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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Beaver dam analogs as nature-based solutions to mitigate snowpack loss in northern New Mexico Beaver dam analogs as nature-based solutions to mitigate snowpack loss in northern New Mexico
Reductions in snow have left many streams in northern New Mexico dry or with very low flows during the summer. Base flow, defined as the contribution of groundwater to streamflow, can sustain streamflow during the summer and during drought conditions. Beaver dam analogs can be used to “slow the flow,” or increase the infiltration of rain-based runoff to replenish shallow groundwater...
Authors
David Moeser, Benjamin Linhoff, Justin Nichols, Jake Kurzweil
The electric vehicle “EV”-crane—A next-generation system for fluvial sediment and water-quality sampling using an electric cart with integrated crane and accessories The electric vehicle “EV”-crane—A next-generation system for fluvial sediment and water-quality sampling using an electric cart with integrated crane and accessories
The U.S. Geological Survey (USGS), with support from the Federal Interagency Sedimentation Project (FISP), developed the electric vehicle (EV)-crane, a modified electric cart equipped with a rigid swivel-mounted crane and integrated accessory holders. The EV-crane was developed to improve the efficiency and safety of fluvial sediment and water-quality sampling from bridges. USGS field...
Authors
Joel T. Groten, J. William Lund, David J. Brannon
Simulation of groundwater flow in the Silurian aquifer, eastern Iowa, 2020–45 Simulation of groundwater flow in the Silurian aquifer, eastern Iowa, 2020–45
The Silurian aquifer is an important water source for municipalities, industry, and rural households and communities in eastern Iowa, including Johnson County. Increasing demand for groundwater from the aquifer indicated that analytical tools may be beneficial to quantify groundwater resources and inform water-management decisions for the aquifer. The U.S. Geological Survey, in...
Authors
Emilia L. Bristow, John M. Gannon, Andrew M. Williams
The surface elevation table and marker horizon technique: A protocol for monitoring wetland elevation dynamics, standard pperating procedures (version 2) The surface elevation table and marker horizon technique: A protocol for monitoring wetland elevation dynamics, standard pperating procedures (version 2)
No abstract available.
Authors
James C. Lynch, Philippe Hensel, Donald R. Cahoon
Resurvey of cross sections on the Green River in Browns Park, Colorado and Utah Resurvey of cross sections on the Green River in Browns Park, Colorado and Utah
This study resurveyed ten previously established cross sections and established eight new cross sections on the Green River in Browns Park to document changes in channel width, depth, and area since earlier surveys conducted in 1994. The measured area of the channel cross sections on the Green River in Browns Park generally increased between the initial surveys and 2019. This increase in...
Authors
Ronald E. Griffiths, David J. Topping, Joel A. Unema, Keith A. Kohl
2026–2031 U.S. Geological Survey strategy for a hazard ready Nation—Actionable science for risk reduction 2026–2031 U.S. Geological Survey strategy for a hazard ready Nation—Actionable science for risk reduction
Executive Summary The USGS Strategy for a Hazard Ready Nation provides an approach that U.S. Geological Survey (USGS) researchers and staff can use to deliver actionable, user-focused science that supports risk-informed decision making aimed at reducing risk and losses across the Nation. The Strategy builds upon successful efforts within the USGS and seeks to promote and prioritize...
Authors
Alice B. Pennaz, Jack R. Friedman, Nathan J. Wood, Jacqueline R. Meszaros
U.S. Geological Survey Monitoring Milestones—Oe-151 at Woodgate, NY (433112075091501) U.S. Geological Survey Monitoring Milestones—Oe-151 at Woodgate, NY (433112075091501)
On July 9, 1926, monitoring well Oe-151 at Woodgate, New York (USGS ID 433112075091501) recorded its first groundwater data. Since then, the well has provided water data nearly continuously and has now reached a 100-year milestone for data collection. The well is part of the U.S. Geological Survey (USGS) Climate Response Network (CRN), which is a national network of wells selected to...
Authors
Claire E. Bunch, Rodney R. Caldwell
Methods for estimating selected low-flow frequency and mean annual flow statistics at gaged and ungaged locations on streams in Georgia, North Carolina, and South Carolina Methods for estimating selected low-flow frequency and mean annual flow statistics at gaged and ungaged locations on streams in Georgia, North Carolina, and South Carolina
The U.S. Geological Survey, in cooperation with the Georgia Department of Natural Resources (Environmental Protection Division), North Carolina Department of Environmental Quality (Division of Water Resources), North Carolina Department of Public Safety (Office of Recovery and Resiliency), and South Carolina Department of Environmental Services, updated low-flow frequency, mean annual...
Authors
Toby D. Feaster, Bradley J. Harken, Brent T. Aulenbach, Katharine R. Kolb, Caleb E. Mitchell, J. Curtis Weaver
Requirements, capabilities, and analysis for Earth observations—From user needs to Earth observation solutions Requirements, capabilities, and analysis for Earth observations—From user needs to Earth observation solutions
Introduction At the core of the Nation’s land imaging enterprise, the Requirements, Capabilities, and Analysis for Earth Observations (RCA-EO) project serves as the backbone for understanding user needs and shaping the future of Earth observation (EO) systems, products, and technology development. Understanding user needs and continuously tracking observing system capabilities is...
Authors
Iris J. Garthwaite, Ellen Wengert
Determination of baseline water-quality conditions using continuous specific conductance and discrete measurements of total dissolved solids and selected major ions, Arkansas River Basin, Colorado Determination of baseline water-quality conditions using continuous specific conductance and discrete measurements of total dissolved solids and selected major ions, Arkansas River Basin, Colorado
From 2022 through 2024, the U.S. Geological Survey (USGS) in cooperation with the Regional Resources Planning Group (Southeastern Colorado Water Conservancy District, Colorado Springs Utilities, Pueblo Water, Lower Arkansas Valley Water Conservancy District, Aurora Water, and Upper Arkansas Water Conservancy District) established a basinwide water-quality monitoring network in the...
Authors
Lisa D. Miller, Lauren E. Eng, Jackson B. Sharp
Small creatures, big challenge: A review of current knowledge and assessment of research needs to inform water withdrawal management for the Duck River's freshwater mussel fauna Small creatures, big challenge: A review of current knowledge and assessment of research needs to inform water withdrawal management for the Duck River's freshwater mussel fauna
The Duck River is a remarkable national resource, boasting outstanding biodiversity (Ahlstedt et al. 2017). It contains 151 fish species, over 60 mussel species, and 22 snail species, many of which are federally listed (Etnier and Starnes 1993; Johnson et al. 2013; Ahlstedt et al. 2017; Womble and Rosenberger 2025a). The Duck River watershed is at a pivotal time in its management and...
Authors
Kristin Irwin Womble, Amanda E. Rosenberger
Avoiding common pitfalls in the implementation of adaptive forest wildlife management Avoiding common pitfalls in the implementation of adaptive forest wildlife management
Forest management planning requires the evaluation of tradeoffs in proposed management actions to meet multiple objectives, including providing the habitat required to sustain wildlife populations. However, various species-specific life history strategies and ecological uncertainties complicate our understanding of the responses of wildlife to disturbances, such as wildfires and forest...
Authors
Adam Duarte, James T. Peterson