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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Hydrogeology and simulation of groundwater flow in Columbia County, Wisconsin Hydrogeology and simulation of groundwater flow in Columbia County, Wisconsin
This report describes the regional hydrogeology and groundwater resources of Columbia County, Wisconsin, and documents a regional groundwater flow model developed for the county. Regional hydrostratigraphic units include the unlithified aquifer, the upper bedrock aquifer, and the Elk Mound aquifer. The unlithified aquifer consists of deposits that range in composition from sand and...
Authors
Madeline Gotkowitz, Andrew T. Leaf, Steven M. Sellwood
Conceptual and numerical groundwater flow model of the Cedar River alluvial aquifer system with simulation of drought stress on groundwater availability near Cedar Rapids, Iowa, for 2011 through 2013 Conceptual and numerical groundwater flow model of the Cedar River alluvial aquifer system with simulation of drought stress on groundwater availability near Cedar Rapids, Iowa, for 2011 through 2013
Between July 2011 and February 2013, the City of Cedar Rapids observed water level declines in their horizontal collector wells approaching 11 meters. As a result, pumping from these production wells had to be halted, and questions were raised about the reliability of the alluvial aquifer under future drought conditions. The U.S. Geological Survey, in cooperation with the City of Cedar...
Authors
Adel E. Haj, Wonsook S. Ha, Lance R. Gruhn, Emilia L. Bristow, Amy M. Gahala, Joshua F. Valder, Carole D. Johnson, Eric A. White, Shelby P. Sterner
Methods for estimating low-flow frequency statistics, mean monthly and annual flow, and flow-duration curves for ungaged locations in Kansas Methods for estimating low-flow frequency statistics, mean monthly and annual flow, and flow-duration curves for ungaged locations in Kansas
No abstract available.
Authors
Bradley S. Lukasz
Technical note—Relative variability of selected turbidity standards and sensors in use by the U.S. Geological Survey Technical note—Relative variability of selected turbidity standards and sensors in use by the U.S. Geological Survey
The challenges associated with field measurements of turbidity are well known and result primarily from differences in reported values that depend on instrument design and the resulting need for reporting units that are specific to those designs. A critical challenge for making comparable turbidity measurements is the selection and use of appropriate turbidity standards for sensor...
Authors
Guy M. Foster, Lindsey R. King, John D. Jastram, John K. Joiner, Brian A. Pellerin, Jennifer L. Graham, Thomas J. Williams
U.S. Geological Survey Great Lakes Science Forum—Summary of remaining data and science needs and next steps U.S. Geological Survey Great Lakes Science Forum—Summary of remaining data and science needs and next steps
A U.S. Geological Survey-led assessment of data gaps and science needs across the Great Lakes ecosystem indicated the following: • Expanded data collection or monitoring would provide basic ecosystem, social, and public health data to manage the Great Lakes system and to develop and test models and decision support tools. • New science and advanced technologies (for example, sensors and...
Authors
Leon M. Carl, Jon Hortness, Russell M. Strach
Intelligent monitoring system for real-time geologic storage, optimization, and reservoir management Intelligent monitoring system for real-time geologic storage, optimization, and reservoir management
The objective of the subtask was to develop a near-real-time monitoring system for seismic data at the Decatur, IL, geologic carbon sequestration (GCS) site and specifically include fiber-optic cable derived distributed acoustic signal (DAS) data in the process. Owing to the large volumes of data, we opted to utilize existing deep borehole conventional seismic sensors for detection and...
Authors
J. Ole Kaven
Fire refugia in old-growth forests: Predicting habitat persistence to support land management in an era of rapid global change Fire refugia in old-growth forests: Predicting habitat persistence to support land management in an era of rapid global change
Recent stand-replacing wildfires in late-successional and old-growth (LSOG) forests have increased land manager interest in fire refugia, which could provide vital habitat for threatened and endangered species during a time of rapid change. The overall goal of this project was to model, map, and share information essential for the conservation of LSOG forest ecosystems in the U.S...
Authors
Cameron E. Naficy, Garrett W. Meigs, Matt J. Gregory, Ray Davis, David M. Bell, Katie M. Dugger, J. David Wiens, Meg A. Krawchuk
Louisiana Trustee Implementation Group monitoring and adaptive management strategy (LA TIG MAM Strategy) Louisiana Trustee Implementation Group monitoring and adaptive management strategy (LA TIG MAM Strategy)
The purpose of the Louisiana Trustee Implementation Group (LA TIG) Monitoring and Adaptive Management (MAM) Strategy is to outline an approach for the LA TIG to prioritize MAM activities in Louisiana for effective and efficient evaluation of the restoration of resources injured by the Deepwater Horizon (DWH) oil spill. Working from the Restoration Goals and Restoration Approaches...
Avian predation of juvenile Lost River and Shortnose Suckers in Upper Klamath Lake: An assessment of Sucker assisted rearing program releases during 2018–2020 Avian predation of juvenile Lost River and Shortnose Suckers in Upper Klamath Lake: An assessment of Sucker assisted rearing program releases during 2018–2020
To bolster recruitment in Endangered Species Act (ESA) listed Lost River Suckers (Deltistes luxatus) and Shortnose Suckers (Chasmistes brevirostris) in the Upper Klamath Basin (UKB), the U.S. Fish and Wildlife Service (USFWS) and its partners have implemented the Sucker Assisted Rearing Program (SARP). As part of this program, juvenile suckers were reared in captivity, implanted with...
Authors
Allen F. Evans, Quinn Payton, Nathan V Banet, Bradley M. Cramer, Caylen Kelsey, David A. Hewitt
Lake Ontario 2018 coordinated science and monitoring initiative (CSMI) quagga mussel growth experiment and a lake-wide quagga mussel condition assessment Lake Ontario 2018 coordinated science and monitoring initiative (CSMI) quagga mussel growth experiment and a lake-wide quagga mussel condition assessment
No abstract available.
Authors
Ashley Elgin, Paul Glyshaw, Brian Weidel
Quantifying Lake Ontario coregonine habitat use dynamic’s across space and time to inform assessment and restoration Quantifying Lake Ontario coregonine habitat use dynamic’s across space and time to inform assessment and restoration
No abstract available.
Authors
Brian Weidel, Taylor Brown, Michael Connerton, Jeremy Holden, Dimitry Gorsky
Characterization of water resources in the Big Lost River Basin, south-central Idaho Characterization of water resources in the Big Lost River Basin, south-central Idaho
Water resources in the Big Lost River Basin, Idaho are vital to irrigated agriculture, domestic, municipal and other uses but declining groundwater levels, diminished streamflows, and concern about drought motivated an evaluation of water resources in the basin. This multichapter volume documents the findings of a hydrogeologic investigation of the Big Lost River Basin that was jointly...