Reports
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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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Ground deformation and gravity for volcano monitoring Ground deformation and gravity for volcano monitoring
Authors
Emily K. Montgomery-Brown, Kyle R. Anderson, Ingrid A. Johanson, Michael P. Poland, Ashton F. Flinders
Infrasound for volcano monitoring Infrasound for volcano monitoring
20 hertz [Hz]), but the most energetic band is typically in the infrasound from 0.5 to 20 Hz. Studies of volcanic infrasound and the deployment of infrasound for volcano monitoring have increased rapidly in the past two decades as sensors have improved and as analytical tools have become more widely available. Improved sensors and tools have led to a growing diversity of eruptive...
Authors
John J. Lyons, David Fee, Weston A. Thelen, Alexandra M. Iezzi, Aaron G. Wech
Recommended capabilities and instrumentation for volcano monitoring in the United States Recommended capabilities and instrumentation for volcano monitoring in the United States
The National Volcano Early Warning System (NVEWS) was authorized and partially funded by the U.S. Government in 2019. In response, the U.S. Geological Survey (USGS) Volcano Hazards Program asked its scientists to reflect on and summarize their views of best practices for volcano monitoring. The goal was to review and update the recommendations of a previous report (Moran and others, 2008...
A data exchange standard for wadeable stream habitat monitoring data A data exchange standard for wadeable stream habitat monitoring data
Data from wadeable streams collected by monitoring programs are used to assess watershed condition status and trends. Federally managed programs collect a suite of similar habitat measurements using compatible methods and produce individual program datasets for their prescribed geographic and temporal range. We identified four programs that produce similar data: the Bureau of Land...
Authors
Rebecca A. Scully, Erin K. Dlabola, Jennifer M. Bayer, Emily Heaston, Jennifer Courtwright, Marcia N. Snyder, David Hockman-Wert, W. Carl Saunders, Karen A. Blocksom, Christine Hirsch, Scott W. Miller
Quantifying fine sediment infiltration in spawning gravel used by Chinook salmon (Oncorhynchus tshawytscha) in the Sauk River Basin, Washington, 2018–21 Quantifying fine sediment infiltration in spawning gravel used by Chinook salmon (Oncorhynchus tshawytscha) in the Sauk River Basin, Washington, 2018–21
Fine sediment can infiltrate into river substrate that salmonid fish species (Oncorhynchus spp.) use to spawn. High levels of sediment infiltration can increase egg-to-fry mortality, which corresponds to the period when salmonids are still residing in the subsurface gravels. This study quantifies fine sediment infiltration of Chinook salmon (Oncorhynchus tshawytscha) spawning habitat...
Authors
Kristin L. Jaeger, Scott W. Anderson, Anya C. Leach, Scott T. Morris
Understanding and forecasting potential recruitment of Lake Michigan fishes by modeling growth and survival of larval stages with coupled climate, biophysical, and bioenergetics models Understanding and forecasting potential recruitment of Lake Michigan fishes by modeling growth and survival of larval stages with coupled climate, biophysical, and bioenergetics models
Individual adult fish can produce huge numbers of small offspring, but most die in the first weeks of life. Environmental changes that lead to even small changes in early life survival can have a disproportionate impact on the number of fish that survive and ultimately support fisheries. Lake Michigan supports valuable recreational and commercial fisheries that can fluctuate with how...
Authors
David B. Bunnell, Tomas O. Hook, Spencer T. Gardner, Pengfei Xue, Xing Zhou, Paris D. Collingsworth, Edward S. Rutherford, Mark P. Rowe, Peter Alsip
Comparison of water quality in shallow groundwater near agricultural areas in the Delaware Coastal Plain, 2014 and 2019 Comparison of water quality in shallow groundwater near agricultural areas in the Delaware Coastal Plain, 2014 and 2019
The State of Delaware has encouraged agricultural conservation practices to improve nutrient uptake by crops and mitigate nutrient transport to groundwater in the surficial aquifer. To study recent changes in groundwater quality, the U.S. Geological Survey and the Delaware Department of Agriculture (DDA) developed a network of shallow wells near agricultural areas throughout the Delaware...
Authors
Alexander M. Soroka, Betzaida Reyes, Brandon J. Fleming, Michael Brownley
Bison Shared Stewardship Strategy Bison Shared Stewardship Strategy
No abstract available.
Authors
Jason Baldes, Linda Cardenas, Gerald Cobbell, Wayne Frederick, Christina Justice, Ted Knife, Robert Magnan, Thomas Mendez, Brendan Moynahan, Paul Santavy, Kathryn A. Schoenecker, Brandon Small, Thomas Swecichowski
Appendix D-4: USGS water resource investigations and activities Appendix D-4: USGS water resource investigations and activities
No abstract available.
Authors
Daniel C. Thomas
Special flora and vegetation of Indiana Dunes National Park Special flora and vegetation of Indiana Dunes National Park
No abstract available.
Authors
Noel B. Pavlovic, Barbara Plampin, Gayle S. Tonkovich, David R. Hamilla
Evaluation of the lakes and impoundments drought index for the Massachusetts Drought Management Plan Evaluation of the lakes and impoundments drought index for the Massachusetts Drought Management Plan
The condition of surface water storage in lakes and impoundments is used as an index of drought in the Massachusetts drought management plan. The U.S. Geological Survey visited 28 of these lakes and impoundments at 14 single and multiple waterbody systems to evaluate their appropriateness for characterizing drought. The data collection and computation methods at each system were then...
Authors
Travis L. Smith
Statistical analysis of Lake Tahoe secchi depth data Statistical analysis of Lake Tahoe secchi depth data
Secchi depth measurements in Lake Tahoe have been collected at a Long-Term Profile (LTP) monitoring site since 1968. Periodic updates in Secchi trend analysis are needed to understand changes in the long-term record, changes in seasonal pattern, and to provide insight into the progress of restoration efforts in improving lake clarity. As such, this analysis is intended to evaluate the...
Authors
Ramon C. Naranjo