subsurface water Articles
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Nitrogen patterns in subsurface waters of the Yzeron stream: effect of combined sewer overflows and subsurface–surface water mixing
Urbanization subjects streams to increased nitrogen loads. Therefore studying nitrogen forms at the interface between urban stream and groundwater is important for water resource management. In this study we report results on water δ18O and nitrogen forms in subsurface waters of a stream (Yzeron, France). The sites studied were located upstream and downstream of combined sewer overflows ...
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Extraterrestrial hydrogeology
Subsurface water processes are common for planetary bodies in the solar system and are highly probable for exoplanets (planets outside the solar system). For many solar system objects, the subsurface water exists as ice. For Earth and Mars, subsurface saturated zones have occurred throughout their planetary histories. Earth is mostly clement with the recharge of most groundwater reservoirs from ...
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Computational benefits using artificial intelligent methodologies for the solution of an environmental design problem: saltwater intrusion
Artificial Neural Networks (ANNs) comprise a powerful tool to approximate the complicated behavior and response of physical systems allowing considerable reduction in computation time during time-consuming optimization runs. In this work, a Radial Basis Function Artificial Neural Network (RBFN) is combined with a Differential Evolution (DE) algorithm to solve a water resources management problem, ...
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Traditional water rights, ecology and the public trust doctrine in Hawaii
This case study discusses the implications of imposing the doctrine of public trust to ground and surface waters within the State of Hawaii and its effects on traditional rights that had previously evolved based on common law. It traces the major events of the history of water rights and practices beginning with the system devised by the indigenous Hawaiian people prior to the adoption of the ...
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Sustainability of societal water management practices
For sustainable water management in water scarce areas available quantity of water is consumptively used and saved water is conjunctively supplied in addition to insufficient quantity available in water deficit months. Such storages are generated season wise and selecting suitable technique of aquifer storage as against preservation in a surface water body is a vital issue. Conjunctive planning ...
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Virus removal vs. subsurface water velocity during slow sand filtration
In an attempt to obtain a conservative estimate of virus removal during slow sand and river bank filtration, a somatic phage was isolated with slow decay and poor adsorption to coarse sand. We continuously fed a phage suspension to a 7-m infiltration path and measured the phage removal. In a second set of experiments, we fed the phage suspension to 1-m long columns run at different pore water ...
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Adsorption of As, B, Cr, Mo and Se from coal fly ash leachate by Fe3+ modified bentonite clay
Fly ash contains the potentially toxic elements As, B, Cr, Mo and Se which upon contact with water may be leached to contaminate surface and subsurface water bodies. This study aims to evaluate the adsorption of these elements from coal fly ash leachates on Fe3+-modified bentonite (Fe-Bent); such modification improved the physicochemical properties of bentonite clay. For optimization of ...
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Wellboom - For groundwater well management and site remediation
UniRemTech's WELLBOOM® was designed to facilitate testing on Underground Storage Tank (UST) monitoring wells and is easier and less costly than traditional pre-test methods at keeping the well clean and test-ready. WELLBOOM® can also substantially reduce the remediation time for leaking USTs and other contaminated sites, resulting in faster handover and startup of these valuable assets. ...
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UW Researchers Reveal Secrets of Subsurface Water Storage
Overview In recent years, an intrepid team of University of Wyoming researchers conducted a multi-site project to explore subsurface hydrology in and around the Laramie Range and expand our understanding of this critical water source for the western U.S. Challenge In the semi-arid western United States, every drop of water counts, especially as a growing population and climate change stress ...
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Biodegradation of artificial monolayers applied to water storages to reduce evaporative loss
Repeat applications of an artificial monolayer to the interfacial boundary layer of large agricultural water storages during periods of high evaporative demand remains the most commercially feasible water conservation strategy. However, the interfacial boundary layer (or microlayer) is ecologically distinct from subsurface water, and repeat monolayer applications may adversely affect ...
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Project - SUBSOL - SUBsurface water SOLutions to the market
The goal of this project was to pump and treat polluted groundwater, re-supplying clean water to a nearby wetland and recharging the groundwater layers of a nearby coastal aquifer, in order to prevent saltwater intrusion (Central Greece). During this project Greener than Green Technologies: designed and implement the necessary Subsurface Water Solutions (SWS), in order to pump and treat ...
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Subsurface trickle irrigation system for on–site wastewater disposal and reuse
Summary of Process Description The subsurface trickle irrigation system described in this report utilizes an aerobic treatment system in conjunction with a proven subsurface water application system developed by GEOFLOW, Inc. to offer a total system concept for safe and effective sewage disposal for site conditions considered marginal or unsuitable for conventional septic tank systems. The ...
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Soil moisture and metolachlor volatilization observations over three years
Received for publication June 18, 2008. A 3-yr study was conducted to focus on the impact of surface soil water content on metolachlor (2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl) acetamide) volatilization from a field with different surface soil water regimes created by subsurface water flow paths. Metolachlor vapor fluxes were measured at two locations within the field where ...
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Soil moisture and metolachlor volatilization observations over three years
Received for publication June 18, 2008. A 3-yr study was conducted to focus on the impact of surface soil water content on metolachlor (2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl) acetamide) volatilization from a field with different surface soil water regimes created by subsurface water flow paths. Metolachlor vapor fluxes were measured at two locations within the field where ...
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Impact of artificial monolayer application on stored water quality at the air–water interface
Evaporation mitigation has the potential to significantly improve water use efficiency, with repeat applications of artificial monolayer formulations the most cost-effective strategy for large water storages. Field investigations of the impact of artificial monolayers on water quality have been limited by wind and wave turbulence, and beaching. Two suspended covers differing in permeability ...
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Impact of artificial monolayer application on stored water quality at the air–water interface
Evaporation mitigation has the potential to significantly improve water use efficiency, with repeat applications of artificial monolayer formulations the most cost-effective strategy for large water storages. Field investigations of the impact of artificial monolayers on water quality have been limited by wind and wave turbulence, and beaching. Two suspended covers differing in permeability ...
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Case study: RMOTC - Using existing wells, hydro-geologic barriers are mapped.
In August of 2005, Willowstick Technologies, LLC performed an AquaTrack study at the Teapot Dome oil field near Casper, Wyoming. The project was performed together with the assistance of the Rocky Mountain Oilfield Testing Center (RMOTC), a unit of the United States Department of Energy. The purpose of the project was to demonstrate how the AquaTrack technology can be applied to subsurface oil ...
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Bottling water, greening farmers: the socio-technical and managerial construction of a 'dispositif' for underground water quality protection
This paper proposes the description and analysis of the dynamics of an innovation process, which, over ten years ago, enabled a mineral water company to start protecting its underground water and to overcome a classical negative externality problem of no point-source nitrogen pollution. Based on methodological reflection and discussion of the dynamics of socio-technical arrangement in the ...
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Assessment of water quality in Little Vermillion River watershed using principal component and nearest neighbor analyses
Because of increased use of fertilizers to feed the increasing global population, the nutrient loads in surface and subsurface water have increased substantially in the last few decades. Many studies have been conducted to investigate the factors affecting nitrate load in surface and subsurface flow. The objective of this study is to investigate the relationship between the various factors ...
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Texas Earthen Dam Seepage Flow Path Study - Case Study
Willowstick characterizes seepage flow paths through through the dam Background An engineering company was set to build a new outlet structure for a reservoir. They had been monitoring the dam for seepage and wanted to gain a better understanding of where seepage was occurring. Of significant importance to the client was the desire to characterize any preferential seepage flow paths along the ...
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