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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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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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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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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An investigation of the surface and groundwater leachate from an old waste disposal site at Mamak, Ankara, Turkey
Mamak solid waste disposal site covers an area of approximately 0.5 square kilometre and the amount of waste it holds is around 13 × 106 m?. The amount of leachate measured through a weir at the toe of the body of waste is 164,000 m3? per annum. It is calculated that approximately 130,000 m? of this amount directly comes from the waste. Owing to the retention of precipitation by wastes, it takes ...
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Subsurface iron and arsenic removal: low-cost technology for community-based water supply in Bangladesh
The principle of subsurface or in situ iron and arsenic removal is that aerated water is periodically injected into an anoxic aquifer through a tube well, displacing groundwater containing Fe(II). An oxidation zone is created around the tube well where Fe(II) is oxidised. The freshly formed iron hydroxide surfaces provide new sorption sites for soluble Fe(II) and arsenic. The system's efficiency ...
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Performance evaluation of subsurface wastewater infiltration system in treating domestic sewage
This study was to investigate domestic treatment efficiency of a subsurface wastewater infiltration (SWI) system over time. The performances of a young SWI system (in Shenyang University, China, fully operated for one year) and a mature SWI system (in Shenyang Normal University, China, fully operated for seven years) under the same operation mode were contrasted through field-scale experiments ...
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Prairie and Turfgrass buffer strips modify water infiltration and leachate resulting from impervious surface runoff
Concerns over NO3–N concentrations in drinking water and potential subsurface transport of P to surface waters are driving legislation on precautionary N and P application restrictions on turfgrass areas and in recommendations for vegetative plantings within urban environments. Two plant communities and three impervious:pervious surface ratios were examined for effects on leachate water quantity ...
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Constructed wetlands for wastewater and activated sludge treatment in north Greece: a review
Constructed wetlands used for the treatment of urban, industrial and agricultural wastewater have become very popular treatment systems all over the world. In Greece, these systems are not very common, although the climate is favourable for their use. During recent years, there have been several attempts for the implementation of these systems in Greece, which include, among others, pilot-scale ...
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Properties and Behavior of Halogenated SVOCs
An important consideration when evaluating a remedy is whether the compound is halogenated or nonhalogenated. A halogenated compound is one onto which a halogen ion(e.g., fluorine, chlorine, bromine, or iodine) has been attached. The nature of the halogen bond and the halogen itself can significantly affect performance of a technology or require more extensive treatment than for nonhalogenated ...
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Analysis of water balance and runoff generation in high latitude agricultural fields during mild and cold winters
High-latitude conditions in northern Europe are characterised by short growing seasons (May–August) and long dormant seasons. Alternating mild and freezing conditions lead to variable snow accumulation–melt cycles affecting runoff generation, and consequently the loss of nutrients and sediments from agricultural fields. We assessed water balance in two subsurface drained clayey agricultural ...
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Litter contributions to dissolved organic matter and disinfection byproduct precursors in California oak woodland watersheds
Received for publication August 31, 2008. Export of dissolved organic matter (DOM) from California oak woodland ecosystems is of a great concern because DOM is a precursor for carcinogenic disinfection byproducts (DBPs) formed during drinking water treatment. Fresh litter and decomposed duff materials for the four dominant vegetation components of California oak woodlands: blue oak (Quercus ...
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California Prepares for a Drought-Prone Future Under Stringent Title 22 Water Reuse Standards
Fluence’s first MABR plant in mainland U.S. gives California new medium- and small-scale treatment options that comply with the state’s stringent standards for water reuse Water recycling, which sometimes is referred to by the unfortunate description “toilet-to-tap,” is becoming more and more important in a world facing increasing water scarcity. But the United States ...
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Properties and Behavior of Halogenated VOCs
An important consideration when evaluating a remedy is whether the compound is halogenated or nonhalogenated. A halogenated compound is one onto which a halogen (e.g., fluorine, chlorine, bromine, or iodine) has been attached. The nature of the halogen bond and the halogen itself can significantly affect performance of a technology or require more extensive treatment than for nonhalogenated ...
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Water penetration problems
Water penetration problems effect one out of every five acres in California (about 20 percent of the farm land) and it’s estimated that this costs growers $20 to $1,200 per acre. This problem is definitely worth taking a close look at since its quiet common in the central San Joaquin Valley. A more appropriate term to describe water entering the soil at the surface is infiltration. ...
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Reducing agriculture’s water footprint
Decentralized Water Reuse Can Help Preserve Sources of Fresh Water As the world population grows, so does the demand for food and the need to grow more crops. In many regions of the world, water has become a scarce resource, with supplies affected by climatic changes. Not only does water scarcity limit farmers’ ability to irrigate their crops, but overdrawing groundwater supplies for ...
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Produced-water Recycling and Energy Reduction for Central Oklahoma
Enhanced oil and gas recovery (fracturing) techniques and water go hand in hand. Current pressures including limited fresh water sources, transportation, fracturing volume requirements, and disposal costs and restrictions are driving the development of new water management strategies. Recycling and managed biologic treatment of surface water is proving to be a cost-effective, more environmentally ...
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Halogenated Volatile Organic Compounds
Sites where halogenated VOCs may be found include burn pits, chemical manufacturing plants or disposal areas, contaminated marine sediments, disposal wells and leach fields, electroplating/metal finishing shops, firefighting training areas, hangars/aircraft maintenance areas, landfills and burial pits, leaking collection and system sanitary lines, leaking storage tanks, radioactive/mixed waste ...
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Home, Sweet Wastewater Building
How can a wastewater treatment plant embedded into a neighborhood not use much landmass and be environmentally friendly and user-friendly all at the same time? One system aims to do all of the above. Why should a wastewater treatment plant always have to look like, well, a wastewater treatment plant? A visual trip through project files of Aqueonics Inc., based in Greenville, SC, reveals photos ...
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