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Filter Total Items: 15,302
Year Published: 2015

A water-budget approach to estimating potential groundwater recharge from two domestic sewage disposal fields in eastern Bernalillo County, New Mexico, 2011-12

Eastern Bernalillo County, New Mexico, is a historically rural area that in recent years has experienced an increase in population and in the construction of new housing units, most of which are not connected to a centralized wastewater treatment system. Increasing water use has raised concerns about the effect of development on the available...

Crilley, Dianna M.; Collison, Jake W.
Crilley, D.M., and Collison, J.W., 2015, A water-budget approach to estimating potential groundwater recharge from two domestic sewage disposal fields in eastern Bernalillo County, New Mexico, 2011–12: U.S. Geological Survey Scientific Investigations Report 2015–5060, 32 p., http://dx.doi.org/10.3133/sir20155060.

Year Published: 2015

Mixing effects on nitrogen and oxygen concentrations and the relationship to mean residence time in a hyporheic zone of a riffle-pool sequence

Flow paths and residence times in the hyporheic zone are known to influence biogeochemical processes such as nitrification and denitrification. The exchange across the sediment-water interface may involve mixing of surface water and groundwater through complex hyporheic flow paths that contribute to highly variable biogeochemically active zones....

Naranjo, Ramon C.; Niswonger, Richard G.; Clinton Davis
Naranjo, R. C., Niswonger, R. G. and Davis, C. (2015), Mixing effects on nitrogen and oxygen concentrations and the relationship to mean residence time in a hyporheic zone of a riffle-pool sequence. Water Resour. Res. doi:10.1002/2014WR016593

Year Published: 2015

Multimodel analysis of anisotropic diffusive tracer-gas transport in a deep arid unsaturated zone

Gas transport in the unsaturated zone affects contaminant flux and remediation, interpretation of groundwater travel times from atmospheric tracers, and mass budgets of environmentally important gases. Although unsaturated zone transport of gases is commonly treated as dominated by diffusion, the characteristics of transport in deep layered...

Green, Christopher T.; Walvoord, Michelle Ann; Andraski, Brian J.; Striegl, Robert G.; Stonestrom, David A.
Green, C. T., M. A. Walvoord, B. J. Andraski, R. G. Striegl, and D. A. Stonestrom (2015), Multimodel analysis of anisotropic diffusive tracergas transport in a deep arid unsaturated zone, Water Resour. Res., 51, doi:10.1002/2014WR016055.

Year Published: 2015

Optimizing fish sampling for fish - mercury bioaccumulation factors

Fish Bioaccumulation Factors (BAFs; ratios of mercury (Hg) in fish (Hgfish) and water (Hgwater)) are used to develop Total Maximum Daily Load and water quality criteria for Hg-impaired waters. Both applications require representative Hgfish estimates and, thus, are sensitive to sampling and data-treatment methods. Data collected by fixed protocol...

Scudder Eikenberry, Barbara C.; Riva-Murray, Karen; Knightes, Christopher D.; Journey, Celeste A.; Chasar, Lia C.; Brigham, Mark E.; Bradley, Paul M.
Scudder Eikenberry, BC, K Riva-Murray, CD Knightes, CA Journey, LC Chasar, ME Brigham, PM Bradley. 2015. Optimizing fish sampling for fish–mercury bioaccumulation factors. Chemosphere. 135: 467-473.

Year Published: 2015

Sediment and nutrient trapping as a result of a temporary Mississippi River floodplain restoration: The Morganza Spillway during the 2011 Mississippi River Flood

The 2011 Mississippi River Flood resulted in the opening of the Morganza Spillway for the second time since its construction in 1954 releasing 7.6 km3 of water through agricultural and forested lands in the Morganza Floodway and into the Atchafalaya River Basin. This volume, released over 54 days, represented 5.5% of the Mississippi...

Kroes, Daniel; Schenk, Edward R.; Noe, Gregory; Benthem, Adam J.

Year Published: 2015

Screening tool to evaluate the vulnerability of down-gradient receptors to groundwater contaminants from uncapped landfills

A screening tool for quantifying levels of concern for contaminants detected in monitoring wells on or near landfills to down-gradient receptors (streams, wetlands and residential lots) was developed and evaluated. The tool uses Quick Domenico Multi-scenario (QDM), a spreadsheet implementation of Domenico-based solute transport, to estimate...

Baker, Ronald J.; Reilly, Timothy J.; Lopez, Anthony R.; Romanok, Kristin M.; Wengrowski, Edward W

Year Published: 2015

Sources of high-chloride water and managed aquifer recharge in an alluvial aquifer in California, USA

As a result of pumping in excess of recharge, water levels in alluvial aquifers within the Eastern San Joaquin Groundwater Subbasin, 130 km east of San Francisco (California, USA), declined below sea level in the early 1950s and have remained so to the present. Chloride concentrations in some wells increased during that time and exceeded the US...

O'Leary, David; Izbicki, John A.; Metzger, Loren F.

Year Published: 2015

Preserved filamentous microbial biosignatures in the Brick Flat gossan, Iron Mountain, California

A variety of actively precipitating mineral environments preserve morphological evidence of microbial biosignatures. One such environment with preserved microbial biosignatures is the oxidized portion of a massive sulfide deposit, or gossan, such as that at Iron Mountain, California. This gossan may serve as a mineralogical analogue to some...

Williams, Amy J.; Sumner, Dawn Y.; Alpers, Charles N.; Karunatillake, Suniti; Hofmann, Beda A
Williams, A.J., Sumner, D.Y., Alpers, C.N., Karunatillake, S, and Hofmann, B.A., 2015, Preserved filamentous microbial biosignatures in the Brick Flat gossan, Iron Mountain, California. Astrobiology, v. 15(8): 637–668.

Year Published: 2015

Reducing fertilizer-nitrogen losses from rowcrop landscapes: Insights and implications from a spatially explicit watershed model

We present conceptual and quantitative models that predict changes in fertilizer-derived nitrogen delivery from rowcrop landscapes caused by agricultural conservation efforts implemented to reduce nutrient inputs and transport and increase nutrient retention in the landscape. To evaluate the relative importance of changes in the sources, transport...

McLellan, Eileen; Schilling, Keith; Robertson, Dale M.

Year Published: 2015

StreamStats in Georgia: a water-resources web application

Summary Part of the mission of the U.S. Geological Survey (USGS) is to provide information on streamflow in the Nation's streams to help understand the Nation's water resources. Streamflow statistics are used by water managers, engineers, scientists, and others to protect people and property during floods and droughts, and to manage, protect, and...

Gotvald, Anthony J.; Musser, Jonathan W.
Gotvald, A.J., and Musser, J.W., 2015, StreamStats in Georgia—A Water-Resources Web application, U.S. Geological Survey Fact Sheet 2014–3027, 2 p., http://doi.org/10.3133/fs20143027.

Year Published: 2015

Towards automating measurements and predictions of Escherichia coli concentrations in the Cuyahoga River, Cuyahoga Valley National Park, Ohio, 2012–14

Nowcasts are systems that can provide estimates of the current bacterial water-quality conditions based on predictive models using easily-measured, explanatory variables; nowcasts can provide the public with the information to make informed decisions on the risk associated with recreational activities in natural water bodies. Previous studies on...

Brady, Amie M. G.; Meg B. Plona
Brady, A.M.G., and Plona, M.B., 2015, Towards automating measurements and predictions of Escherichia coli concentrations in the Cuyahoga River, Cuyahoga Valley National Park, Ohio, 2012–14: U.S. Geological Survey Scientific Investigations Report 2015–5094, 30 p., http://dx.doi.org/10.3133/sir20155094.

Year Published: 2015

Hydrogeology of the Susquehanna River valley-fill aquifer system in the Endicott-Vestal area of southwestern Broome County, New York

The village of Endicott, New York, and the adjacent town of Vestal have historically used groundwater from the Susquehanna River valley-fill aquifer system for municipal water supply, but parts of some aquifers in this urban area suffer from legacy contamination from varied sources. Endicott would like to identify sites distant from known...

Randall, Allan D.; Kappel, William M.
Randall, A.D., and Kappel, W.M., 2015, Hydrogeology of the Susquehanna River valley-fill aquifer system in the Endicott-Vestal area of southwestern Broome County, New York: U.S. Geological Survey Scientific Investigations Report 2015–5078, 28 p. plus appendixes, http://dx.doi.org/10.3133/sir20155078.

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