aquifer testing Articles

  • 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 ...


    By Springer

  • 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 ...


    By IWA Publishing

  • 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 ...

  • 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 ...

  • 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 ...

  • 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 ...


    By IWA Publishing

  • Sensitivity of groundwater flow with respect to the drain–aquifer leakage coefficient

    Mitigation measures may be used to prevent soil and water pollution from waste disposal, landfill sites, septic or chemical storage tanks. Among them, drains and impervious barriers may be set up. The efficiency of this technique can be evaluated by means of groundwater modeling tools. The groundwater flow and the leakage drain–aquifer interactions are implemented in a conforming finite ...


    By IWA Publishing

  • Impact on Gaza aquifer from recharge with partially treated wastewater

    The Gaza Strip suffers from high pressure imposed on its water resources. There is a deficit of about 50 mm3 every year, which has led to a declination of groundwater level and deterioration of groundwater quality. New water resources are sought to fulfil the water deficit; among them is the artificial recharge of treated wastewater to groundwater. The impact of recharging partially treated ...


    By IWA Publishing

  • Reclaimed Water Aquifer Storage and Recovery: Potential Changes in Water Quality

    Aquifer storage recovery (ASR) operations recharge and recover water through the same well or wells, creating a “bubble” of stored water that typically mixes minimally with ambient groundwater once the storage zone has been developed. Because ASR recharge water does not flow through a vadose zone and is not drawn through an aquifer to a distant point of withdrawal, changes in water quality that ...

  • Tracer test and behavior of selected pharmaceuticals

    Study of the behavior and transport of pharmaceuticals in groundwater is significant for understanding the processes of natural attenuation and potential use of filtration through the aquifer to evaluate the most effective way to remove pharmaceuticals that occur under anthropogenic influence. This paper presents the results of a field experiment at the location of the drainage system of ...


    By IWA Publishing

  • Answers to questions about oil waste in California aquifers

    California, the country's third-largest oil-producing state, has improperly given oil companies more than 2,500 permits to inject production fluids and oilfield waste into underground water supplies that are used for drinking water or irrigation, state records show. Nearly half of those disposal wells were approved or first started injections in the last four years under Gov. Jerry Brown, an ...


    By Associated Press

  • A refined groundwater flow model of the shallow aquifer in Tianjin Municipality, China

    The assembly of a groundwater flow model for the shallow aquifer in Tianjin Municipality is outlined in this paper. Tianjin Municipality was selected because of its complicated hydrogeological conditions and rich data, which could be used to test a refined groundwater flow model for the shallow aquifer. When a shallow groundwater flow model is being assembled its recharge and discharge ...


    By IWA Publishing

  • Evaluating the Vulnerability of Bored and Driven Wells in a Shallow Unconfined Aquifer

    Shallow unconfined aquifers are the only source of water for private wells in some rural areas. The Oak Openings region of Ohio is one such location. Wells are usually bored or driven in shallow aquifers and are more susceptible to contamination caused by human activities on the surface. To provide better protection for consumers developing shallow wells, local health departments have doubled the ...

  • Groundwater Flow in Arsenic-Contaminated Aquifer, Mekong Delta, Cambodia

    ABSTRACT To advance understanding of hydrologies I influences on As concentrations within groundwaters of Southeast Asia, the flow system of an As-rich aquifer on the Mekong Delta in Cambodia where flow patterns have not been disturbed by irrigation well pumping was examined. Monitoring of water levels in a network of installed wells, extending over a 50knr area, indicates that groundwater ...


    By In-Situ, Inc.

  • 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 ...


    By IWA Publishing

  • Transport of enterococci and F+ coliphage through the saturated zone of the beach aquifer

    Coastal groundwater has been implicated as a source of microbial pollution to recreational beaches. However, there is little work investigating the transport of fecal microbes through beach aquifers where waters of variable salinity are present. In this study, the potential for fecal indicator organisms enterococci (ENT) and F+ coliphage to be transported through marine beach aquifers was ...


    By IWA Publishing

  • Vertical disparity in electrical conductivity of groundwater: inferring water-bearing fractures in granitic aquifer

    A detailed study was conducted in hard rock terrain for delineating water-bearing fractures using electrical conductivity (EC) logs. The EC logs of groundwater were taken both in pre- and post-monsoon seasons of the year 2001; in 25 borewells in a small granitic watershed at an interval of 1 m right from the water table (though narrow spacing wherever required) till the depth to bottom of the ...


    By Inderscience Publishers

  • 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 ...


    By IWA Publishing

  • Environmental impacts of aquifer thermal energy storage investigated by field and laboratory experiments

    Aquifer thermal energy storage (ATES) uses groundwater to store energy for heating or cooling purposes in the built environment. This paper presents field and laboratory results aiming to elucidate the effects that ATES operation may have on chemical groundwater quality. Field data from an ATES site in the south of the Netherlands show that ATES results in chemical quality perturbations due to ...


    By IWA Publishing

  • Integration of an analytic element model in a stochastic analysis of infiltration into a complex unconfined aquifer system

    ABSTRACT A hydrologic model based on the Analytic Elements Method (AEM) has been developed for a phreatic aquifer in the General Separations Area (GSA), of the Savannah River Site (SRS), South Carolina, USA. The AEM is a semi-analytical method that relies on the superposition of individual closed-form solutions of elements representing the main hydrologic features of a site. Our study adopts ...


    By IWA Publishing

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