aquifer Articles | 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. 7, 2011

By ESI Consulting Ltd

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. 4, 2008

By EOS Remediation, LLC

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. 18, 2009

By Burns & McDonnell

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 ...

Sep. 30, 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. 11, 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. 20, 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 ...

Dec. 31, 2005

By Springer

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. 20, 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 11, 2015

By Environmental Testing and Research Laboratories, 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. 16, 2014

By GeoView, Inc.

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. 28, 2015

By IWA Publishing

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 ...

Dec. 31, 2003

By Regenesis

Interconnectivity between the Superficial Aquifer and the Deep Confined Aquifers of the Gnangara Mound, Western Australia

Perth groundwater resources are obtained from three major aquifers that occur beneath the Perth metropolitan area: the Superficial aquifer, Leederville aquifer and Yarragadee aquifer. Each aquifer has a unique seasonal water level pattern controlled by soils, geomorphology and geology. Landuse is mainly responsible for variations in recharge; however, the hydraulic properties control aquifer ...

Dec. 31, 2004

By Springer

Interconnectivity between the Superficial Aquifer and the Deep Confined Aquifers of the Gnangara Mound, Western Australia

Perth groundwater resources are obtained from three major aquifers that occur beneath the Perth metropolitan area: the Superficial aquifer, Leederville aquifer and Yarragadee aquifer. Each aquifer has a unique seasonal water level pattern controlled by soils, geomorphology and geology. Landuse is mainly responsible for variations in recharge; however, the hydraulic properties control aquifer ...

Jan. 31, 2005

By Springer

Estimating contaminant-flushing rates for heterogeneous aquifers

Groundwater remediation evaluations typically include cleanup time projections. Current batch flushing-rate equations and analytical models often used to estimate groundwater cleanup rates typically underestimate cleanup times, with a major factor the flawed assumption of aquifer homogeneity. Numerical modelling of groundwater flow and contaminant transport is a time-intensive and costly ...

Jun. 26, 2007

By Inderscience Publishers

A transboundary aquifer of potential concern in Southern Africa

Tuli Karoo transboundary aquifer (TBA) is shared between Botswana, South Africa and Zimbabwe in the Southern African Development Community (SADC) region. The TBA provides groundwater resources for various economic activities. Irrespective of the value offered by this TBA, there is very little research that has been conducted to improve understanding of the physical system and potential ...

Dec. 31, 2016

By IWA Publishing

Natural background levels for chemicals in Icelandic aquifers

Information about natural background levels (NBLs) of chemicals in source waters allows water utilities to identify trends in drinking water contamination. We estimate NBLs for chemicals in source waters for Icelandic water utilities at both national levels with all data pooled, and according to geological regime. NBLs were derived by collecting samples from 79 aquifers considered largely ...

Jul. 19, 2015

By IWA Publishing

In Situ Dechlorination of TCE during Aquifer Heating

Laboratory and field efforts were undertaken to examine trichloroethene (TCE) dechlorination as a function of temperature as an aquifer is heated to temperatures approaching boiling. Experiments were conducted using sediment samples and during electrical resistance heating (ERH) treatment at the East Gate Disposal Yard (Fort Lewis, Washington), which contains nonaqueous phase TCE and hydrocarbon ...

Mar. 31, 2007

By TRS Group, Inc.

Mapping of freshwater aquifers by GeoView case study

Big Pine Key, Florida The Nature Conservancy is studying the physical and biological changes that will occur on small oceanic islands as a result of sea level rise. Big Pine Key, Florida is one of the primary areas of investigation because of extensive previous work on the key and because a large portion of the island is a National Wildlife Refuge. As part of the investigation, GeoView ...

Jan. 17, 2014

By GeoView, Inc.

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. 24, 2016

By IWA Publishing

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