Reports
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
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Bathymetric and velocimetric surveys at highway bridges crossing the Missouri and Mississippi Rivers on the periphery of Missouri, July–August 2018 Bathymetric and velocimetric surveys at highway bridges crossing the Missouri and Mississippi Rivers on the periphery of Missouri, July–August 2018
Bathymetric and velocimetric data were collected by the U.S. Geological Survey, in cooperation with the Missouri Department of Transportation, near 7 bridges at 6 highway crossings of the Missouri and Mississippi Rivers on the periphery of the State of Missouri from July 16 to August 13, 2018. A multibeam echosounder mapping system was used to obtain channel-bed elevations for river...
Authors
Richard J. Huizinga
Multiple-well monitoring site adjacent to the North and South Belridge Oil Fields, Kern County, California Multiple-well monitoring site adjacent to the North and South Belridge Oil Fields, Kern County, California
The U.S. Geological Survey (USGS), in cooperation with the California State Water Resources Control Board, is evaluating several questions about oil and gas development and groundwater resources in California, including (1) the location of groundwater resources; (2) the proximity of oil and gas operations to groundwater and the geologic materials between them; (3) evidence (or no...
Authors
Rhett R. Everett, Anthony A. Brown, Janice M. Gillespie, Adam Kjos, Nicole C. Fenton
Assessment of undiscovered conventional oil and gas resources of Southeast Asia, 2020 Assessment of undiscovered conventional oil and gas resources of Southeast Asia, 2020
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 10.5 billion barrels of oil and 271.5 trillion cubic feet of gas within 33 geologic provinces of Southeast Asia.
Authors
Christopher J. Schenk, Tracey J. Mercier, Cheryl A. Woodall, Thomas M. Finn, Phuong A. Le, Kristen R. Marra, Heidi M. Leathers-Miller, Ronald M. Drake
Assessment of Ambystomatid salamander populations and their breeding habitats in the Delaware Water Gap National Recreation Area Assessment of Ambystomatid salamander populations and their breeding habitats in the Delaware Water Gap National Recreation Area
This report presents abundance and occurrence data for three species of ambystomad salamanders (Ambystoma maculatum, A. jeffersonianum, and A. opacum) collected over a 3-year period (2000, 2001, and 2002) at 200 potentional breeding sies within the Delaware Water Gap National Recreation Area (DEWA). In addition, numerous measures of inpond, near-pond, and landscape attributes were...
Authors
Craig D. Snyder, John A. Young, James T. Julian, Tim L. King, Shanon E. Julian
Landscape and climatic influences on actual evapotranspiration and available water using the Operational Simplified Surface Energy Balance (SSEBop) Model in eastern Bernalillo County, New Mexico, 2015 Landscape and climatic influences on actual evapotranspiration and available water using the Operational Simplified Surface Energy Balance (SSEBop) Model in eastern Bernalillo County, New Mexico, 2015
The U.S. Geological Survey, in cooperation with the Bernalillo County Public Works Division, conducted a 1-year study in 2015 to assess the spatial and temporal distribution of evapotranspiration (ET) and available water within the East Mountain area in Bernalillo County, New Mexico. ET and available water vary spatiotemporally because of complex interactions among environmental factors...
Authors
Kyle R. Douglas-Mankin, Ryan J. McCutcheon, Aurelia C. Mitchell, Gabriel B. Senay
Field comparison of five in situ turbidity sensors Field comparison of five in situ turbidity sensors
Five commercially available turbidity sensors were field tested by the U.S. Geological Survey Hydrologic Instrumentation Facility for accuracy and data comparability. The tested sensors were the Xylem EXO (EXO), the Hach Solitax sc (Solitax), the In Situ Aqua TROLL sensor installed onto a TROLL 600 sonde (TROLL 600), the Campbell Scientific OBS501 (OBS501), and the Observator ANALITE NEP...
Authors
Teri T. Snazelle
Measured and calculated nitrate and dissolved organic carbon concentrations and loads at the W.P. Franklin Lock and Dam, S-79, south Florida, 2014-17 Measured and calculated nitrate and dissolved organic carbon concentrations and loads at the W.P. Franklin Lock and Dam, S-79, south Florida, 2014-17
The U.S. Geological Survey monitored dissolved nitrate plus nitrite as nitrogen (N) and dissolved organic carbon (DOC) concentrations and calculated loads of these constituents at the W.P. Franklin Lock and Dam (S-79) from April 2014 to December 2017. Flows from Lake Okeechobee controlled by S-77, S-78 and S-79 affect water quality in the downstream Caloosahatchee River Estuary, where...
Authors
Amanda Booth
Reducing leaf litter contributions of phosphorus and nitrogen to urban stormwater through municipal leaf collection and street cleaning practices Reducing leaf litter contributions of phosphorus and nitrogen to urban stormwater through municipal leaf collection and street cleaning practices
As the boundaries of urban land use continue to expand, environmental managers are looking for innovative ways to reduce export of nutrients from urban sources. Municipal services such as leaf collection and street cleaning have the potential to reduce nutrient pollution at its source while continuing to offer services valued by residents. This study characterized reductions of total and...
Authors
William R. Selbig, Nicolas H. Buer, Roger T. Bannerman, Phillip Gaebler
Arsenic and uranium occurrence in private wells in Connecticut, 2013–18—A spatially weighted and bedrock geology assessment Arsenic and uranium occurrence in private wells in Connecticut, 2013–18—A spatially weighted and bedrock geology assessment
The U.S. Geological Survey, in cooperation with the Connecticut Department of Public Health, conducted a study to determine the presence of arsenic and uranium in private drinking water wells in Connecticut. Samples were collected during 2013–18 from wells completed in 115 geologic units, with 2,433 samples analyzed for arsenic and 2,191 samples analyzed for uranium. The study concluded...
Authors
Eliza L. Gross, Craig J. Brown
Ungulate migrations of the western United States, Volume 1 Ungulate migrations of the western United States, Volume 1
Across the western United States, many ungulate herds must migrate seasonally to access resources and avoid harsh winter conditions. Because these migration paths cover vast landscapes (in other words migration distances up to 150 miles [241 kilometers]), they are increasingly threatened by roads, fencing, subdivisions, and other development. Over the last decade, many new tracking...
Authors
Matthew Kauffman, Holly Copeland, Jodi Berg, Scott Bergen, Eric K. Cole, Matthew Cuzzocreo, Sarah Dewey, Julien Fattebert, Jeff Gagnon, Emily R. Gelzer, Chris Geremia, Tabitha A. Graves, Kent Hersey, Mark Hurley, Rusty Kaiser, James Meacham, Jerod Merkle, Arthur Middleton, Tristan Nunez, Brendan Oates, Daniel Olson, Lucas Olson, Hall Sawyer, Cody Schroeder, Scott Sprague, Alethea Steingisser, Mark Thonhoff
2018 Kaua'i forest bird population estimates and trends 2018 Kaua'i forest bird population estimates and trends
Kaua‘i's native forest birds have experienced steep declines since the beginning of systematic surveys in 1981, and declines have accelerated in recent decades. This report details the analysis of the most recent surveys conducted in 2018. Incorporating the new survey results, long-term trends continue to show sharp declines for all native honeycreeper species with the exception of...
Authors
Eben H. Paxton, Kevin W. Brinck, Lisa H. Crampton, Justin Hite, Maria Costantini
Quality assurance/quality control procedure for New Jersey’s water-use data for the New Jersey Water Transfer Data System (NJWaTr) Quality assurance/quality control procedure for New Jersey’s water-use data for the New Jersey Water Transfer Data System (NJWaTr)
This report is an instructional reference document that describes methods developed and used by the U.S. Geological Survey (USGS) New Jersey Water Science Center (NJWSC) to assure the quality and completeness of water-use data as provided by the New Jersey Department of Environmental Protection (NJDEP) Bureau of Water Allocation. These data are owned wholly by the State of New Jersey...
Authors
Jennifer L. Shourds