Factors affecting occurrence and distribution of selected contaminants in ground water from selected areas in the Piedmont Aquifer System, Eastern United States, 1993-2003

Lindsey, Bruce D.; Falls, W. Fred; Ferrari, Matthew J.; Zimmerman, Tammy M.; Harned, Douglas A.; Sadorf, Eric M.; Chapman, Melinda J.

doi:10.3133/sir20065104

Cited by 14 publications

(17 citation statements)

References 16 publications

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“…Topography is important for groundwater quality because it affects the time taken and distance traveled by groundwater as it moves from the land surface through the aquifer, ultimately to discharge to streams. (8) The climate of the region is humid and temperate, with average annual precipitation in the range of 40 to 60 inches. Precipitation is greater at higher elevations, and the temperatures are much warmer in the south than in the north.…”

Section: Environmental Settingmentioning

confidence: 99%

“…Recharge to the aquifers is highest in areas with the greatest precipitation and lowest temperatures. (8) …”

Section: Environmental Settingmentioning

confidence: 99%

“…In wells where groundwater ages were determined, about half of the ages were less than 20 years, and the other half of the ages were between 20 and 60 years (see chapter 4). Areas in North Carolina known as the Durham-Sanford basins are siliciclastic-rock aquifers (8) that do not appear on figure 2-1, but these areas were not sampled as a part of the early Mesozoic basin aquifers.…”

Section: Early Mesozoic Basin Aquifersmentioning

confidence: 99%

“…Higher concentrations of dieldrin, a pesticide that was used in urban areas and is now banned, were detected in areas with a larger percentage of urban land surrounding a well. (8,22) Simazine, prometon, and tebuthiuron are general-use herbicides that have both agricultural and urban uses-these pesticides were detected most frequently in samples from urban areas in the carbonate-rock aquifers. Pesticides with highest use-atrazine and metolachlor-were among the most frequently detected pesticides in domestic and public-supply wells ( fig.…”

Section: Bedrock Type and Land Use Affect The Occurrence And Distribumentioning

confidence: 99%

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The quality of our nation's waters: water quality in the Principal Aquifers of the Piedmont, Blue Ridge, and Valley and Ridge regions, eastern United States, 1993-2009

Lindsey¹,

Zimmerman²,

Chapman³

et al. 2015

Circular

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For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit http://www.usgs.gov or call 1-888-ASK-USGS. For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprodTo order this and other USGS information products, visit http://store.usgs.gov Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. ForewordThe United States has made major investments in assessing, managing, regulating, and conserving natural resources, such as water and a variety of ecosystems. Sustaining the quality of the Nation's water resources and the health of our diverse ecosystems depends on the availability of sound water-resources data and information to develop effective, science-based policies. Effective management of water resources also brings more certainty and efficiency to important economic sectors. Taken together, these actions lead to immediate and long-term economic, social, and environmental benefits that make a difference to the lives of millions of people (http://water.usgs.gov/nawqa/applications/).Two decades ago, Congress established the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program to meet this need. Since then NAWQA has served as a primary source of nationally consistent information on the quality of the Nation's streams and groundwater, on ways in which water quality changes over time, and on the natural features and human activities affecting the quality of streams and groundwater. Objective and reliable data, systematic scientific studies, and models are used to characterize where, when, and why the Nation's water quality is degraded-and what can be done to improve and protect the water for human and ecosystem needs. This information is critical to our future because the Nation faces an increasingly complex and growing need for clean water to support people, economic growth, and healthy ecosystems. For example, NAWQA findings for public-supply wells, which provide water to about 105 million people, showed that 22 percent of source-water samples contained at least one contaminant at levels of potential health concern. Similarly, 23 percent of samples from domestic (or privately owned) wells, which supply untreated water to an additional 43 million people, also had contaminant levels of potential concern.This report is one of a collection of publications that describe water-quality conditions in selected Principal Aquifers of the United States (http://water.usgs.gov/nawqa/studies/praq/). The collection is part of the series "The Quality of Our Nation's Waters," which describes major findings of the NAWQA Program on water-quality issues of...

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Section: Environmental Settingmentioning

confidence: 99%

“…Recharge to the aquifers is highest in areas with the greatest precipitation and lowest temperatures. (8) …”

Section: Environmental Settingmentioning

confidence: 99%

Section: Early Mesozoic Basin Aquifersmentioning

confidence: 99%

Section: Bedrock Type and Land Use Affect The Occurrence And Distribumentioning

confidence: 99%

See 2 more Smart Citations

The quality of our nation's waters: water quality in the Principal Aquifers of the Piedmont, Blue Ridge, and Valley and Ridge regions, eastern United States, 1993-2009

Lindsey¹,

Zimmerman²,

Chapman³

et al. 2015

Circular

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“…The rocks are covered almost everywhere by regolith, and most of groundwater is stored in the shallow, porous regolith (Lindsey et al, 2006). Since unconfined groundwater generally occurs both in the porous and shallow regolith (Heath, 1984), it is assumed that groundwater is stored in unconfined aquifer across the entire watershed.…”

mentioning

confidence: 99%

Assessing the resiliency of surface water and groundwater systems under groundwater pumping

Seo

Mahinthakumar

Sankarasubramanian

et al. 2017

Preprint

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Abstract:Since surface water and groundwater systems are fully coupled and integrated systems, increased groundwater withdrawal during drought may reduce groundwater discharges into the stream, thereby prolonging both systems' recovery from drought. To analyze watershed response to basin-level groundwater pumping, we propose an uncertainty framework to understand the 5 resiliency of groundwater and surface water systems using a fully-coupled hydrologic model under transient pumping. The proposed framework incorporates uncertainties in initial conditions to develop robust estimates of restoration times of both surface water and groundwater systems and quantifies how pumping impacts state variables such as soil moisture. Groundwater pumping impacts over a watershed were also analyzed under different pumping volumes and different 10 potential climate scenarios. Our analyses show that groundwater restoration time is more sensitive to variability in climate forcings as opposed to changes in pumping volumes. After the cessation of pumping, streamflow recovers quickly in comparison to groundwater, which has higher persistence. Pumping impacts on various hydrologic variables were also discussed. Given that surface water and groundwater are inter-connected, optimal management of the both 15 resources should be considered to improve the watershed resiliency under drought. Potential for developing optimal conjunctive management plans using seasonal-to-interannual climate forecasts is also discussed.Hydrol. Earth Syst. Sci. Discuss., https://doi

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Assessing the restoration time of surface water and groundwater systems under groundwater pumping

Seo

Mahinthakumar

Sankarasubramanian

et al. 2018

Stoch Environ Res Risk Assess

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Factors affecting occurrence and distribution of selected contaminants in ground water from selected areas in the Piedmont Aquifer System, Eastern United States, 1993-2003

Cited by 14 publications

References 16 publications

The quality of our nation's waters: water quality in the Principal Aquifers of the Piedmont, Blue Ridge, and Valley and Ridge regions, eastern United States, 1993-2009

The quality of our nation's waters: water quality in the Principal Aquifers of the Piedmont, Blue Ridge, and Valley and Ridge regions, eastern United States, 1993-2009

Assessing the resiliency of surface water and groundwater systems under groundwater pumping

Assessing the restoration time of surface water and groundwater systems under groundwater pumping

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