groundwater conductivity Articles
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Hydro-geochemical characteristics of groundwater of Sirhind Nala sub-basin (Ghaggar river basin, India) in relation to salinity hazard
Hydro-geochemical investigation of groundwater of Sirhind Nala sub-basin of the Ghaggar river basin (Southwest Punjab) has been carried out to study the distribution and sources of various dissolved ions. The levels of EC indicated that high salinity of groundwater was confined to small patches. The variations in EC levels seem to be related to non-flushing of water entrapped by clay beds, ...
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Trends and transformation of nutrients and pesticides in a coastal plain aquifer system, United States
Received for publication March 19, 2009. Four local-scale sites in areas with similar corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] agriculture were studied to determine the effects of different hydrogeologic settings of the Northern Atlantic Coastal Plain (NACP) on the transport of nutrients and pesticides in groundwater. Settings ranged from predominantly well-drained soils overlying ...
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Sources of Nitrate in Snowmelt Discharge: Evidence From Water Chemistry and Stable Isotopes of Nitrate
To determine whether NO3−, concentration pulses in surface water in early spring snowmelt discharge are due to atmospheric NO3−,, we analyzed stream δ,15N-NO3−, and δ,18O-NO3−, values between February and June of 2001 and 2002 and compared them to those of throughfall, bulk precipitation, snow, and groundwater. Stream total Al, DOC and Si concentrations were used ...
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Evaluation of Ceraflow-50 as a Filtration Media for Hexavalent Chromium Treatment - Case Study
Project Description Pilot testing was conducted to evaluate the relative performance of 4 filter media, including Ceraflow-50, as part of a reduction coagulation filtration (RCF) treatment process for the removal of hexavalent chromium (Cr(VI)) from groundwater. This evaluation was conducted at multiple well sites for a water utility in California. The RCF process achieves Cr(VI) removal by ...
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Department of Groundwater Resources - Thailand - Case Study
A long time customer of Tecta-PDS, they now have x15 Tecta-B16 instruments installed. The units are used for remote monitoring of groundwater resources around Thailand, compared to previously taking samples from around the country and sending them to the main cities for analysis. The Groundwater Analysis Division at the Department of Groundwater Resources for Thailand has quite a mandate! ...
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White paper on Willowstick technology used for mapping and modeling groundwater systems
1.0 Introduction Willowstick Technology (the “Technology”) delineates and characterizes subsurface aqueous systems in complex hydrogeologic settings. It has consistently proven valuable in: 1) the diagnosis of seepage through earthen dams and levees; 2) characterizing groundwater infiltration into surface and subsurface mines; 3) tracking pollution plumes influenced by groundwater ...
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Former Wellsite Sump - In-Situ Chemical Oxidation - Case Study
Former admixed drilling sump at an abandoned wellsite. Surficial soil impacts were excavated and removed from Site. Shallow groundwater limited excavation and required in-situ treatment method for remaining soil impacts and groundwater impacts. Lithology of the target treatment zone is saturated silty sand, creating a pathway for contaminant ...
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Several natural indicators of radial well ageing at the Belgrade Groundwater Source, part 2
From 2005 to 2009, research was conducted at the Belgrade Groundwater Source (BGWS) to investigate the process of clogging of wells with horizontal lateral screens (radial wells). The clogging process was monitored via the kinetics of the increase in hydraulic losses at the laterals. A correlation of this process with the redox potential, the iron concentration in water, and the microbial ...
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Hydrochemical and multivariate analysis of groundwater quality in the northwest of Sinai, Egypt
The northwestern coast of Sinai is home to many economic activities and development programs, thus evaluation of the potentiality and vulnerability of water resources is important. The present work has been conducted on the groundwater resources of this area for describing the major features of groundwater quality and the principal factors that control salinity evolution. The major ionic ...
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Identification of groundwater potential zone of Nawada district, Bihar (India) – a study based on remote sensing and GIS platform
A study was conducted to delineate the groundwater potential zones of Nawada district of Southern Bihar using satellite-derived information layers, namely, elevation, slope, drainage density, land use, fractional impervious surface (FIS) and also using existing thematic maps (lithology, soil, pre- and post-monsoon water level) based on the weighted linear combination method. On the basis of the ...
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Groundwater quality assessment and its suitability for agricultural purposes in the Behbahan Plain, SW Iran
Groundwater is the main agricultural water resource in arid and semi-arid regions, so, preserving it is extremely important. In this study, groundwater quality was assessed for irrigation, using the principal chemical and physical quality parameters from 30 wells in the study area. Groundwater classification on the basis of electrical conductivity reveals that more than 85% of the samples taken ...
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Edible Oil Barriers for Treatment of Perchlorate Contaminated Groundwater
An EOS® biobarrier was designed and implemented to remediate perchlorate contaminated groundwater. The report describes the site characterization, design steps, implementation, monitoring results and lessons learned from this effective remedial approach. EXECUTIVE SUMMARYThis final technical report documents the demonstration of emulsified edible oils for remediation of perchlorate in ...
By Redox Tech
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Fractured Bedrock Remediation - Case Study
ABSTRACT BOS 200® successfully remediates petroleum groundwater impacts in fractured bedrock at a former truck stop. Based on the post-injection groundwater results from the pilot test and full-scale injection, a No Further Action letter was issued in February 2015. CHALLENGES Over a period of 20 years, site investigation activities revealed a 320 foot (ft) long dissolved hydrocarbon plume ...
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Enhanced Anaerobic Bioremediation of a TCE Source at the Tarheel Army Missile Plant Using EOS
EOS, or emulsified oil substrate, was used to stimulate anaerobic biodegradation of trichloroethene (TCE) and tetrachloroethene (PCE) at a former Army-owned manufacturing facility located in the Piedmont area of North Carolina. Previous use of chlorinated solvents at the facility resulted in soil and groundwater impacts. Ten years of active remediation utilizing soil vacuum extraction and air ...
By Redox Tech
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Hydraulic and Thermal Response of Groundwater–Surface Water Exchange to Flooding in Experimental Aquifer
Summary The effects of flooding on interactions between streams and shallow aquifers are poorly studied due to the unpredictable nature of flooding events. This study examines groundwater-surface water interactions in a constructed experimental meander over several simulated flood events using hydrologic and thermal monitoring. Detailed steady-state hydraulic head measurements were taken of the ...
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