California Water Science Center

Publications

Filter Total Items: 1,388
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Year Published: 2019

Pesticide Mixtures in the Sacramento–San Joaquin Delta, 2016–17: Results from Year 2 of the Delta Regional Monitoring Program

The Delta Regional Monitoring Program was developed by the Central Valley Regional Water Quality Control Board in response to the decline of pelagic fish species in the Sacramento–San Joaquin Delta that was observed in the early 2000s. The U.S. Geological Survey, in cooperation with the Delta Regional Monitoring Program, has been responsible for...

De Parsia, Matthew; Woodward, Emily E.; Orlando, James L.; Hladik, Michelle L.
De Parsia, M., Woodward, E.E., Orlando, J.L., and Hladik, M.L., 2019, Pesticide mixtures in the Sacramento–San Joaquin Delta, 2016–17: Results from year 2 of the Delta Regional Monitoring Program: U.S. Geological Survey Data Series 1120, 33 p., https://doi.org/10.3133/ds1120.

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Year Published: 2019

Observations of the spawning ecology of the imperiled Clear Lake Hitch Lavinia exilicauda chi

Migrations for the purposes of reproduction are widely documented across the animal kingdom and are particularly common in fishes and other aquatic organisms (Dingle 2014). One important migration strategy in fishes is potamodromy, which is the movement from one location to another entirely within freshwater (Morais and Daverat 2016). Thurow (...

Feyrer, Frederick
Feyrer, F, 2019, Observations of the spawning ecology of the imperiled Clear Lake Hitch Lavinia exilicauda chi: California Fish and Game

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Year Published: 2019

Near-field receiving-water monitoring of trace metals and a benthic community near the Palo Alto Regional Water Quality Control Plant in south San Francisco Bay, California—2018

Trace-metal concentrations in sediment and in the clam Macoma petalum (formerly reported as Macoma balthica), clam reproductive activity, and benthic macroinvertebrate community structure were investigated in a mudflat 1 kilometer south of the discharge of the Palo Alto Regional Water Quality Control Plant (PARWQCP) in south San...

Cain, Daniel J.; Thompson, Janet K.; Parchaso, Francis; Pearson, Sarah; Stewart, Robin; Turner, Matthew A.; Shrader, Kelly H.; Zierdt Smith, Emily L.; Luoma, Samuel N.
Cain, D.J., Thompson, J.K., Parchaso, F., Pearson, S., Stewart, R., Turner, M., Shrader, K.H., Zierdt Smith, E.L., and Luoma, S.N., 2019, Near-field receiving-water monitoring of trace metals and a benthic community near the Palo Alto Regional Water Quality Control Plant in south San Francisco Bay, California—2018: U.S. Geological Survey Open-File Report 2019–1084, 41 p., https://doi.org/10.3133/ofr20191084.

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Year Published: 2019

Summary of hydrologic testing, wellbore-flow data, and expanded water-level and water-quality data, 2011–15, Fort Irwin National Training Center, San Bernardino County, California

In view of the U.S. Army’s historical reliance and plans to increase demands on groundwater to supply its operations at Fort Irwin National Training Center (NTC), California, coupled with the continuing water-level declines in some developed groundwater basins as a result of pumping, the U.S. Geological Survey (USGS), in cooperation with the U.S....

Nawikas, Joseph M.; Densmore, Jill N.; O'Leary, David R.; Buesch, David C.; Izbicki, John A.
Nawikas, J.M., Densmore, J.N., O’Leary, D.R., Buesch, D.C., and Izbicki, J.A., 2019, Summary of hydrologic testing, wellbore-flow data, and expanded water-level and water-quality data, 2011–15, Fort Irwin National Training Center, San Bernardino County, California: U.S. Geological Survey Scientific Investigations Report 2019–5091, 161 p., https://doi.org/10.3133/sir20195091.

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Year Published: 2019

Quantifying the eroded and deposited mass of mercury-contaminated sediment by using terrestrial laser scanning at the confluence of Humbug Creek and the South Yuba River, Nevada County, California, 2011–13

High-resolution, terrestrial laser scanning, also known as ground-based lidar (light detection and ranging), was used to quantify the volume of mercury-contaminated sediment eroded from an outcrop of historical placer-mining debris at the confluence of Humbug Creek and the South Yuba River in the Sierra Nevada foothills, about 17 kilometers...

Howle, James F.; Alpers, Charles N.; Kitchen, Jeffrey; Bawden, Gerald W.; Bond, Sandra
Howle, J.F., Alpers, C.N., Kitchen, J., Bawden, G.W., and Bond, S., 2019, Quantifying the eroded and deposited mass of mercury-contaminated sediment by using terrestrial laser scanning at the confluence of Humbug Creek and the South Yuba River, Nevada County, California, 2011–13: U.S. Geological Survey Scientific Investigations Report 2019– 5104, 30 p., https://doi.org/10.3133/sir20195104.

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Year Published: 2019

Dissolved oxygen controls summer habitat of Clear Lake Hitch (Lavinia exilicauda chi), an imperilled potamodromous cyprinid

The Clear Lake Hitch is an imperiled minnow endemic to Clear Lake, Lake County, California, USA that is listed as threatened under the California Endangered Species Act (ESA) and is a candidate for listing under the United States ESA. It exhibits a potamodromous life cycle whereby adults, which reach up to 6+ years in age and over 350 mm in...

Feyrer, Frederick; Young, Matthew; Patton, Oliver; Ayers, David E.

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Year Published: 2019

Anthropogenic and geologic causes of anomalously high uranium concentrations in groundwater used for drinking water supply in the southeastern San Joaquin Valley, CA

Concentrations of uranium (U) >30 µg/L in groundwater are relatively uncommon in drinking water in the United States but can be of concern in those areas where complex interactions of aquifer materials and anthropogenic alterations of the natural flow regime mobilize uranium. High concentrations (>30 µg/L) of U in the southeastern San...

Rosen, Michael R.; Burow, Karen R.; Fram, Miranda

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Year Published: 2019

Scenarios of climate adaptation potential on protected working lands from management of soils

Management of protected lands may enhance ecosystem services that conservation programs were designed to protect. Practices that build soil organic matter (SOM) on agricultural lands also increase soil water holding capacity, potentially reducing climatic water deficit (CWD), increasing actual evapotranspiration (AET) and increasing groundwater...

Byrd, Kristin B.; Alvarez, P.; Sleeter, Benjamin; Flint, Lorraine E.; Cameron, D. Richard; Creque, J.

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Year Published: 2019

Guidelines and standard procedures for high-frequency groundwater-quality monitoring stations—Design, operation, and record computation

High-frequency water-quality monitoring stations measure and transmit data, often in near real-time, from a wide range of aquatic environments to assess the quality of the Nation’s water resources. Common instrumentation for high-frequency water-quality data collection uses a multi-parameter sonde, which typically has sensors that measure and...

Mathany, Timothy M.; Saraceno, John Franco; Kulongoski, Justin T.
Mathany, T.M., Saraceno, J.F., and Kulongoski, J.T., 2019, Guidelines and standard procedures for high-frequency groundwater-quality monitoring stations—Design, operation, and record computation: U.S. Geological Survey Techniques and Methods 1–D7, 54 p., https://doi.org/10.3133/tm1D7.

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Year Published: 2019

Arsenic variability and groundwater age in three water supply wells in southeast New Hampshire

Three wells in New Hampshire were sampled bimonthly over three years to evaluate the temporal variability of arsenic concentrations and groundwater age. All samples had measurable concentrations of arsenic throughout the entire sampling period and concentrations in individual wells varied, on average, by more than 7 µg/L. High arsenic...

Levitt, Joseph; Degnan, James; Flanagan, Sarah; Jurgens, Bryant

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Year Published: 2019

Delineation of spatial extent, depth, thickness, and potential volume of aquifers used for domestic and public water-supply in the Central Valley, California

Identification of the groundwater resources used for drinking-water supplies is essential for the design of strategies to manage those resources. In this study, the spatial extent, depths, thicknesses, and volumes of groundwater aquifers used for domestic and public drinking-water supply were estimated from locations and well-construction data...

Voss, Stefan; Jurgens, Bryant C.; Fram, Miranda S.; Bennett V, George L.
Voss, S.A., Jurgens, B.C., Fram, M.S., and Bennett, G.L., V, 2019, Delineation of spatial extent, depth, thickness, and potential volume of aquifers used for domestic and public water-supply in the Central Valley, California: U.S. Geological Survey Scientific Investigations Report 2019–5076, 34 p., https://doi.org/10.3133/sir20195076.

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Year Published: 2019

Tritium as an indicator of modern, mixed, and premodern groundwater age

Categorical classification of groundwater age is often used for the assessment and understanding of groundwater resources. This report presents a tritium-based age classification system for the conterminous United States based on tritium (3H) thresholds that vary in space and time: modern (recharged in 1953 or later), if the measured value is...

Lindsey, Bruce D.; Jurgens, Bryant C.; Belitz, Kenneth
Lindsey, B.D., Jurgens, B.C., and Belitz, K., 2019, Tritium as an indicator of modern, mixed, and premodern groundwater age: U.S. Geological Survey Scientific Investigations Report 2019–5090, 18 p., https://doi.org/10.3133/sir20195090.