Nevada Water Science Center

Publications

Publications produced by the Nevada Water Science Center are listed below. Older publications may not be available in electronic form yet. If a Nevada Water Science Center publication that you would like to view isn't listed below, please send email to  GS-W-NVpublic-info@ usgs.gov.

Filter Total Items: 323
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Year Published: 2014

Field-scale sulfur hexafluoride tracer experiment to understand long distance gas transport in the deep unsaturated zone

A gas-tracer test in a deep arid unsaturated zone demonstrates that standard estimates of effective diffusivity from sediment properties allow a reasonable first-cut assessment of gas contaminant transport. Apparent anomalies in historic transport behavior at this and other waste disposal sites may result from factors other than nonreactive gas...

Walvoord, Michelle Ann; Andraski, Brian J.; Green, Christopher T.; Stonestrom, David A.; Striegl, Robert G.
Walvoord, M.A., Andraski, B., Green, C.T., Stonestrom, D., Striegl, R. (2014) Field-scale sulfur hexafluoride tracer experiment to understand long distance gas transport in the deep unsaturated zone, Vadose Zone Journal, 13, (8) doi:10.2136/vzj2014.04.0045.

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Year Published: 2014

Development of a regionally consistent geospatial dataset of agricultural lands in the Upper Colorado River Basin, 2007-10

Irrigation in arid environments can alter the natural rate at which salts are dissolved and transported to streams. Irrigated agricultural lands are the major anthropogenic source of dissolved solids in the Upper Colorado River Basin (UCRB). Understanding the location, spatial distribution, and irrigation status of agricultural lands and the...

Buto, Susan G.; Gold, Brittany L.; Jones, Kimberly A.
Development of a regionally consistent geospatial dataset of agricultural lands in the Upper Colorado River Basin, 2007-10; 2014; SIR; 2014-5039; Buto, Susan G.; Gold, Brittany L.; Jones, Kimberly A.

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Year Published: 2014

Tritium plume dynamics in the shallow unsaturated zone in an arid environment

The spatiotemporal variability of a tritium plume in the shallow unsaturated zone and the mechanisms controlling its transport were evaluated during a 10-yr study. Plume movement was minimal and its mass declined by 68%. Upward-directed diffusive-vapor tritium fluxes and radioactive decay accounted for most of the observed plume-mass declines....

Maples, S.R.; Andraski, Brian J.; Stonestrom, David A.; Cooper, C.A.; Pohll, G.; Michel, R.L.
Tritium plume dynamics in the shallow unsaturated zone in an arid environment; 2014; Article; Journal; Vadose Zone Journal; Maples, S. R.; Andraski, B. J.; Stonestrom, D. A.; Cooper, C. A.; Pohll, G.; Michel, R. L.

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Year Published: 2014

A method for estimating spatially variable seepage and hydrualic conductivity in channels with very mild slopes

Infiltration along ephemeral channels plays an important role in groundwater recharge in arid regions. A model is presented for estimating spatial variability of seepage due to streambed heterogeneity along channels based on measurements of streamflow-front velocities in initially dry channels. The diffusion-wave approximation to the Saint-Venant...

Shanafield, Margaret; Niswonger, Richard G.; Prudic, David E.; Pohll, Greg; Susfalk, Richard; Panday, Sorab
A method for estimating spatially variable seepage and hydrualic conductivity in channels with very mild slopes; 2014; Article; Journal; Hydrological Processes; Shanafield, Margaret; Niswonger, Richard G.; Prudic, David E.; Pohll, Greg; Susfalk, Richard; Panday, Sorab

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Year Published: 2013

Evaporation from Lake Mead, Nevada and Arizona, March 2010 through February 2012

Evaporation from Lake Mead was measured using the eddy-covariance method for the 2-year period starting March 2010 and ending February 2012. When corrected for energy imbalances, annual eddy-covariance evaporation was 2,074 and 1,881 millimeters (81.65 and 74.07 inches), within the range of previous estimates. There was a 9-percent decrease in the...

Moreo, Michael T.; Swancar, Amy
Evaporation from Lake Mead, Nevada and Arizona, March 2010 through February 2012; 2013; SIR; 2013-5229; Moreo, Michael T.;Swancar, Amy

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Year Published: 2013

The distribution and modeling of nitrate transport in the Carson Valley alluvial aquifer, Douglas County, Nevada

Residents of Carson Valley in Douglas County, Nevada, rely on groundwater from an alluvial aquifer for domestic use and agricultural irrigation. Since the 1970s, there has been a rapid increase in population in several parts of the valley that rely on domestic wells for drinking water and septic systems for treatment of household waste. As a...

Naranjo, Ramon C.; Welborn, Toby L.; Rosen, Michael R.
The distribution and modeling of nitrate transport in the Carson Valley alluvial aquifer, Douglas County, Nevada; 2013; SIR; 2013-5136; Naranjo, Ramon C.; Welborn, Toby L.; Rosen, Michael R.

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Year Published: 2013

Using heat as a tracer to estimate spatially distributed mean residence times in the hyporheic zone of a riffle-pool sequence

Biochemical reactions that occur in the hyporheic zone are highly dependent on the time solutes that are in contact with sediments of the riverbed. In this investigation, we developed a 2-D longitudinal flow and solute-transport model to estimate the spatial distribution of mean residence time in the hyporheic zone. The flow model was calibrated...

Naranjo, Ramon C.
Using heat as a tracer to estimate spatially distributed mean residence times in the hyporheic zone of a riffle-pool sequence; 2013; Article; Journal; Water Resources Research; Naranjo, Ramon C.

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Year Published: 2013

Appraising options to reduce shallow groundwater tables and enhance flow conditions over regional scales in an irrigated alluvial aquifer system

Some of the world’s key agricultural production systems face big challenges to both water quantity and quality due to shallow groundwater that results from long-term intensive irrigation, namely waterlogging and salinity, water losses, and environmental problems. This paper focuses on water quantity issues, presenting finite-difference groundwater...

Morway, Eric D.; Gates, Timothy K.; Niswonger, Richard G.
Appraising options to reduce shallow groundwater tables and enhance flow conditions over regional scales in an irrigated alluvial aquifer system; 2013; Article; Journal; Journal of Hydrology; Morway, Eric D.; Gates, Timothy K.; Niswonger, Richard G.

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Year Published: 2013

Modeling variably saturated multispecies reactive groundwater solute transport with MODFLOW-UZF and RT3D

A numerical model was developed that is capable of simulating multispecies reactive solute transport in variably saturated porous media. This model consists of a modified version of the reactive transport model RT3D (Reactive Transport in 3 Dimensions) that is linked to the Unsaturated-Zone Flow (UZF1) package and MODFLOW. Referred to as UZF-RT3D...

Bailey, Ryan T.; Morway, Eric D.; Niswonger, Richard G.; Gates, Timothy K.
Modeling variably saturated multispecies reactive groundwater solute transport with MODFLOW-UZF and RT3D; 2013; Article; Journal; Groundwater; Bailey, Ryan T.; Morway, Eric D.; Niswonger, Richard G.; Gates, Timothy K.

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Year Published: 2013

Properties of basin-fill deposits, a 1971–2000 water budget, and surface-water-groundwater interactions in the upper Humboldt River basin, northeastern Nevada

This study was done in cooperation with Elko County, Nevada in response to concerns over growing demand for water within the county and increasing external demands that are occurring statewide. The upper Humboldt River basin encompasses 4,360 square miles in northeastern Nevada and includes the headwaters area of the Humboldt River. Nearly all of...

Plume, Russell W.; Smith, J. LaRue
Properties of basin-fill deposits, a 1971–2000 water budget, and surface-water-groundwater interactions in the upper Humboldt River basin, northeastern Nevada; 2013; SIR; 2013-5077; Plume, Russell W.; Smith, J. L.

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Year Published: 2013

Lake Mead--clear and vital

“Lake Mead – Clear and Vital” is a 13 minute documentary relating the crucial role of science in maintaining high water quality in Lake Mead. The program was produced coincident with release of the Lakes Mead and Mohave Circular a USGS publication covering past and on-going research in the lakes and tributaries of the Lake Mead National Recreation...

Wessells, Stephen M.; Rosen, Michael
Lake Mead--clear and vital; 2013; GIP; 148; Wessells, Stephen M.; Rosen, Michael

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Year Published: 2013

Detecting drawdowns masked by environmental stresses with water-level models

Detecting and quantifying small drawdown at observation wells distant from the pumping well greatly expands the characterized aquifer volume. However, this detection is often obscured by water level fluctuations such as barometric and tidal effects. A reliable analytical approach for distinguishing drawdown from nonpumping water-level fluctuations...

Garcia, C.A.; Halford, K.J.; Fenelon, J.M.
Detecting drawdowns masked by environmental stresses with water-level models; 2013; Article; Journal; Groundwater; Garcia, C. A.; Halford, K. J.; Fenelon, J. M.