aquifer nitrate Articles
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Soils Characteristics of The Bassendean and Spearwood Sands of the Gnangara Mound (Western Australia) and their Controls On Recharge, Water Level Patterns and Solutes of The Superficial Aquifer
The flow pathways of water in the soils of the Gnangara Mound are highly irregular and depend upon the moisture content, the repellency and preferential wettability potential of the soils. The occurrence of preferential flow is more evident in dry soils. As the soil wets during the rainy season, the water repellence and differential wettability decreases, the fingering and the preferential flow ...
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Soils Characteristics of The Bassendean and Spearwood Sands of the Gnangara Mound (Western Australia) and their Controls On Recharge, Water Level Patterns and Solutes of The Superficial Aquifer
The flow pathways of water in the soils of the Gnangara Mound are highly irregular and depend upon the moisture content, the repellency and preferential wettability potential of the soils. The occurrence of preferential flow is more evident in dry soils. As the soil wets during the rainy season, the water repellence and differential wettability decreases, the fingering and the preferential flow ...
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Study the impact of land use and over pumping on nitrate concentration in groundwater by using modelling approach
Gaza Strip, a heavily populated area, is a narrow coastal strip on the Mediterranean Sea (360 km 2 ). Groundwater is the only source of drinking water for the majority of the population. However, many human activities greatly threaten the groundwater resources and nitrate was and still is a major groundwater pollutant. Khanyounis, one of the southern governorates of Gaza Strip, is suffering ...
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Nitrate Accumulation and Other Components of the Groundwater in Relation to Cropping System in an Aquifer in Southwestern Spain
Inappropriate farming techniques and 4 years of drought (1992–1995) produced conditions for high nitrate concentration in an aquifer located in the Province of Seville (Southwest Spain). The objectives of this study were to study groundwater components and to determine the relationship between the cropping system and nitrate concentrations in groundwater. From October 1994 to May 1996, 16 ...
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Nitrate Pollution Affects Millions in U.S.
According to new study, the water contamination disproportionately affects poor and Hispanic Americans Runoff of agricultural fertilizer is a major source of nitrate pollution in drinking water. A new study in the journal Environmental Justice has determined that 5.6 million Americans served by community water systems (CWSs) in the United States are exposed to excessive nitrate levels in ...
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Evaluation of an intrinsic and a specific vulnerability assessment method in comparison with groundwater salinisation and nitrate contamination levels in two agricultural regions in the south of Portugal
The applicability of two vulnerability assessment methods in evaluating the impact of agricultural activities on groundwater quality, is tested in two areas in the south of Portugal with modest results. Intensive citri- and horticulture require large amounts of fertiliser and water supplied by irrigation, which induces groundwater salinisation and contamination by nitrates. The degree of ...
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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 ...
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Denitrification during vertical upwelling at an alluvium–diluvium interface below the upland perimeter of a Riparian paddy
Received for publication May 4, 2008. Denitrification hotspots in riparian aquifers often develop in a relatively narrow zone at the upland–riparian interface, where nitrate-rich ground water of upland origin interacts with available soil organic carbon. In riparian paddy fields, denitrification in the aquifer has received less attention than that in the surface water and soil. This study aimed ...
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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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U.S. Groundwater Reserves More Limited Than Assumed
In many parts of the U.S., farmers rely on groundwater to irrigate their fields. It’s long been assumed that there was a reliable supply of fresh water in deep “fossil aquifers,” but researchers are finding that these often contain brackish water not suitable for irrigation. Deep ‘fossil aquifers’ are more likely than expected to be brackish or contaminated As ...
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