensive dye tracing studies in the 1970s and ...
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Advantages of NMR vs ERT for Characterizing Aquifers in Highly Saline Environments
One of the more challenging situations in geophysics is the need to identify and characterize aquifers in highly saline environments. Saline environments are inherently conductive, which means conventional Electrical Resistivity Tomography (ERT) techniques are less effective because the ERT signals don’t penetrate very far into highly conductive ground and the contrasts between water 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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Estimation of baseflow recession constants and effective hydraulic parameters in the karst basins of southwest China
By analysing the hydrographs of karst basin outflow, it is possible to identify aquifer characteristics and, accordingly, the main features of a karst basin. In this study, 19 basins with daily observed flow discharges during drought periods between October and April 1973–1983 were selected to analyse the master recession curve (MRC). During a drought period, the MRCs were separated into segments ...
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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 ...
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In Situ Thermal Treatment for Soil, Sediment, and Sludge
The main advantage of in situ thermal treatment is that it allows soil to be treated without being excavated and transported, resulting in significant cost savings. However, in situ treatment generally requires longer time periods, and there is less certainty about the uniformity of treatment because of the variability in soil and aquifer characteristics and because the efficacy of the process is ...
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Hydrogeology Practitioner Spotlight--Wayne Hutchinson
Name: Wayne Hutchinson Office: Milwaukee Practice Area: Environmental Liability Management Area of expertise: Hydrogeology About Me in 140 Characters (or more!): I suppose I was drawn to a career in science, and specifically hydrogeology, because it allows me to use and apply mathematics, chemistry and physics to solve three-dimensional puzzles. And, as it turns out, it was also the perfect ...
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In Situ Physical/Chemical Treatment for Soil, Sediment, and Sludge
The main advantage of in situ treatment is that it allows soil to be treated without being excavated and transported, resulting in potentially significant cost savings. However, in situ treatment generally requires longer time periods, and there is less certainty about the uniformity of treatment because of the variability in soil and aquifer characteristics and because the efficacy of the ...
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GoForth, NC Case Study
ABSTRACT Trap & Treat® BOS 200® was used to remediate petroleum hydrocarbon impacted groundwater within fractured bedrock and overburden soil at a former retail gasoline site in North Carolina. After a thorough remedial design characterization was completed, BOS 200® was surgically injected over two field events to successfully achieve the site cleanup goals. CHALLENGES The ...
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Microbiological assessment of private groundwater-derived potable water supplies in the Mid-West Region of Ireland
Determining the likelihood that groundwater contains faecal coliforms can aid water resource management in facilitating the protection of drinking water supplies. This study assesses the incidence of the faecal indicator organism Escherichia coli in 125 private water supplies (PWSs) serving individual houses in the Mid-West Region of Ireland. Two factors, aquifer type and rainfall (mm), were ...
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In Situ Biological Treatment for Soil, Sediment, and Sludge
The main advantage of in situ treatment is that it allows soil to be treated without being excavated and transported, resulting in potentially significant cost savings. However, in situ treatment generally requires longer time periods, and there is less certainty about the uniformity of treatment because of the variability in soil and aquifer characteristics and because the efficacy of the ...
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In Situ Physical/Chemical Treatment for Ground Water and Leachate
The main advantage of in situ treatments is that they allow ground water to be treated without being brought to the surface, resulting in significant cost savings. In situ processes, however, generally require longer time periods, and there is less certainty about the uniformity of treatment because of the variability in aquifer characteristics and because the efficacy of the process is more ...
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In Situ Biological Treatment for Ground Water, Surface Water, and Leachate
The main advantage of in situ treatment is that it allows ground water to be treated without being brought to the surface, resulting in significant cost savings. In situ treatment, however, generally requires longer time periods, and there is less certainty about the uniformity of treatment because of the variability in aquifer characteristics and because the efficacy of the process is more ...
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Characterising aquifer treatment for pathogens in managed aquifer recharge
In this study the value of subsurface treatment of urban stormwater during Aquifer Storage Transfer Recovery (ASTR) is characterised using quantitative microbial risk assessment (QMRA) methodology. The ASTR project utilizes a multi-barrier treatment train to treat urban stormwater but to date the role of the aquifer has not been quantified. In this study it was estimated that the aquifer barrier ...
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Characterising aquifer treatment for pathogens in managed aquifer recharge
In this study the value of subsurface treatment of urban stormwater during Aquifer Storage Transfer Recovery (ASTR) is characterised using quantitative microbial risk assessment (QMRA) methodology. The ASTR project utilizes a multi-barrier treatment train to treat urban stormwater but to date the role of the aquifer has not been quantified. In this study it was estimated that the aquifer barrier ...
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Large TCE Plume with Extensive DNAPL - Case Study
ABSTRACT High density sampling program was key to remediation of soil and groundwater impacted by TCE DNAPL at a former industrial site underlain by river deposits and sedimentary bedrock. CHALLENGES Impacted alluvium consisted of poorly sorted, fine to coarse grained sand. The source area was underlain by an aquitard of silt and clayey silt where dense non-aqueous phase liquid (DNAPL) pooled ...
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