Aquifer Articles on Environmental XPRT

The London aquifer

The aquifer beneath London is subject to a considerable number of stresses including rising groundwater levels, abstraction sustainability, artificial recharge, saline intrusion, groundwater flooding, and the growth of ground source energy. ESI has recently undertaken two key projects for the Environment Agency to aid the management of these pressures in a sustainable and cost effective ...

Oct. 8, 2011

By ESI Ltd - Environment Specialists

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 ...

Oct. 1, 2010

By IWA Publishing

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 ...

Nov. 12, 2010

By IWA Publishing

Sparta aquifer master plan

Client: Union County Water Conservation Board Completion Date: 2004 Services Provided Hydrogeologic modeling Evaluate alternative supplies Aquifer storage and recovery Dam and reservoir Wastewater reuse River supply Conservation 65-MGD river intake ...

Sep. 21, 2009

By Burns & McDonnell

Method for remediation of aquifers

The US Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of contract F41624-99 C-8033 awarded by the United States Air Force Material Command. BACKGROUND OF THE INVENTION 1. Field of the InventionThis invention relates to the remediation of contaminated ...

Aug. 5, 2008

By EOS Remediation, LLC

Union county aquifer restoration

Client: Union County Water Conservation Board Completion Date: 2003 Services Provided 65-MGD river intake Mechanically cleaned bar screen Two traveling water screens Quarter-mile-long access bridge with service deck Four 15,050 gpm vertical turbine intake pumps 48-inch raw water ...

Sep. 21, 2009

By Burns & McDonnell

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 ...

Jan. 1, 2006

By Springer

Aquifer storage & recovery

Client: City of Wichita, Kansas Completion Date: November 2001 Services Provided Program management Hydrogeological engineering Water quality monitoring Design criteria development Water accounting system Public information program Permitting agency reviews ...

Sep. 19, 2009

By Burns & McDonnell

Abandon Well Contaminate Aquifer

This article points out the magnitude of this urgent issue. An abandoned well becomes an opening into an aquifer which is likely to introduce contamination. Filling it in is a critical component of protecting the well water supply. Click here to read the ...

May 12, 2015

By Environmental Testing and Research Laboratories, Inc

Locating Groundwater Wells for Fracking Operations in West Texas - Case Study

In June 2014, our clients used AGI resistivity imaging tools to successfully locate a 125-gallon-per-minute groundwater well in West Texas as well as geohazards that could, if left unlocated, cause significant damage to property and increase costs. Process Our clients used the ...

Jun. 15, 2017

By Advanced Geosciences, Inc.

Mapping of freshwater aquifers case study

Big Pine Key, Florida The Nature Conservancy is coordinating investigations to document the physical and biological changes that will occur on small oceanic islands as a result of sea level rise. Big Pine Key, FL is one of the primary areas of investigation because of extensive previous work and that a large portion of the island is a National Wildlife Refuge and therefore not subject to ...

Jan. 17, 2014

By GeoView, Inc.

Virus Transport Experiments in a Sandy Aquifer

Abstract The occurrence of human enteric viruses in ground water has been well documented in the literature. Bacteriophages such as MS-2 and PRD1 have properties similar to pathogenic human viruses suggesting that bacteriophages can be used as proxies for virus transport. The objective of this study is to investigate a “worst case scenario” for virus transport in a ground water aquifer, ...

Dec. 31, 2005

TCE Remediation in Saprolite and Bedrock Aquifers

Site Summary Subsurface investigations at this operating manufacturing facility revealed TCE contamination in saprolite and bedrock aquifers. The complicated site geology created the need for a remedial strategy effective in tight soil and fractured bedrock. Accelerated bioremediation using HRC was selected for a pilot study because its use offered a remedial method that would not interrupt ...

Jan. 1, 2004

By REGENESIS

Mathematical modeling for solute transport in aquifer

Groundwater pollution may occur due to human activities, industrial effluents, cemeteries, mine spoils, etc. This paper deals with one-dimensional mathematical modeling of solute transport in finite aquifers. The governing equation for solute transport by unsteady groundwater flow is solved analytically by the Laplace transform technique. Initially, the aquifer is subjected to the spatially ...

Oct. 29, 2015

By IWA Publishing

Comparison of Reducing Agents for Dechlorination in a Simulated Aquifer (PDF)

A simulated aquifer system (Aquifer Simulation Vessel – ASV) was used to study the efficacy of various reducing agents to assist microbial dechlorination. The soil samples are homogenized and the soil is packed into 6.0-foot long tubes with an internal diameter of 5.75 inches. Flow rates can be calibrated for flow at 0.1 to 2.0 feet/day. The system has a volume of 2025.44 in3. A solution of ...

Jan. 1, 2001

By REGENESIS

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 ...

Feb. 24, 2014

By Inderscience Publishers

Fate of selected pharmaceuticals and their metabolites in soil aquifer treatment

Through a series of long-term column experiments, the fate of three common pharmaceuticals (carbamazepine (CBZ), diclofenac, and indomethacin) and their major phase I metabolites in soil aquifer treatment (SAT) were monitored. CBZ concentration increased by a factor of two (from 37 to ca. 70 ng/L) regardless of the treatment conditions, and its metabolites, ...

Apr. 25, 2016

By IWA Publishing

The chemical evolution of groundwater in the Kerman plain aquifer, Iran

A comprehensive hydrogeochemical study was carried out in the Kerman Plain Aquifer, Iran. Groundwater samples were collected from 58 sites. Groundwater was analysed for major constituents (Na+, K+, Ca2+, Mg2+, Cl−, SO42− HCO3−. Different methods including composite diagrams, saturation indices and ...

Feb. 11, 2013

By Inderscience Publishers

Identification of Naegleria fowleri in warm ground water aquifers

Received for publication February 16, 2009. The free-living amoeba Naegleria fowleri was identified as the etiological agent of primary amoebic meningoencephalitis that caused the deaths of two children in Peoria, Arizona, in autumn of 2002. It was suspected that the source of N. fowleri was the domestic water supply, which originates from ground water sources. In this study, ground water from ...

Jan. 1, 2010

By Soil Science Society of America (SSSA)

DOD evaluates bioaugmentation for remediating low-pH aquifers

The US Department of Defense (DOD) has completed pilot-scale work on the 'MAG-1' site at Fort Dix, NJ, to test suitability of anaerobic bioremediation for an aquifer with low pH. Project results will be used to design full-scale ground-water treatment at MAG-1. In addition, technical criteria gained from the demonstration will be integrated into DOD’s remediation strategy for its many facilities ...

Mar. 30, 2009

By The Hazardous Waste Clean-Up Information (CLU-IN)

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