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Filter Total Items: 2,602
Thermal Indices Innovation Thumb
Date Published: November 15, 2018
Status: Active

Thermal Indices Innovation Project

The presence of an interconnected organic nano-porosity network has emerged as an important control on reservoir permeability and hydrocarbon storage space in shale petroleum systems. Application of SEM techniques to Ar ion-milled rock surfaces has become standard industry practice for identification of organic pore systems and mudstone reservoir characterization. There is general consensus...

proposed locations in the Delta region
Date Published: November 15, 2018
Status: Active

Delta Regional Monitoring Program: Current-use Pesticides

This study will utilize the unique analytical capabilities of the USGS Pesticide Fate Research Group (PFRG), Organic Chemistry Research Laboratory (OCRL) to assess the occurrence of a large suite of understudied, current-use pesticides and pesticide degradates in surface waters entering the Sacramento/San Joaquin Delta. 

Contacts: James Orlando
landslide monitoring equipment inside small fence on grassy slope
Date Published: November 15, 2018
Status: Active

San Francisco Bay Area - East Bay (BALT1) Site near Castro Valley, CA

Recent Conditions

The instruments for this site were installed in the spring of 2009 and are used to monitor and detect changes in local conditions.  Soil water content and ground water pressure are monitored at two nests on the same hillslope.  Data for the site include:

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Contacts: Brian Collins
    Map of current and proposed USGS optical continuous monitoring sites in the Northern Delta
Date Published: November 15, 2018
Status: Completed

Assessment of Baseline Conditions in Liberty Cut

Monitoring habitat quality in the San Francisco Estuary (SFE) and Sacramento-San Joaquin Delta has been limited to mostly monthly discrete measurements of biologically relevant parameters (e.g. phytoplankton, dissolved organic matter (DOM), nutrients) that cannot fully characterize the physical and biogeochemical variability.

Contacts: Bryan Downing
Location and general features of the Santa Barbara and the Foothill groundwater basins, Santa Barbara, California.
Date Published: November 15, 2018
Status: Completed

Optimal Groundwater Sustainability, Santa Barbara, California

Prior to 1997, local surface water and groundwater supplied all of the water supply for the city of Santa Barbara (about 120 miles northwest of Los Angeles). Excess pumping of groundwater during times of drought resulted in saltwater intrusion in Storage Unit I of the Santa Barbara groundwater basin. 

Contacts: Tracy Nishikawa
Hydrous Pyrolysis Kerogen Thumb
Date Published: November 15, 2018
Status: Active

Hydrous Pyrolysis and Kerogen Conversion

Vitrinite suppression/retardation, and the misidentification of solid bitumen as vitrinite, can lead to large variance in measurements of reflectance, cause trends with respect to depth that are difficult to explain by any known geologic phenomena, and cause problems in evaluation of thermal histories and timing of petroleum generation. Accordingly, experimental identification and...

Contacts: Paul C Hackley
Maps showing Cache Creek watershed
Date Published: November 15, 2018
Status: Active

Evaluating coagulation techniques to reduce the transport of Hg from mine-affected and active geothermal Hg-source watersheds

Our objective is to determine the effectiveness of coagulation and adsorption techniques in removing mercury from contaminated surface waters of the Cache Creek watershed.

Contacts: Jacob A Fleck
Conceptual diagram of zooplankton production
Date Published: November 15, 2018
Status: Active

Dynamics of zooplankton in the Cache Slough Complex

Our purpose is to investigate what controls the distribution and abundance of fish prey within the Cache Slough Complex (CSC).

Standardization Thumb
Date Published: November 15, 2018
Status: Active

Standardization of Petrographic Measurements

Advent of the "shale revolution" since about 2005 has caused increased demand for reliable petrographic measurements of thermal maturity in shale via vitrinite reflectance, long considered the "gold standard" approach (Hackley et al., 2015). A standardized methodology for organic reflectance measurement in shale first became available in 2011 (ASTM, 2016), based on prior work by task members....

Contacts: Paul C Hackley
Map showing the Liberty Island study site
Date Published: November 14, 2018
Status: Completed

Phytoplankton production and nutrient transformations in shallow water wetland habitats

The objectives of this study are to quantify and characterize (1) phytoplankton production on Liberty Island, (2) utilization and transformation of nutrients, and (3) attenuation/loss of phytoplankton as the material is transported from Liberty Iisland into Cache Slough.

USGS
Date Published: November 14, 2018
Status: Active

Assessment of methyl mercury (MeHg) release from sediment formed in wetland treatment cells designed to remove mercury from surface waters using in situ coagulation

Our objective is to determine the relative propensity of sediment material formed under two different in situ coagulation treatments (iron sulfate, polyaluminum chloride) to release MeHg into surface waters under environmentally relevant conditions that may affect flocculant stability and MeHg production rates.

Contacts: Jacob A Fleck
map of California showing the GAMA province boundaries
Date Published: November 14, 2018
Status: Completed

Decadal-scale water-quality trends in California's public-supply aquifers: Pilot study in two priority basins

This project will contribute to the USGS Strategic Science Plan objective of developing a Water Census to inform decision-makers and the public about the status of groundwater resources and how they are changing, and forecasts of future changes in groundwater quality, and supports the Cooperative Water Program priority of assessing the quality of drinking water supplies for the protection of...

Contacts: Miranda Fram
Filter Total Items: 621
USGS
January 1, 2016

Transient electromagnetic (TEM) soundings were made in the San Luis Valley, Colorado, to map the location of a blue clay unit as well as to investigate the presence of suspected faults. A total of 147 soundings were made near and in Great Sand Dunes National Park and Preserve, and an additional 6 soundings were made near Hansen Bluff on the eastern edge of the Alamosa National Wildlife

USGS
January 1, 2016

This part of the data release presents bathymetry data from the Elwha River delta collected in January 2015 using two personal watercraft (PWCs). The PWCs were equipped with single-beam echosounders and survey-grade global navigation satellite system (GNSS) receivers.

USGS
January 1, 2016

Water depths were measured during November 2015 and bathymetric elevations were computed for the lower Sixmile Creek reservoir in Ithaca, Tompkins County, N.Y. These data include ADCP-measured transect data and manually-measured point data collected by the U.S. Geological Survey, Ithaca, N.Y., during November 16-20, 2015. These data were used by the GIS Program, City of Ithaca, N.

Large map at top shows the study area bathymetry, four smaller maps below show the detail at locations from larger map.
December 30, 2015

High-resolution swath bathymetry and backscatter were collected in the mouth of the Columbia River (MCR) as part of the Office of Naval Research (ONR) funded River and Inlet Dynamics Experiment in 2013. The goal of the U.S. Geological Survey’s component of the research was to evaluate the various hydrodynamic and sediment transport processes in the Columbia River estuary entrance using

April 1, 2014 ground-based lidar beach survey extents
September 9, 2015

his high-resolution elevation dataset was collected on April 1, 2014, and is part of the USGS's ongoing beach monitoring effort under Hurricane Sandy Supplemental Project GS2-2B.  This USGS Data Release includes the resulting processed elevation point data (xyz) and an interpolated digital elevation model (DEM). 

USGS
January 1, 2015

This Data Release contains data from the USGS survey of the Oregon OCS Floating Wind Farm Site in 2014. The shaded-relief raster was generated from bathymetry data collected by USGS during the period from August 20 to September 1, 2014. using a Reson 7111 multibeam echosounder. The mapping mission collected bathymetry data from about 163 m to 566 m depths on the Oregon outer continental shelf.

USGS
January 1, 2015

This part of the USGS data release presents acoustic backscatter data for the Columbia River Mouth, Oregon and Washington. The acoustic backscatter data of the Columbia River Mouth, Oregon and Washington were collected by the U.S. Geological Survey (USGS). Mapping was completed in 2013, using a 234-kHz SEA SWATHPlus interferometric system. These data are not intended for navigational pu

USGS
January 1, 2015

This part of the USGS data release presents bathymetry data for the Columbia River Mouth, Oregon and Washington. The bathymetry data of the Columbia River Mouth, Oregon and Washington were collected by the U.S. Geological Survey (USGS). Mapping was completed in 2013, using a 234-kHz SEA SWATHPlus interferometric system. These data are not intended for navigational purposes.

Water-supply basins in California that drain to the SF Bay Delta
February 26, 2014

Soil water deficit was calculated from soil moisture storage simulated for Jan. 1, 2014 for 23 water-supply basins surrounding the California Central Valley that drain to the Bay-Delta by using the monthly California Basin Characterization Model and ArcGIS. 

Filter Total Items: 4,983
Investigating Lung Disease in Military Veterans
November 10, 2017

Six years ago, veterans returning from Iraq and Afghanistan had trouble breathing normally. The list of potential causes that soldiers were exposed to seemed endless: smoke from burn pits used for trash disposal, desert dust, diesel generator exhaust, humidity and temperature extremes, explosives, and city trash and sewage.

Amidst steam created by rain falling on the hot lava, another HVO g...
November 9, 2017

Scientists at the USGS Hawaiian Volcano Observatory routinely collect lava samples from Kīlauea and use the chemistry of these samples to infer the temperature of magma (molten rock below Earth's surface).

Distant view of sandy yellow beach stretching from bottom left to upper right of photo.
November 8, 2017

Coastal communities count on beaches for recreation and for protection from large waves, but beaches are vulnerable to threats such as erosion by storms and flooding. Whether beaches grow, shrink, or even disappear depends in part on what happens just offshore. How do features like shifting sandbars affect waves, currents, and the movement of sand from the beach to offshore and back?

A USGS hydrologic technician examines a wall in Puerto Rico for a high-water mark after flooding from Hurricane Maria.
November 8, 2017

U.S. Geological Survey field crews in Puerto Rico are rapidly repairing the damage wrought by Hurricanes Irma and Maria, tracking the scope of storm floods, and documenting the new contours of rivers re-sculpted by floodwaters and mountains re-shaped by landslides.

Artist concept of Landsat 8
November 8, 2017

Monitoring our changing planet is critical to supporting a world population expected to reach eight billion by 2025. Observing the Earth from space offers unprecedented levels of data and a holistic view, which enables scientists to detect the most critical trends in natural resource conditions at local and global scales.

Filtering water for eDNA sample collection in Yellowstone National Park between Lewis and Shoshone Lakes.
November 6, 2017

Western waters support some of the most intact aquatic ecosystems in North America, yet invasive species and emerging infectious diseases pose significant and immediate threats to these ecosystems. 

3D map of Mud Creek slide derived from video footage collected by drone on October 12, 2017.
November 6, 2017

On October 12, USGS drones collected video footage of the Mud Creek landslide, which buried California State Highway 1 under a third-of-a-mile-wide mass of rock and dirt on May 20.

USGS air photo of the Mud Creek landslide, taken on May 27, 2017
November 1, 2017

On May 20, 2017, more than 2 million cubic meters of rock and dirt—enough to fill a line of dump trucks nearly a thousand miles long—collapsed down the steep slopes at Mud Creek on California’s Big Sur coast, about 140 miles south of San Francisco. A pile of rubble almost a third of a mile wide buried California State Highway 1 over 65 feet deep and added about 13 acres of new land to the coast.

A muddy river in the background flows into a clear river in the foreground.
November 1, 2017

TACOMA, Wash. — The U.S. Geological Survey recently published the results of a new five-year suspended-sediment and water temperature study from the Sauk River. The purpose of this study is to improve understanding of the magnitude and timing of suspended sediment from the Sauk River and its tributaries to the Skagit River.

Barley Prize
October 26, 2017

USGS Leetown Science Center places 3rd in the second round of the International Barley Water Competition! This qualifies LSC as one of only 10 finalists for the last round of contenders.  The last round involves a test of phosphorus removal and the top four teams receive $200,000 each.   https://www.wateronline.com/doc/top-contenders-named-in-m-george-barley-water-prize-0001

Image shows coal being loaded into trucks at a coal mine
October 26, 2017

It is difficult to overstate the importance of energy to the American economy.  Managing this vital sector depends on knowing how many energy resources we have, how many we use and need, and how these resources are transported