California Water Science Center

Publications

Filter Total Items: 1,450
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Year Published: 2021

Trends in nitrogen, phosphorus, and sediment concentrations and loads in streams draining to Lake Tahoe, California, Nevada, USA

Lake Tahoe, a large freshwater lake of the eastern Sierra Nevada in California and Nevada, has 63 tributaries that are sources of nutrients and sediment to the lake. The Tahoe watershed is relatively small, and the surface area of the lake occupies about 38% of the watershed area (1313 km2). Only about 6% of the watershed is urbanized or...

Domagalski, Joseph L.; Morway, Eric D.; Alvarez, Nancy L.; Hutchins, Juliet; Rosen, Michael R.; Coats, Robert

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Year Published: 2020

Influenza A viruses remain infectious for more than seven months in northern wetlands of North America

In this investigation, we used a combination of field- and laboratory-based approaches to assess if influenza A viruses (IAVs) shed by ducks could remain viable for extended periods in surface water within three wetland complexes of North America. In a field experiment, replicate filtered surface water samples inoculated with duck swabs were...

Ramey, Andrew M.; Reeves, Andrew B.; Drexler, Judith Z.; Ackerman, Joshua T.; De La Cruz, Susan E. W.; Lang, Andrew S.; Leyson, Christina; Link, Paul T.; Prosser, Diann; Robertson, Gregory J.; Wight, Jordan; Youk, Sungsu; Spackman, Erica; Pantin-Jackwood, Mary; Poulson, Rebecca L.; Stallknecht, David E.

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Year Published: 2020

Water Quality of groundwater used for public supply in principal aquifers of the western United States

Groundwater provides nearly half of the Nation’s drinking water. As the Nation’s population grows, the importance of (and need for) high-quality drinking-water supplies increases. As part of a national-scale effort to assess groundwater quality in principal aquifers (PAs) that supply most of the groundwater used for public supply, the U.S....

Rosecrans, Celia Z.; Musgrove, MaryLynn
Rosecrans, C.Z., and Musgrove, M., 2020, Water Quality of groundwater used for public supply in principal aquifers of the western United States: U.S. Geological Survey Scientific Investigations Report 2020–5078, 142 p., https://doi.org/10.3133/sir20205078.

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Year Published: 2020

Detection and measurement of land subsidence and uplift using Global Positioning System surveys and interferometric synthetic aperture radar, Coachella Valley, California, 2010–17

Groundwater has been a major source of agricultural, recreational, municipal, and domestic supply in the Coachella Valley of California since the early 1920s. Pumping of groundwater resulted in groundwater-level declines as large as 50 feet (ft) or 15 meters (m) by the late 1940s. Because of concerns that the declines could cause land subsidence,...

Sneed, Michelle; Brandt, Justin T.
Sneed, M., and Brandt, J.T., 2020, Detection and measurement of land subsidence and uplift using Global Positioning System surveys and interferometric synthetic aperture radar, Coachella Valley, California, 2010–17: U.S. Geological Survey Scientific Investigations Report 2020–5093, 74 p., https://doi.org/10.3133/sir20205093.

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Year Published: 2020

Causes of variability in suspended‐sand concentration evaluated using measurements in the Colorado River in Grand Canyon

Rivers commonly exhibit substantial variability in suspended‐sand concentration, even at constant water discharge. Here we derive an approach for evaluating how much of this variability arises from mean bed‐sand grain size. We apply this approach to the Colorado River in Grand Canyon, where discharge‐independent concentration of suspended sand...

Rubin, David M.; Buscombe, Daniel; Wright, Scott A.; Topping, David; Grams, Paul; Schmidt, John C.; Hazel, J.E.; Kaplinski, Matthew A.; Tusso, Robert B.

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Year Published: 2020

Pesticide concentrations associated with augmented flow pulses in the Yolo Bypass and Cache Slough Complex, California

Surface-water and suspended-sediment samples were collected and analyzed by the U.S. Geological Survey for multiple current-use pesticides and pesticide degradates approximately every 2 weeks at up to five sites in the Yolo Bypass and Cache Slough Complex before, during, and after augmented flow pulses in summer and fall 2016 and 2018 as well as...

Orlando, James L.; De Parsia, Matt; Sanders, Corey; Hladik, Michelle; Frantzich, Jared
Orlando, J.L., De Parsia, M., Sanders, C., Hladik, M., and Frantzich, J., 2020, Pesticide concentrations associated with augmented flow pulses in the Yolo Bypass and Cache Slough Complex, California: U.S. Geological Survey Open-File Report 2020–1076, 101 p., https://doi.org/10.3133/ofr20201076.

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Year Published: 2020

Trapping of suspended sediment by submerged aquatic vegetation in a tidal freshwater region: Field observations and long-term trends

Widespread invasion by non-native, submerged aquatic vegetation (SAV) may modify the sediment budget of an estuary, reducing the availability of inorganic sediment required by marshes to maintain their position in the tidal frame. The instantaneous trapping rate of suspended sediment in SAV patches in an estuary has not previously been quantified...

Work, Paul A.; Downing-Kunz, Maureen A.; Drexler, Judith Z.

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Year Published: 2020

Sediment lithology and borehole erosion testing, American and Sacramento Rivers, California

Executive SummaryA field investigation intended to measure the potential for erosion of sediments beside the American and Sacramento Rivers near Sacramento, California, is described. The study featured two primary components: (1) drilling and soil sampling to reveal lithology, down to depths matching the local river thalweg, where possible, and (2...

Work, Paul A.; Livsey, Daniel N.
Work, P., and Livsey, D., 2020, Sediment lithology and borehole erosion testing, American and Sacramento Rivers, California: U.S. Geological Survey Scientific Investigations Report 2020–5063, 92 p., https://doi.org/10.3133/sir20205063.

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Year Published: 2020

A summary of water-quality monitoring in San Francisco Bay in water year 2017

This report summarizes the activities of the U.S. Geological Survey (USGS) San Francisco Bay Water-Quality Monitoring and Sediment Transport Project during water year 2017, including an explanation of methods employed, stations operated, and a graphical summary of data for the period of record for stations operational in water year 2017. In...

Livsey, Daniel N.; Downing-Kunz, Maureen A.
Livsey, D., and Downing-Kunz, M., 2020, A summary of water-quality monitoring in San Francisco Bay in water year 2017: U.S. Geological Survey Scientific Investigations Report 2020–5064, 78 p., https://doi.org/10.3133/sir20205064.

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Year Published: 2020

Regional patterns in hydrologic response, a new three-component metric for hydrograph analysis and implications for ecohydrology, Northwest Volcanic Aquifer Study Area, USA

Study RegionOregon, California, Idaho, Nevada and UtahStudy FocusSpatial patterns of hydrologic response were examined for the Northwest Volcanic Aquifer Study Area (NVASA). The utility of established hydrograph-separation methods for assessing hydrologic response in permeable volcanic terranes was assessed and a new three-component metric for...

Curtis, Jennifer A.; Burns, Erick; Sando, Roy

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Year Published: 2020

Precipitation runoff modeling system (PRMS) as part of an integrated hydrologic model for the Osage Nation, northeastern Oklahoma, 1915–2014

Executive SummaryThe Osage Nation lacks a comprehensive tribal water plan to describe the quality and quantity of water resources in the Osage Nation, a 2,304-square-mile (mi2) area of rolling pastures, tallgrass prairie, and mixed woodlands in northeastern Oklahoma. A tribal water plan can be used to help manage the sustainable development of...

Hevesi, Joseph A.; Hanson, Randall T.; Masoner, Jason R.
Hevesi, J.A., Hanson, R.T., and Masoner, J.R., 2019, Precipitation runoff modeling system (PRMS) as part of an integrated hydrologic model for the Osage Nation, northeastern Oklahoma, 1915–2014: U.S. Geological Survey Scientific Investigations Report 2019–5030, 142 p., https://doi.org/10.3133/sir20195030.

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Year Published: 2020

The future of sediment transport and streamflow under a changing climate and the implications for long-term resilience of the San Francisco Bay-Delta

Sedimentation and turbidity have effects on habitat suitability in the San Francisco Bay‐Delta (Bay‐Delta), concerning key species in the bay as well as the ability of the delta marshes to keep pace with sea level rise. A daily rainfall runoff and transport model of the Sacramento River Basin of northern California was developed to simulate...

Stern, Michelle A.; Flint, Lorraine E.; Flint, Alan L; Knowles, Noah; Wright, Scott A.