California Water Science Center

Publications

Filter Total Items: 1,341
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Year Published: 2019

Use of Set Blanks in Reporting Pesticide Results at the U.S. Geological Survey National Water Quality Laboratory, 2001–15

Executive SummaryBackground.—Pesticide results from the U.S. Geological Survey (USGS) National Water Quality Laboratory (NWQL) are used for water-quality assessments by many agencies and organizations. The USGS is committed to providing data of the highest possible quality to the consumers of its data. A cooperator’s inquiries about specific...

Medalie, Laura; Sandstrom, Mark W.; Toccalino, Patricia L.; Foreman, William T.; ReVello, Rhiannon C.; Bexfield, Laura M.; Riskin, Melissa L.
Medalie, L., Sandstrom, M.W., Toccalino, P.L., Foreman, W.T., ReVello, R.C., Bexfield, L.M., and Riskin, M.L., 2019, Use of set blanks in reporting pesticide results at the U.S. Geological Survey National Water Quality Laboratory, 2001–15: U.S. Geological Survey Scientific Investigations Report 2019–5055, 147 p., https://doi.org/10.3133/sir20195055.

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Year Published: 2019

Hydrocarbons in upland groundwater, Marcellus Shale Region, Northeastern Pennsylvania and Southern New York, USA

Water samples from 50 domestic wells located <1 km (proximal) and >1 km (distal) from shale-gas wells in upland areas of the Marcellus Shale region were analyzed for chemical, isotopic, and groundwater-age tracers. Uplands were targeted because natural mixing with brine and hydrocarbons from deep formations is less common in those areas...

McMahon, Peter B.; Lindsey, Bruce D.; Conlon, Matthew D.; Hunt, Andrew G.; Belitz, Kenneth; Jurgens, Bryant; Varela, Brian

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Year Published: 2019

Hydraulic, geochemical, and thermal monitoring of an aquifer system in the vicinity of Mammoth Lakes, Mono County, California, 2015–17

Since 2014, the U.S. Geological Survey has been working in cooperation with the Bureau of Land Management, Mono County, Ormat Technologies, Inc., and the Mammoth Community Water District to design and implement a groundwater-monitoring program for the proposed Casa Diablo IV Geothermal Power Project in Long Valley Caldera, California, to...

Howle, James F.; Evans, William C.; Galloway, Devin L.; Hsieh, Paul A.; Hurwitz, Shaul; Smith, Gregory A.; Nawikas, Joseph
Howle, J.F., Evans, W.C., Galloway, D.L., Hsieh, P.A., Hurwitz, S., Smith, G.A., and Nawikas, J., 2019, Hydraulic, geochemical, and thermal monitoring of an aquifer system in the vicinity of Mammoth Lakes, Mono County, California, 2015–17: U.S. Geological Survey Open-File Report 2019–1063, 90 p., https://doi.org/10.3133/ofr20191063.

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Year Published: 2019

Estimating domestic well locations and populations served in the contiguous U.S. for years 2000 and 2010

Domestic wells provide drinking water supply for approximately 40 million people in the United States. Knowing the location of these wells, and the populations they serve, is important for identifying heavily used aquifers, locations susceptible to contamination, and populations potentially impacted by poor-quality groundwater. The 1990 census was...

Johnson, Tyler D.; Belitz, Kenneth; Lombard, Melissa

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Year Published: 2019

Evaluation of land subsidence and ground failures at Bicycle Basin, Fort Irwin National Training Center, California, 1992–2017

Groundwater has been pumped in the Bicycle Basin at Fort Irwin National Training Center since the 1960s, and the amount pumped has generally increased since the 1990s. After a large crack (approximately 0.5-kilometer long) formed at the surface of Bicycle Lake playa during 2005–06 in the area used as an aircraft runway, a...

Densmore, Jill; Ellett, Kevin M.; Sneed, Michelle; Brandt, Justin T.; Howle, James F.; Morita, Andrew Y.; Borela, Rodrigo; Bobet, Antonio; Thayer, Drew C.
Densmore, J.N., Ellett, K.M., Sneed, M., Brandt, J.T., Howle, J.F., Morita, A.Y., Borela, R., Bobet, A., and Thayer, D.C., 2019, Evaluation of land subsidence and ground failures at Bicycle Basin, Fort Irwin National Training Center, California, 1992–2017: U.S. Geological Survey Scientific Investigations Report 2019–5015, 93 p., https://doi.org/10.3133/sir20195015.

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Year Published: 2019

Groundwater quality in shallow aquifers in the western Mojave Desert, California

Groundwater provides more than 40 percent of California’s drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project (PBP) of the GAMA Program provides a comprehensive assessment of the State’s groundwater quality and increases public...

Groover, Krishangi D.; Goldrath, Dara A.
Groover, K.D., and Goldrath, D.A., 2019, Groundwater quality in shallow aquifers in the western Mojave Desert, California: U.S. Geological Survey Fact Sheet 2019–3033, 4 p., https://doi.org/10.3133/fs20193033.

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Year Published: 2019

Dam effects on bedload transport on the upper Santa Ana River, California, and implications for native fish habitat

Dams disrupt the flow of water and sediment and thus have the potential to affect the downstream geomorphic characteristics of a river. Though there are some well‐known and common geomorphic responses to dams, such as bed armouring, the response downstream from any particular dam is dependent on local conditions. Herein, we investigate the...

Wright, Scott A.; Minear, J Toby

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Year Published: 2019

Turbidity current observations in a large reservoir following a major wildfire

Turbidity currents are generated when denser river water plunges and flows along the bottom of a lake, reservoir, or ocean. The plunging and downstream movement are driven by density differences due to temperature and/or suspended sediment, and currents have been observed to move slowly over long distances. This study presents observations of...

Wright, Scott A.; Marineau, Mathieu D.

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Year Published: 2019

The importance of groundwater flow to the formation of modern thrombolitic microbialites

Modern microbialites are often located within groundwater discharge zones, yet the role of groundwater in microbialite accretion has yet to be resolved. To understand relationships between groundwater, microbialites, and associated microbial communities, we quantified and characterized groundwater flow and chemistry in active thrombolitic...

Warden, John; Coshell, Lee; Rosen, Michael R.; Breecker, Daniel O.; Ruthrof, Katinka X.; Omelon, Christopher R.

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Year Published: 2019

Groundwater quality of a public supply aquifer in proximity to oil development, Fruitvale Oil Field, Bakersfield, California

Due to concerns over the effects of oil production activities on groundwater quality in California, chemical, isotopic, dissolved gas and age-dating tracers were analyzed in samples collected from public-supply wells and produced-water sites in the Fruitvale oil field (FVOF). A combination of newly collected and historical data was used to...

Wright, Michael; McMahon, Peter B.; Landon, Matthew K.; Kulongoski, Justin T.

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Year Published: 2019

Aluminum- and iron-based coagulation for in-situ removal of dissolved organic carbon, disinfection byproducts, mercury and other constituents from agricultural drain water

Agricultural production on wetland soils can be significant sources of dissolved organic carbon (DOC), disinfection byproduct precursors, mercury and nutrients to downstream water bodies and accelerate land subsidence. Presented as a potential solution for in-situ water quality improvement and land subsidence mitigation, chemically enhanced...

Bachand, Sandra M.; Kraus, Tamara E. C.; Stern, Dylan; Ling Liang, Yan; Horwath, William R.; Bachand, Philip A. M.

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Year Published: 2019

Groundwater quality in the Sacramento Metropolitan shallow aquifer, California

The Sacramento metropolitan (SacMetro) study unit covers approximately 3,250 square kilometers of the Central Valley along the eastern edge of the northern and southern ends of the San Joaquin and Sacramento Valleys, respectively. Groundwater withdrawals supply a significant portion of the water-resource needs of the region. In the southern...

Bennett V, George L.
Bennett, G.L. V, 2019, Groundwater quality in the Sacramento Metropolitan shallow aquifer, California: U.S. Geological Survey Open-File Report 2019–1047, 4 p., https://doi.org/10.3133/ofr20191047.