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Reports

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.

Filter Total Items: 84733

Ecological effects of pinyon-juniper removal in the Western United States—A synthesis of scientific research, January 2014–March 2021 Ecological effects of pinyon-juniper removal in the Western United States—A synthesis of scientific research, January 2014–March 2021

Executive Summary Increasing density of pinyon (Pinus spp.) and juniper (Juniperus spp.) woodlands (hereinafter “pinyon-juniper”), as well as expansion of these woodlands into adjacent shrublands and grasslands, has altered ecosystem function and wildlife habitat across large areas of the interior western United States. Although there are many natural and human-caused drivers of woodland...
Authors
Douglas J. Shinneman, Susan K. McIlroy, Sharon A Poessel, Rosemary L. Downing, Tracey N. Johnson, Aaron C. Young, Todd E. Katzner

Simulation of future streamflow and irrigation demand based on climate and urban growth projections in the Cape Fear and Pee Dee River Basins, North Carolina and South Carolina, 2055–65 Simulation of future streamflow and irrigation demand based on climate and urban growth projections in the Cape Fear and Pee Dee River Basins, North Carolina and South Carolina, 2055–65

Water resources in the coastal region of North Carolina and South Carolina (Coastal Carolinas) are currently under stress from competing ecological and societal needs. Projected changes in climate and population are expected to place even more stress on water resources in the region. The Coastal Carolinas Focus Area Study was initiated by the U.S. Geological Survey Water Availability and...
Authors
Laura N. Gurley, Ana Maria Garcia, Cassandra A. Pfeifle, Georgina M. Sanchez

Age-0 sablefish size and growth indices from seabird diets at Middleton Island, Gulf of Alaska Age-0 sablefish size and growth indices from seabird diets at Middleton Island, Gulf of Alaska

Sablefish (Anoplopoma fimbria) is a commercially valuable groundfish species in Alaska, with the population assessed annually by the National Oceanic and Atmospheric Administration Alaska Fisheries Science Center. Sablefish recruit into the commercially fished population at 2 years old and are poorly sampled by most surveys before that age. However, information on the abundance...
Authors
Mayumi L. Arimitsu, Scott A. Hatch

Pollinator conservation and climate science at the U.S. Geological Survey Pollinator conservation and climate science at the U.S. Geological Survey

Introduction Ecosystems—whether agricultural, urban, or natural—depend on pollinators, great and small. Pollinators in the form of bees, birds, butterflies, bats, and even moths provide vital, but often invisible services, from contributing to biodiverse terrestrial wildlife and plant communities to supporting healthy watersheds. Pollinator declines worldwide have been noted as land-use...
Authors
Elise R. Irwin, Jonathan R. Mawdsley

A century of hydrologic data collection prepares western Long Island for current and future water-resources challenges A century of hydrologic data collection prepares western Long Island for current and future water-resources challenges

Freshwater is a vital natural resource. New York is a water-rich State; however, even here, the economical use of water resources is needed to ensure there is enough water of adequate quality for human and ecological needs—now and into the future. Nowhere in New York is this more evident than on Long Island where public-water supply is obtained from the sole-source aquifers directly...
Authors
Robert F. Breault, John P. Masterson, Ronald Busciolano, Irene Fisher

Northwest Forest Plan — The first 25 years (1994–2018): Watershed condition status and trends Northwest Forest Plan — The first 25 years (1994–2018): Watershed condition status and trends

This report describes status and trends in watershed condition across the Northwest Forest Plan (NWFP) area over the first 25 years since its inception in 1994. The program charged with this task is the Aquatic and Riparian Effectiveness Monitoring Program (AREMP), which has assembled information from field data collection, spatial datasets, and a host of landscape models to evaluate the...
Authors
Jason Dunham, Christine Hirsch, Sean Gordon, Rebecca L. Flitcroft, Nathan Chelgren, Marcia N. Snyder, David P Hockman-Wert, Gordon H. Reeves, Heidi V. Andersen, Scott K. Anderson, William A. Battaglin, Tom A. Black, Jason Brown, Shannon Claeson, Lauren Hay, Emily D. Heaston, Charles H. Luce, Nathan Nelson, Colin Penn, Mark Raggon

A comprehensive plan for in-water sea turtle data collection in the US Gulf of Mexico A comprehensive plan for in-water sea turtle data collection in the US Gulf of Mexico

The Deepwater Horizon Open Ocean Trustee Implementation Group (OO TIG) released a Final Open Ocean Restoration Plan 2 in 2019, which included a project titled Developing a Gulf-wide Comprehensive Plan for In-water Sea Turtle Data Collection. This document, A Comprehensive Plan for In-water Sea Turtle Data Collection in the US Gulf of Mexico (Plan), is the culmination of that OO TIG...
Authors
Kristen Hart, Pamela T. Plotkin, Christopher Sasso, Blair E. Witherington

Nutrient and suspended-sediment concentrations, flux, and yields in the Galena River, Illinois, 2019–21 Nutrient and suspended-sediment concentrations, flux, and yields in the Galena River, Illinois, 2019–21

Two stations on the Galena River in Illinois were monitored for nitrogen, phosphorus, and suspended sediment from 2019 to 2021 to determine physiochemical properties and constituent concentrations, flux, and yields. This information could aide in the management and understanding of the Galena River and the contributions from the intervening 58-square-mile study area watershed...
Authors
Paul J. Terrio, Luis A. Garcia

Floodwater drainage assessment of Offutt Air Force Base, Nebraska, 2020–22 Floodwater drainage assessment of Offutt Air Force Base, Nebraska, 2020–22

Offutt Air Force Base, south of Omaha, Nebraska, experienced major flooding during the March 2019 flood event because of the proximity of the base to the confluence of the Missouri River and nearby tributaries, which exceeded flood stages. Postflood, standing water remained through much of the year, attracting waterfowl and other birds and posing a major safety risk to aircraft. The U.S
Authors
Christopher M. Hobza, Kellan R. Strauch

The 3D Elevation Program—Supporting Arkansas's economy The 3D Elevation Program—Supporting Arkansas's economy

Introduction In recent years, Arkansas has coordinated with Federal and local partners to improve the quality and availability of high-resolution elevation data for the State. With high-quality elevation data, Arkansas can improve services offered to the public and within government, resulting in better quality of life, improved public safety, and higher return on investments. Elevation...
Authors
Chris Cretini

Hydrogeology of sand and gravel aquifers in the Owasco Inlet watershed, Cayuga and Tompkins Counties, New York Hydrogeology of sand and gravel aquifers in the Owasco Inlet watershed, Cayuga and Tompkins Counties, New York

This study is a continuation of a series of hydrogeologic appraisals that have been conducted since 1980, as part of a cooperative, long-term, detailed aquifer mapping program by the U.S. Geological Survey and the New York State Department of Environmental Conservation. These appraisals provide a foundation for wellhead protection programs, water-resource management and planning...
Authors
Paul M. Heisig

Quality of surface water in Missouri, water year 2021 Quality of surface water in Missouri, water year 2021

The U.S. Geological Survey, in cooperation with the Missouri Department of Natural Resources, maintains a statewide group of stations known as the Ambient Water-Quality Monitoring Network, which includes selected streams and springs in Missouri. During water year 2021 (October 1, 2020, through September 30, 2021), the U.S. Geological Survey collected water-quality data at 72 stations: 70...
Authors
Kendra M. Markland
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