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News

Date published: April 11, 2019

Salinity Cycles in Lower Colorado River Caused by Precipitation Patterns in Upper Basin

A new study shows that mysterious cycles in salinity in the lower Colorado River are a result of precipitation patterns in the headwaters of the upper basin more than a thousand river miles away. The salinity levels generally repeat about every 10 years.

Date published: March 18, 2019

Mercury Concentrations in Lake Powell Higher in Side Canyons

Mercury concentrations within Lake Powell are highest in side canyons within the lower portion of the reservoir, according to a new U.S. Geological Survey report. This finding is part of a study to better understand why mercury concentrations in striped bass are higher in the lower part of the reservoir.

Date published: November 20, 2018

View Sediment Core Collection on Lake Powell

Reporters: RSVP to Visit Coring Site on Lake Powell

Publications

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Year Published: 2018

Assessment of managed aquifer recharge at Sand Hollow Reservoir, Washington County, Utah, updated to conditions through 2016

Sand Hollow Reservoir in Washington County, Utah, was completed in March 2002 and is operated primarily for managed aquifer recharge by the Washington County Water Conservancy District. From 2002 through 2016, surface-water diversions of about 256,000 acre-feet (acre-ft) to Sand Hollow Reservoir have allowed the reservoir to remain nearly full...

Marston, Thomas M.; Nelson, Nora C.
Marston, T.M., and Nelson, N.C., 2018, Assessment of managed aquifer recharge at Sand Hollow Reservoir, Washington County, Utah, updated to conditions through 2016: U.S. Geological Survey Open-File Report 2018–1140, 38 p., https://doi.org/10.3133/ofr20181140.

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Year Published: 2018

Stream‐centric methods for determining groundwater contributions in karst mountain watersheds

Climate change influences on mountain hydrology are uncertain, but likely to be mediated through changes in subsurface hydrologic residence times and flowpaths. The heterogeneity of karst aquifers add complexity in assessing the resiliency of these water sources to perturbation, suggesting a clear need to quantify contributions from and losses to...

Neilson, Bethany; Tennant, Hyrum; Barnes, Michelle; Stout, Trinity; Miller, Matthew P.; Gabor, Rachel S.; Jameel, Yusef; Millington, Mallory; Gelderloos, Andrew; Bowen, Gabriel J.; Brooks, Paul D.
Neilson, B.T., H. Tennant, T.L. STout, M. Miller, R.S. Gabor, Y. Jameel, M. Millington, A. Gelderloos, G. Bowen, and P. Brooks, 2018, Stream-centric methods for determining groundwater contributions in karst mountain watersehds: Water Resources Research, doi:10.1029/2018WR022664.

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Year Published: 2018

Effects of groundwater withdrawals from the Hurricane Fault zone on discharge of saline water from Pah Tempe Springs, Washington County, Utah

Pah Tempe Springs, located in Washington County, Utah, contribute about 95,000 tons of dissolved solids annually along a 1,500-foot gaining reach of the Virgin River. The river gains more than 10 cubic feet per second along the reach as thermal, saline springwater discharges from dozens of orifices located along the riverbed and above the river on...

Gardner, Philip M.
Gardner, P.M., 2018, Effects of groundwater withdrawals from the Hurricane Fault zone on discharge of saline water from Pah Tempe Springs, Washington County, Utah: U.S. Geological Survey Scientific Investigations Report 2018–5040, 41 p., https://doi.org/10.3133/sir20185040.