Publications
The following list of California Water Science Center publications includes both official USGS publications and journal articles authored by our scientists.
Filter Total Items: 1780
Occurrence of pesticides in Oregon coastal waters
Pesticides are used globally for a wide range of applications including agricultural, forestry, roadsides, freshwater systems, and personal use. While pesticides have ensured efficient crop production, they are frequently transported away from application sites and are found in almost all terrestrial and aquatic environments. Pesticides are frequently detected in watersheds and rivers...
Authors
Bria Bleil, Elise F. Granek, Michelle Hladik
Gillnet sampling methods for monitoring status and trends of Clear Lake Hitch in Clear Lake, Lake County, California
The Clear Lake Hitch (Lavinia exilicauda chi) is a minnow endemic to Clear Lake, Lake County, California. This species is listed as a threatened species under the California Endangered Species Act and has been petitioned for listing under the United States Endangered Species Act. In 2017, the U.S. Geological Survey, in cooperation with the U.S. Fish and Wildlife Service, initiated a...
Authors
Frederick Feyrer, Matthew J. Young, Brock Huntsman, Veronica Violette, Justin K. Clause, Jordan Buxton, Danielle Palm, Marissa L. Wulff, Jeff Gronemyer, Luis Santana
Simulated effects of future water availability and protected species habitat in a perennial wetland, Santa Barbara County, California
This study evaluates the potential water availability in Barka Slough and the effects of changing hydrological conditions on the aquatic habitat of five protected species. Barka Slough is a historically perennial wetland at the downstream western end of the San Antonio Creek Valley watershed (SACVW). A previously published hydrologic model of the SACVW for 1948–2018 was extended to...
Authors
Geoffrey Cromwell, Daniel Philip Culling, Matthew J. Young, Joshua Larsen
Ecological thresholds and transformations due to climate change: The role of abiotic stress
An ecological threshold is the point at which a comparatively small environmental change triggers an abrupt and disproportionately large ecological response. In the face of accelerating climate change, there is concern that abrupt ecosystem transformations will become more widespread as critical ecological thresholds are crossed. There has been ongoing debate, however, regarding the...
Authors
Michael J. Osland, John Bradford, Lauren Toth, Matthew Germino, James B. Grace, Judith Z. Drexler, Camille L. Stagg, Eric Grossman, Karen M. Thorne, Stephanie S. Romañach, Davina Passeri, Gregory Noe, Jessica R. Lacy, Ken W. Krauss, Kurt P. Kowalski, Glenn Guntenspergen, Neil Kamal Ganju, Nicholas Enwright, Joel Carr, Kristin B. Byrd, Kevin Buffington
By
Ecosystems Mission Area, California Water Science Center, Forest and Rangeland Ecosystem Science Center, Pacific Coastal and Marine Science Center, Southwest Biological Science Center, St. Petersburg Coastal and Marine Science Center, Western Ecological Research Center (WERC), Western Geographic Science Center, Woods Hole Coastal and Marine Science Center, Wetland and Aquatic Research Center , Florence Bascom Geoscience Center, Eastern Ecological Science Center
Application of Hydrologic Simulation Program—FORTRAN (HSPF) as part of an integrated hydrologic model for the Salinas Valley, California
The U.S. Geological Survey (USGS), in cooperation with the Monterey County Water Resources Agency, conducted studies to help evaluate the surface-water and groundwater resources of the Salinas Valley study area, consisting of the entire Salinas River watershed and several smaller, adjacent coastal watersheds draining into Monterey Bay. The Salinas Valley study area is a highly productive...
Authors
Joseph A. Hevesi, Wesley R. Henson, Randall T. Hanson, Elizabeth Rae Jachens, Sandra Bond, Marisa Melody Earll, Deidre Herbert
Salinas Valley integrated hydrologic and reservoir operations models, Monterey and San Luis Obispo Counties, California
The area surrounding the Salinas Valley groundwater basin in Monterey and San Luis Obispo Counties of California is a highly productive agricultural area, contributes significantly to the local economy, and provides a substantial portion of vegetables and other agricultural commodities to the Nation. This region of California provides about half of the Nation’s lettuce, celery, broccoli...
Authors
Wesley R. Henson, Randy Hanson, Scott E. Boyce, Joseph A. Hevesi, Elizabeth Rae Jachens
Patterns of water-extractable soil organic matter in the US Great Plains: Insights from the Haas Soil Archive
Novel approaches that are fast and sensitive are needed to evaluate soil change and integrate soil ecosystem properties. Carbon (C) and nitrogen (N) extracted from soil with water are associated with plant nutrients and microbial activity but information about change over time in the US Great Plains is sparse. We used cool (20°C) and hot (80°C) water extracts from historic (1947) and...
Authors
Jonathan J. Halvorson, Angela Hansen, Catherine E. Stewart, Mark A. Liebig
Updating and recalibrating the integrated Santa Rosa Plain Hydrologic Model to assess stream depletion and to simulate future climate and management scenarios in Santa Rosa, Sonoma County, California
The Santa Rosa Plain Hydrologic Model (SRPHM) was developed and published in 2014 through a collaboration between the U.S. Geological Survey (USGS) and Sonoma Water to analyze the hydrologic system in the Santa Rosa Plain watershed, help meet the increasing demand for fresh water, and prepare for future uncertainties in water resources. The original model simulated hydrological...
Authors
Ayman H. Alzraiee, Andrew Rich, Linda R. Woolfenden, Derek W. Ryter, Enrique Triana, Richard G. Niswonger
6PPD-quinone in water from the San Francisco-San Joaquin Delta, California, 2018-2024
The Sacramento-San Joaquin Delta (Delta) is an expansive river delta supplying a large portion of California’s fresh water for agriculture and residential use, and it is also an area of critical habitat for numerous state and federally listed species of concern. In many locations, urban stormwater flows directly into the Delta. 6PPD-quinone (6PPD-Q), an ozonation byproduct of a tire...
Authors
Gabrielle Pecora Black, Matt De Parsia, Matthew Uychutin, Rachael F. Lane, James L. Orlando, Michelle L. Hladik
What are the impacts of fracking operations on local water quality?
No abstract available.
Authors
Jennifer S. Harkness
Pesticide contamination detected across five wildlife refuges in the Sacramento Valley of California
An important goal for the applied ecological sciences is to understand the extent to which the biodiversity on conserved or managed lands is exposed to anthropogenic stressors. Among the various categories of conserved lands in the United States, the National Wildlife Refuge System is focused on the protection and management of native wildlife and plant populations. Refuge lands can be...
Authors
Angie Lenard, Therese Burns, Michelle L. Hladik, Kaylene Keller, Samantha Marcum, Wayne E. Thogmartin, Matthew L. Forister
Characterizing pyrethroid and fipronil concentrations in biosolids
Pesticides are prevalent in wastewater, yet few studies have measured pesticides in biosolids and aqueous media from samples collected concurrently. Seventeen California wastewater treatment plants (WWTPs) were sampled in May 2020. Biosolids samples were analyzed for 27 analytes, and paired aqueous samples (influent and effluent) were analyzed for 23 analytes. Analytes included fipronil...
Authors
John Wheeler, Gabrielle Pecora Black, Michelle L. Hladik, Corey J. Sanders, Jennifer Teerlink, Luann Wong, Xuyang Zhang, Robert Budd, Thomas M Young