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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Simulation of daily streamflow for nine river basins in eastern Iowa using the Precipitation-Runoff Modeling System Simulation of daily streamflow for nine river basins in eastern Iowa using the Precipitation-Runoff Modeling System
The U.S. Geological Survey, in cooperation with the Iowa Department of Natural Resources, constructed Precipitation-Runoff Modeling System models to estimate daily streamflow for nine river basins in eastern Iowa that drain into the Mississippi River. The models are part of a suite of methods for estimating daily streamflow at ungaged sites. The Precipitation-Runoff Modeling System is a
Authors
Adel E. Haj, Daniel E. Christiansen, Kasey J. Hutchinson
Assessment of Paleozoic shale gas resources in the Sichuan Basin of China, 2015 Assessment of Paleozoic shale gas resources in the Sichuan Basin of China, 2015
Using a geology-based assessment methodology, the U.S. Geological Survey estimated a mean of 23.9 trillion cubic feet of technically recoverable shale gas resources in Paleozoic formations in the Sichuan Basin of China.
Authors
Christopher J. Potter, Christopher J. Schenk, Ronald R. Charpentier, Stephanie B. Gaswirth, Timothy R. Klett, Heidi M. Leathers, Michael E. Brownfield, Tracey J. Mercier, Marilyn E. Tennyson, Janet K. Pitman
Surrogate Analysis and Index Developer (SAID) tool Surrogate Analysis and Index Developer (SAID) tool
The use of acoustic and other parameters as surrogates for suspended-sediment concentrations (SSC) in rivers has been successful in multiple applications across the Nation. Tools to process and evaluate the data are critical to advancing the operational use of surrogates along with the subsequent development of regression models from which real-time sediment concentrations can be made...
Authors
Marian M. Domanski, Timothy D. Straub, Mark N. Landers
Realized detection and capture probabilities for giant gartersnakes (Thamnophis gigas) using modified floating aquatic funnel traps Realized detection and capture probabilities for giant gartersnakes (Thamnophis gigas) using modified floating aquatic funnel traps
Authors
Brian J. Halstead, Shannon M. Skalos, Michael L. Casazza, Glenn D. Wylie
Arctic Alaska’s Lower Cretaceous (Hauterivian and Barremian) mudstone succession—Linking lithofacies, texture, and geochemistry to marine processes Arctic Alaska’s Lower Cretaceous (Hauterivian and Barremian) mudstone succession—Linking lithofacies, texture, and geochemistry to marine processes
We present new images and descriptions of the lithofacies and organic facies of the pebble shale unit and lower part of the Hue Shale (Lower Cretaceous) of Arctic Alaska at a high magnification that illustrates their textural characteristics. Our aims were to describe and determine the distribution of facies in these petroleum source rocks and to identify the processes that formed them...
Authors
Margaret A. Keller, Joe H.S. Macquaker
Pacific blue mussel (Mytilus trossulus) abundance in the Gulf of Alaska: Synthesis of Gulf Watch data (2006-2013) and a consideration of major recruitment events (1989-2013) Pacific blue mussel (Mytilus trossulus) abundance in the Gulf of Alaska: Synthesis of Gulf Watch data (2006-2013) and a consideration of major recruitment events (1989-2013)
Pacific blue mussels (Mytilus trossulus) are abundant and wide-spread primary consumers in the intertidal zone throughout the Gulf of Alaska (GOA). As a component of the Gulf Watch Alaska monitoring program, they represent a key member of intertidal communities and an important prey resource to a number of nearshore vertebrate predators. Our goal is to understand variation in abundance...
Authors
Daniel H. Monson, Thomas Dean, M.R. Lindeberg, James L. Bodkin, Heather A. Coletti, Daniel Esler, Kimberly A. Kloecker, Ben P. Weitzman, Brenda E. Ballachey
Accuracy testing of steel and electric groundwater-level measuring tapes: Test method and in-service tape accuracy Accuracy testing of steel and electric groundwater-level measuring tapes: Test method and in-service tape accuracy
The accuracy of groundwater-level tapes was investigated by developing a tape calibration method and device and testing the accuracy of a sample of groundwater-level tapes with the calibration method and device. The sample of tapes included in-service U.S. Geological Survey (USGS) Water Science Center steel and electric groundwater-level tapes. The tape calibration method developed...
Authors
Janice M. Fulford, Christopher S. Clayton
Dam removal, connectivity, and aquatic resources in the St. Regis River Watershed, New York Dam removal, connectivity, and aquatic resources in the St. Regis River Watershed, New York
The decommissioning and planned removal of the Hogansburg Dam on the St. Regis River in New York has stimulated interest in the potential effects of that barrier removal on the St. Regis watershed. There will be immediate and systemic effects of the Hogansburg Dam removal, which may include inundation of habitats below the dam or dewatering of habitats above the dam, possibly affecting...
Authors
James E. McKenna, Kaitlin Hanak, Katharine DeVilbiss, Anthony David, James H. Johnson
Identifying trout refuges in the Indian and Hudson Rivers in northern New York through airborne thermal infrared remote sensing Identifying trout refuges in the Indian and Hudson Rivers in northern New York through airborne thermal infrared remote sensing
The locations and sizes of potential cold-water refuges for trout were examined in 2005 along a 27-kilometer segment of the Indian and Hudson Rivers in northern New York to evaluate the extent of refuges, the effects of routine flow releases from an impoundment, and how these refuges and releases might influence trout survival in reaches that otherwise would be thermally stressed. This...
Authors
Anne G. Ernst, Barry P. Baldigo, Fred J. Calef, Douglas A. Freehafer, Robert L. Kremens
Archive of bathymetry data collected at Cape Canaveral, Florida, 2014 Archive of bathymetry data collected at Cape Canaveral, Florida, 2014
Remotely sensed, geographically referenced elevation measurements of the sea floor, acquired by boat- and aircraft-based survey systems, were produced by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida, for the area at Cape Canaveral. The work was conducted as part of a study to describe an updated bathymetric dataset collected...
Authors
Mark E. Hansen, Nathaniel G. Plant, David M. Thompson, Rodolfo J. Troche, Christine J. Kranenburg, Emily S. Klipp