U.S. Geological Survey artificial recharge workshop proceedings, April 2-4, 2002, Sacramento, California

Aiken, George R.; Kuniansky, Eve L.

doi:10.3133/ofr0289

Cited by 17 publications

(8 citation statements)

References 88 publications

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“…Peaks at longer wavelengths during the wet season are explained by the occurrence of increased river discharge that delivers CDOM of terrestrial origin to the shelf. This material has been shown to be red‐shifted, highly colored, labile and compositionally complex [ McKnight et al , 2001; Aiken , 2002; Stedmon and Markager , 2005] as compared to marine organics. Conversely, the occurrence of peaks at shorter wavelengths during the wet season is the result of warmer temperatures and high sun exposure of these summer months.…”

Section: Resultsmentioning

confidence: 99%

Influence of extreme storm events on West Florida Shelf CDOM distributions

et al. 2009

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Colored Dissolved Organic Matter (CDOM) distribution and signatures provide vital information about the amount and composition of organic material in aquatic environments. This information is critical for deciphering the sources and biogeochemical pathways of organic carbon, and thus vital to the understanding of carbon cycling and budgets. Waters of the West Florida Shelf are heavily influenced by many river systems on Florida's Gulf Coast that, to the first order, control CDOM distributions on the shelf. Three storm events during 2004 and 2005 (Hurricane Charley, Hurricane Wilma, and a Winter Storm) profoundly altered the typical distribution of CDOM fluorescence and absorption properties on the Southern West Florida Shelf. Seasonal surveys revealed that changes in the underwater light field as a result of major hurricanes and resuspension events are linked closely with a number of factors prior to a storm's passing such as the presence of persistent blooms, rainfall and discharge. Additionally, storm track and wind direction were found to play a significant role in CDOM signatures.

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Section: Resultsmentioning

confidence: 99%

Influence of extreme storm events on West Florida Shelf CDOM distributions

et al. 2009

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“…Reclaimed water, also known as recycled water, is wastewater or stormwater that has been treated to an appropriate level so that the water can be reused (U.S. Environmental Protection Agency, 2004). Reclaimed water is being used throughout the world for many purposes, including agricultural and golf-course irrigation, cooling of industrial equipment, and recharging aquifers (O'Reilly, 1998;Aiken and Kuniansky, 2002;U.S. Geological Survey, 2009c).…”

Section: Explanationmentioning

confidence: 99%

Simulation of Reclaimed-Water Injection and Pumping Scenarios and Particle-Tracking Analysis near Mount Pleasant, South Carolina

Petkewich¹,

Campbell²

2009

Scientific Investigations Report

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The effect of injecting reclaimed water into the Middendorf aquifer beneath Mount Pleasant, South Carolina, was simulated using a groundwater-flow model of the Coastal Plain Physiographic Province of South Carolina and parts of Georgia and North Carolina. Reclaimed water, also known as recycled water, is wastewater or stormwater that has been treated to an appropriate level so that the water can be reused. The scenarios were simulated to evaluate potential changes in groundwater flow and groundwater-level conditions caused by injecting reclaimed water into the Middendorf aquifer. Simulations included a Base Case and two injection scenarios. Maximum pumping rates were simulated as 6.65, 8.50, and 10.5 million gallons per day for the Base Case, Scenario 1, and Scenario 2, respectively. The Base Case simulation represents a non-injection estimate of the year 2050 groundwater levels for comparison purposes for the two injection scenarios. For Scenarios 1 and 2, the simulated injection of reclaimed water at 3 million gallons per day begins in 2012 and continues through 2050. The flow paths and time of travel for the injected reclaimed water were simulated using particletracking analysis. The simulations indicated a general decline of groundwater altitudes in the Middendorf aquifer in the Mount Pleasant, South Carolina, area between 2004 and 2050 for the Base Case and two injection scenarios. For the Base Case, groundwater altitudes generally declined about 90 feet from the 2004 groundwater levels. For Scenarios 1 and 2, although groundwater altitudes initially increased in the Mount Pleasant area because of the simulated injection, these higher groundwater levels declined as Mount Pleasant Waterworks pumping increased over time. When compared to the Base Case simulation, 2050 groundwater altitudes for Scenario 1 are between 15 feet lower to 23 feet higher for production wells, between 41 and 77 feet higher for the injection wells, and between 9 and 23 feet higher for observation wells in the Mount Pleasant area. When compared to the Base Case simulation, 2050 groundwater altitudes for Scenario 2 are between 2 and 106 feet lower for production wells and observation wells and between 11 and 27 feet higher for the injection wells in the Mount Pleasant area. Water budgets for the model area immediately surrounding the Mount Pleasant area were calculated for 2011 and for 2050. The largest flow component for the 2050 water budget in the Mount Pleasant area is discharge through wells at rates between 7.1 and 10.9 million gallons of water per day. This groundwater is replaced predominantly by between 6.0 and 7.8 million gallons per day of lateral groundwater flow within the Middendorf aquifer for the Base Case and two scenarios and through reclaimed-water injection of 3 million gallons per day for Scenarios 1 and 2. In addition, between 175,000 and 319,000 gallons of groundwater are removed from this area per day because of the regional hydraulic gradient. Additional sources of water to this area are groundwater storage relea...

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“…Miller et al (1981) attributed saline seep development in the northern Great Plains to fallow periods in dryland agriculture, flushing salts from marine sediments in the unsaturated zone. Studies have shown that artificial recharge in southern California (US) can mobilize naturally occurring arsenic, chromium, and other salts impairing groundwater quality (Aiken & Kuniansky, 2002). Sustainable resource management planning requires considering the impacts of LU/LC changes on both the quantity and quality of groundwater.…”

Section: Introductionmentioning

confidence: 99%

Impact of land use and land cover change on groundwater recharge and quality in the southwestern US

Scanlon

Reedy

Stonestrom

et al. 2005

Global Change Biology

585

341

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Humans have exerted large-scale changes on the terrestrial biosphere, primarily through agriculture; however, the impacts of such changes on the hydrologic cycle are poorly understood. The purpose of this study was to test the hypothesis that the conversion of natural rangeland ecosystems to agricultural ecosystems impacts the subsurface portion of the hydrologic cycle by changing groundwater recharge and flushing salts to underlying aquifers. The hypothesis was examined through point and areal studies investigating the effects of land use/land cover (LU/LC) changes on groundwater recharge and solute transport in the Amargosa Desert (AD) in Nevada and in the High Plains (HP) in Texas, US. Studies use the fact that matric (pore-water-pressure) potential and environmental-tracer profiles in thick unsaturated zones archive past changes in recharging fluxes. Results show that recharge is related to LU/LC as follows: discharge through evapotranspiration (i.e., no recharge; upward fluxes o0.1 mm yr À1 ) in natural rangeland ecosystems (low matric potentials; high chloride and nitrate concentrations); moderate-to-high recharge in irrigated agricultural ecosystems (high matric potentials; lowto-moderate chloride and nitrate concentrations) (AD recharge: $ 130-640 mm yr À1 ); and moderate recharge in nonirrigated (dryland) agricultural ecosystems (high matric potentials; low chloride and nitrate concentrations, and increasing groundwater levels) (HP recharge: $ 9-32 mm yr À1 ). Replacement of rangeland with agriculture changed flow directions from upward (discharge) to downward (recharge). Recent replacement of rangeland with irrigated ecosystems was documented through downward displacement of chloride and nitrate fronts. Thick unsaturated zones contain a reservoir of salts that are readily mobilized under increased recharge related to LU/LC changes, potentially degrading groundwater quality. Sustainable land use requires quantitative knowledge of the linkages between ecosystem change, recharge, and groundwater quality.

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U.S. Geological Survey artificial recharge workshop proceedings, April 2-4, 2002, Sacramento, California

Abstract: Using chemical and isotopic tracers to assess hydrogeologic processes and properties in aquifers intended for injection and recovery of imported water by John Izbicki

Cited by 17 publications

References 88 publications

Influence of extreme storm events on West Florida Shelf CDOM distributions

Influence of extreme storm events on West Florida Shelf CDOM distributions

Simulation of Reclaimed-Water Injection and Pumping Scenarios and Particle-Tracking Analysis near Mount Pleasant, South Carolina

Impact of land use and land cover change on groundwater recharge and quality in the southwestern US

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