California

Filter Total Items: 146
Date published: October 19, 2018
Status: Completed

Simulating Land Subsidence

The California Water Science Center has been involved in multiple studies simulating land subsidence associated with groundwater withdrawal. The simulations can be used to estimate the magnitude, location, and timing of subsidence. They can also be used to evaluate management strategies to mitigate adverse effects from subsidence while also optimizing water availability.

Contacts: Claudia C Faunt
Date published: October 19, 2018
Status: Completed

Using Numerical Models to Simulate Subsidence

The California Water Science Center has been involved in multiple studies simulating land subsidence associated with groundwater withdrawal. The simulations can be used to estimate the magnitude, location, and timing of subsidence. They can also be used to evaluate management strategies to mitigate adverse effects from subsidence while also optimizing water availability.

Contacts: Claudia C Faunt
Date published: October 18, 2018
Status: Completed

Decomposition of Organic Soils in the Sacramento-San Joaquin Delta

The Sacramento-San Joaquin Delta of California was once a great tidal freshwater marsh. It is blanketed by peat and peaty alluvium deposited where streams originating in the Sierra Nevada, Coast Ranges, and South Cascade Range enter San Francisco Bay. In the late 1800s, levees were built along the stream channels, and the land thus protected from flooding was drained, cleared, and planted ('...

Contacts: Michelle Sneed
Date published: October 18, 2018
Status: Completed

Aquifer Compaction due to Groundwater Pumping

Although land subsidence caused by groundwater pumping has caused many negative effects on human civil works for centuries, especially in the highly developed urban or industrialized areas of Europe, the relation between subsidence and groundwater pumpage was not understood or recognized for a long time. Recognition began in 1928 when pioneer researcher O.E. Meinzer of the U.S. Geological...

Contacts: Michelle Sneed
Date published: October 18, 2018
Status: Active

Genomic Mechanisms that Underlie Lack of Recovery of Prince William Sound Herring Following the 1990s Collapse

In the decades following the Exxon Valdez Oil Spill (EVOS), it has become increasingly apparent that oil can be toxic at extremely low concentrations to developing fish embryos including herring, where some toxic phenotypes may be apparent during embryogenesis, but some are delayed until later in life. Therefore, acute and lingering oil may act as an insidious selective force within...

Contacts: Paul Hershberger, Ph.D., Jacob Gregg, Ashley MacKenzie, William Richards, Andrew Whitehead, John Incardona, Nat Scholtz
Date published: October 3, 2018
Status: Active

Implementing New Acoustic Monitoring Techniques in the Trinity River

Accurate river-sediment data is fundamental to planning and managing river restoration efforts on the Trinity River, and throughout the world’s waterways. The USGS has developed a “hydrophone” that enables scientists to listen to sediment particles as they move along the riverbed in order to inexpensively and reliably record near-continuous sediment-bedload-transport data. For this study,...

Date published: October 1, 2018
Status: Active

California Seafloor Mapping Program

The California Seafloor Mapping Program (CSMP) is a cooperative program to create a comprehensive coastal/marine geologic and habitat base map series for all of California's State waters. The California Ocean Protection Council (COPC) authorized funds to establish the CSMP in 2007 (COPC, 2007) and...

Date published: August 30, 2018
Status: Active

Microbial Biogeochemistry Laboratory — Menlo Park, California

About the Laboratory

Microbiologists at the Microbial Biogeochemistry Laboratory develop and apply innovative methods to measure key microbial processes. These methods are used to better understand how major biogeochemical cycles (carbon, nitrogen, sulfur, and iron) interact with and control the speciation and fate of metals like mercury and selenium which can impact...

Date published: August 29, 2018
Status: Active

Bio-Uptake Research Laboratory — Menlo Park, California

 

About the Laboratory

The Bio-Uptake Research Laboratory uses novel stable isotope tracing techniques to assess the bioavailability of inorganic contaminants and characterize the underlying processes governing their bioavailability.

Date published: August 28, 2018
Status: Active

Organic Chemistry Research Laboratory — Sacramento, California

About the Laboratory

Chemists and hydrologists at the Organic Chemistry Research Laboratory (OCRL) develop targeted analytical methods for the quantitation of chemicals that can impact the health of organisms and humans. They have developed methods in a wide variety of environmental media; in addition to water and sediment, they also analyze a variety of tissue matrices...

Date published: August 7, 2018
Status: Active

Seafloor Faults off Southern California

More than 22 million people live along Southern California’s coast, and many more migrate there every year. Faults and earthquake threats in this region have been heavily studied on land. USGS aims to boost our knowledge about faults on the seafloor, so they can be included in hazard assessments.

Contacts: Danny Brothers
Date published: August 5, 2018
Status: Active

Global Hyperspectral Imaging Spectroscopy of Agricultural-Crops & Vegetation (GHISA)

This webpage showcases the key research advances made in hyperspectral remote sensing of agricultural crops and vegetation over the last 50 years. There are three focus areas: