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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Laboratory for Infectious Disease and the Environment (LIDE) Laboratory for Infectious Disease and the Environment (LIDE)
The Laboratory for Infectious Disease and the Environment (LIDE) studies the occurrence, fate and transport, and health effects of human and agricultural zoonotic pathogens in the environment. The LIDE is an interagency collaborative effort between the U.S. Geological Survey and the U.S. Department of Agriculture-Agricultural Research Service that conducts research to inform decision...
Authors
Joel P. Stokdyk, Jennifer L. Bruce, Tucker R. Burch, Susan K. Spencer, Aaron D. Firnstahl, Mark A. Borchardt
Tampa Bay Ocean and Coastal Acidification Monitoring Quality Assurance Project Plan Tampa Bay Ocean and Coastal Acidification Monitoring Quality Assurance Project Plan
Coastal acidification caused by eutrophication, freshwater inflow, and upwelling is already affecting many estuaries worldwide and can be exacerbated by ocean acidification that is caused by increasing carbon dioxide in the atmosphere. Effective management, mitigation, and (or) adaptation to the effects of coastal and ocean acidification require careful monitoring of the resulting...
Authors
Kimberly K. Yates, Christopher S. Moore, Nathan H. Goldstein, Edward T. Sherwood
Status and trends of prey fish populations in Lake Michigan, 2018 Status and trends of prey fish populations in Lake Michigan, 2018
The U.S. Geological Survey Great Lakes Science Center has conducted lake-wide surveys of the fish community in Lake Michigan each fall since 1973 using standard 12 m bottom trawls towed along contour at depths of 9 to 110 m at each of seven index transects. The survey provides relative abundance and biomass estimates between the 5 m and 114 m depth contours of the lake for prey fish...
Authors
David B. Bunnell, Charles P. Madenjian, Timothy J. Desorcie, Patricia Dieter, Jean V. Adams
Undocumented late 18th- to early 19th-century volcanic eruptions in the Southwest Rift Zone of Kīlauea Volcano, Hawai‘i Undocumented late 18th- to early 19th-century volcanic eruptions in the Southwest Rift Zone of Kīlauea Volcano, Hawai‘i
The historical record of volcanic activity at Kīlauea Volcano on the Island of Hawaiʻi begins with the phreatomagmatic blasts of 1790. Three decades later, in 1823, the first party of non-Hawaiian visitors, organized by the English Reverend William Ellis, reached Kīlauea’s summit. A detailed narrative by Ellis includes an account of an eruption in Kīlauea’s Southwest Rift Zone that...
Authors
Richard W. Hazlett, Tim R. Orr, Steve P. Lundblad
Southern sea otter (Enhydra lutris nereis) population biology at Big Sur and Monterey, California --Investigating the consequences of resource abundance and anthropogenic stressors for sea otter recovery Southern sea otter (Enhydra lutris nereis) population biology at Big Sur and Monterey, California --Investigating the consequences of resource abundance and anthropogenic stressors for sea otter recovery
The range of the southern sea otter (Enhydra lutris nereis) spans most of the central California coast from Half Moon Bay to Gaviota. Some coastal areas within this range are heavily developed and highly impacted by humans, while other areas are wild and largely pristine. Determining the relative importance of food resource abundance, environmental conditions, and anthropogenic increases...
Authors
M. Tim Tinker, Joseph A. Tomoleoni, Benjamin P. Weitzman, Michelle Staedler, Dave Jessup, Michael J. Murray, Melissa Miller, Tristan Burgess, Lizabeth Bowen, A. Keith Miles, Nicole Thometz, Lily Tarjan, Emily Golson, Francesca Batac, Erin Dodd, Eva Berberich, Jessica Kunz, Gena Bentall, Jessica Fujii, Teri Nicholson, Seth Newsome, Ann Melli, Nicole LaRoche, Holly MacCormick, Andy Johnson, Laird Henkel, Chris Kreuder-Johnson, Pat Conrad
Hydraulic conductivity estimates from slug tests in the Big Sioux aquifer near Sioux Falls, South Dakota Hydraulic conductivity estimates from slug tests in the Big Sioux aquifer near Sioux Falls, South Dakota
Hydraulic conductivity estimates were made for 15 observation wells using slug-out (rising-head) tests in the Big Sioux aquifer near Sioux Falls, South Dakota, as part of a cooperative study with the City of Sioux Falls to characterize the hydrogeology and the extent of the Big Sioux aquifer north of the city. Well and aquifer data were collected from field measurements and drillers’...
Authors
William G. Eldridge, Colton J. Medler
Regression models for estimating sediment and nutrient concentrations and loads at the Kankakee River, Shelby, Indiana, December 2015 through May 2018 Regression models for estimating sediment and nutrient concentrations and loads at the Kankakee River, Shelby, Indiana, December 2015 through May 2018
The Kankakee River in northern Indiana flows through the area once known as the Grand Marsh. Beginning in the 1860s, anthropogenic changes to the river within Indiana resulted in downstream flooding and additional transport of sediment and nutrients. In 2015, the U.S. Geological Survey, in cooperation with the Indiana Department of Environmental Management, upgraded the gaging station...
Authors
Timothy R. Lathrop, Aubrey R. Bunch, Myles S. Downhour
User’s manual for the Draper climate-distribution software suite with data‑evaluation tools User’s manual for the Draper climate-distribution software suite with data‑evaluation tools
Development of a time series of spatially distributed climate data is an important step in the process of developing physically based environmental models requiring distributed inputs of climate data beyond what is available from observations collected at climate stations. To prepare inputs required for model-mapping units across the study area, climate data (temperature and...
Authors
John M. Donovan, Kathryn M. Koczot
Quality of surface water in Missouri, water year 2017 Quality of surface water in Missouri, water year 2017
The U.S. Geological Survey, in cooperation with the Missouri Department of Natural Resources, designed and operates a network of monitoring stations on streams and springs throughout Missouri known as the Ambient Water-Quality Monitoring Network. During water year 2017 (October 1, 2016, through September 30, 2017), data presented in this report were collected at 72 stations: 70 Ambient...
Authors
Miya N. Barr, Katherine A. Bartels
The Missouri groundwater-level observation network The Missouri groundwater-level observation network
The Missouri groundwater-level observation well network is a series of wells across the State of Missouri in which groundwater levels are monitored in real time and periodically. The wells monitor the water levels in multiple key aquifers, such as the Ozark aquifer in the Salem and Springfield Plateaus and the Mississippi Alluvial Plain aquifer in the South-eastern Lowlands. As of 2018...
Authors
David C. Smith
Biogeochemical and physical processes controlling mercury methylation and bioaccumulation in Lake Powell, Glen Canyon National Recreation Area, Utah and Arizona, 2014 and 2015 Biogeochemical and physical processes controlling mercury methylation and bioaccumulation in Lake Powell, Glen Canyon National Recreation Area, Utah and Arizona, 2014 and 2015
Mercury monitoring results from about 300 Morone saxatilis (striped bass) muscle tissue samples collected by the State of Utah from Lake Powell resulted in a Utah/Arizona fish consumption advisory issued in 2012 for approximately the lower 100 kilometers of the reservoir. Chemical, physical, and biological data were collected during two synoptic sampling cruises on Lake Powell during May...
Authors
David L. Naftz, Mark Marvin-DiPasquale, David P. Krabbenhoft, George Aiken, Eric S. Boyd, Christopher H. Conaway, Jacob M. Ogorek, Gregory M. Anderson
Hawaiian hoary bat acoustic monitoring on U.S. Army O`ahu facilities Hawaiian hoary bat acoustic monitoring on U.S. Army O`ahu facilities
Acoustic sampling for occurrence of the endangered Hawaiian hoary bat (Lasiurus cinereus semotus) was conducted at 12 locations on U. S. Army installations on O‘ahu Island, Hawai‘i. Bats were confirmed as present at 10 of these locations: Dillingham Military Reservation, Helemano Military Reservation, Kahuku Training Area, Kawailoa Training Area, Mākua Military Reservation, Schofield...
Authors
Frank Bonaccorso, Kristina Montoya-Aiona, Corinna A. Pinzari