Groundwater Flow Direction Articles & Analysis
26 articles found
Introduction: Why Chloride Plumes Behave Differently Chloride contamination presents a unique challenge in groundwater systems. Unlike many organic contaminants, chloride does not degrade, volatilize, or readily bind to soil. Once introduced into the subsurface, it moves with groundwater, often persisting for decades. ...
ByLiORA
The Well Redundancy Problem Every groundwater monitoring network includes wells that cost money but provide no commensurate value. This statement reflects reality at contaminated sites worldwide, not a criticism of the hydrogeologists who designed these networks. Contamination plumes evolve over time, and our understanding of subsurface conditions improves as data accumulates. A well that ...
ByLiORA
The Global Contamination Challenge Over 2 million contaminated sites exist globally, and we continue polluting more sites than we clean up. This disparity between the problems we face and our ability to solve them through innovation creates what I call an ingenuity gap. The gap persists not because solutions do not exist, but because industry practices lag behind scientific advances by decades. ...
ByLiORA
Investigation of an industrial dry cleaners near Philadelphia, Pennsylvania found concentrations of breakdown products of PCE in the soil and ground water. The parent PCE presumably was reductively dechlorinated to TCE, DCE and vinyl chloride. However, since the daughter products DCE and vinyl chloride are more readily degraded under aerobic conditions, the breakdown was incomplete and natural ...
If such geomembrane leaks, the contaminant from landfill is spreading in direction of the groundwater flow. This way it can reach long distance and contaminate the environment for a long time. ...
Installation of the vertical system began in 2007 and the system operated from 2008 through 2011, and successfully treated the on-site contamination beneath the facility. Site map depicting overall groundwater flow direction. Remedial Challenges Over the decades, groundwater flow toward the south transferred ...
Geophysical and physicochemical methods were carried out to examine the effect of leachate on groundwater in a dumpsite location in Akwa Ibom State, Nigeria. This was done to ascertain the level of organic contamination in the wells located in the study area. ...
The aim of this study was to evaluate the quality and hydrochemical characteristics of urban groundwater in Urmia City, northwest of Iran. In order, 59 groundwater samples were collected and analyzed for various anions and cations. Result shows that, mineral weathering, ion exchange and anthropogenic activity are the main hydrochemical processes controlling ...
There are four large wells there, each with three underwater pumps that lift the groundwater. The advantage of the groundwater is that it has already been filtered by sand and gravel layers in the soil, and no additional cleaning is needed. But this is only true for the groundwater flow from the direction of the ...
This study evaluates the effects of surrounding groundwater flow on seepage direction and assesses factors that affect seepage flux in a closed-basin lake in northeastern Estonia – Lake Martiska. A piezometric map was used to determine directions of groundwater flow around the lake. ...
Because the (aquifer thermal energy storage system is located close to the groundwater divide, the energy recovery is less sensitive to the well configuration with respect to the groundwater flow direction. ...
Some parts of the subsurface are also contaminated by high concentrations of iron and other inorganics (mainly chlorides and sulphates) which have increased the salinity of the groundwater. A number of groundwater monitoring campaigns has been undertaken followed by a preliminary site investigation. ...
The Sandspruit catchment (a tributary of the Berg River) represents a drainage system, whereby saline groundwater with total dissolved solids (TDS) up to 10,870 mg/l, and electrical conductivity (EC) up to 2,140 mS/m has been documented. ...
AquaTrack works by measuring magnetic fields generated by an AC current, which is applied using strategically placed electrodes that are in direct contact with groundwater flow. After multiple unobtrusive readings taken by a Willowstick surveyor, the data is applied to mathematical algorithms and used to create maps and three-dimensional models ...
In addition to the stream boundary, flow within the meander is also controlled by loss of stream water to the subsurface, which directs hydraulic gradients towards the base of the meander. Finally, the temperature distribution within the meander during normal and bankfull flow mimics the water table distribution and results from advected warm ...
Tidal effects have the potential to measurably affect water level measurements and the estimation of groundwater flow direction and gradient. This has significant implications for the prediction and monitoring of contaminant plumes in coastal areas. ...
The Las Flores basin is one of four groundwater basins that supply drinking water to Camp Pendleton. Groundwater in the Las Flores basin is extracted from the alluvial aquifer and the San Mateo aquifer located in the coastal basin. The San Mateo aquifer is overlain by unconsolidated alluvial deposits and underlain by the San Onofre Breccia. ...
LOCATION: Dover, DelawarePROJECT DATE: October 1999 to presentCLIENT: Air Force Center for Environmental Excellence (AFCEE) BACKGROUND: Groundwater contaminated with chlorinated solvents is a common problem to many US Air Force Bases. ...
One of the major concerns most commonly found in coastal aquifers, is the induced flow of salt water into fresh water aquifers caused by groundwater development, known as salt water intrusion. ...
Perth groundwater resources are obtained from three major aquifers that occur beneath the Perth metropolitan area: the Superficial aquifer, Leederville aquifer and Yarragadee aquifer. ...