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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Geologic structure of the Yucaipa area inferred from gravity data, San Bernardino and Riverside Counties, California Geologic structure of the Yucaipa area inferred from gravity data, San Bernardino and Riverside Counties, California
In the spring of 2009, the U.S. Geological Survey, in cooperation with the San Bernardino Valley Municipal Water District, began working on a gravity survey in the Yucaipa area to explore the three-dimensional shape of the sedimentary fill (alluvial deposits) and the surface of the underlying crystalline basement rocks. As water use has increased in pace with rapid urbanization, water...
Authors
Gregory O. Mendez, Victoria E. Langenheim, Andrew Morita, Wesley R. Danskin
MT3D-USGS version 1: A U.S. Geological Survey release of MT3DMS updated with new and expanded transport capabilities for use with MODFLOW MT3D-USGS version 1: A U.S. Geological Survey release of MT3DMS updated with new and expanded transport capabilities for use with MODFLOW
MT3D-USGS, a U.S. Geological Survey updated release of the groundwater solute transport code MT3DMS, includes new transport modeling capabilities to accommodate flow terms calculated by MODFLOW packages that were previously unsupported by MT3DMS and to provide greater flexibility in the simulation of solute transport and reactive solute transport. Unsaturated-zone transport and transport...
Authors
Vivek Bedekar, Eric D. Morway, Christian D. Langevin, Matthew J. Tonkin
User’s manual for the Automated Data Assurance and Management application developed for quality control of Everglades Depth Estimation Network water-level data User’s manual for the Automated Data Assurance and Management application developed for quality control of Everglades Depth Estimation Network water-level data
The generation of Everglades Depth Estimation Network (EDEN) daily water-level and water-depth maps is dependent on high quality real-time data from over 240 water-level stations. To increase the accuracy of the daily water-surface maps, the Automated Data Assurance and Management (ADAM) tool was created by the U.S. Geological Survey as part of Greater Everglades Priority Ecosystems...
Authors
Matthew D. Petkewich, Ruby C. Daamen, Edwin A. Roehl, Paul Conrads
Using inferential sensors for quality control of Everglades Depth Estimation Network water-level data Using inferential sensors for quality control of Everglades Depth Estimation Network water-level data
The Everglades Depth Estimation Network (EDEN), with over 240 real-time gaging stations, provides hydrologic data for freshwater and tidal areas of the Everglades. These data are used to generate daily water-level and water-depth maps of the Everglades that are used to assess biotic responses to hydrologic change resulting from the U.S. Army Corps of Engineers Comprehensive Everglades...
Authors
Matthew D. Petkewich, Ruby C. Daamen, Edwin A. Roehl, Paul Conrads
2011 Souris River flood—Will it happen again? 2011 Souris River flood—Will it happen again?
The Souris River Basin is a 61,000 square kilometer basin in the provinces of Saskatchewan and Manitoba and the state of North Dakota. Record setting rains in May and June of 2011 led to record flooding with peak annual streamflow values (762 cubic meters per second [m3/s]) more than twice that of any previously recorded peak streamflow and more than five times the estimated 100 year
Authors
Rochelle A. Nustad, Kelsey A. Kolars, Aldo V. Vecchia, Karen R. Ryberg
Altitudes and thicknesses of hydrogeologic units of the Ozark Plateaus aquifer system in Arkansas, Kansas, Missouri, and Oklahoma Altitudes and thicknesses of hydrogeologic units of the Ozark Plateaus aquifer system in Arkansas, Kansas, Missouri, and Oklahoma
A hydrogeologic framework was constructed to represent the altitudes and thicknesses of hydrogeologic units within the Ozark Plateaus aquifer system as part of a regional groundwater-flow model supported by the U.S. Geological Survey Water Availability and Use Science Program. The Ozark Plateaus aquifer system study area is nearly 70,000 square miles and includes parts of Arkansas...
Authors
Drew A. Westerman, Jonathan A. Gillip, Joseph M. Richards, Phillip D. Hays, Brian R. Clark
Cyanobacterial harmful algal blooms and U.S. Geological Survey science capabilities Cyanobacterial harmful algal blooms and U.S. Geological Survey science capabilities
Cyanobacterial harmful algal blooms (CyanoHABs) are increasingly a global concern because CyanoHABs pose a threat to human and aquatic ecosystem health and cause economic damages. Despite advances in scientific understanding of cyanobacteria and associated compounds, many unanswered questions remain about occurrence, environmental triggers for toxicity, and the ability to predict the...
Authors
Jennifer L. Graham, Neil M. Dubrovsky, Sandra M. Eberts
Monitoring and research on the Bi-State Distinct Population Segment of greater sage-grouse (Centrocercus urophasianus) in the Pine Nut Mountains, California and Nevada—Study progress report, 2011–15 Monitoring and research on the Bi-State Distinct Population Segment of greater sage-grouse (Centrocercus urophasianus) in the Pine Nut Mountains, California and Nevada—Study progress report, 2011–15
The Bi-State distinct population segment (DPS) of greater sage-grouse (Centrocercus urophasianus) that occurs along the Nevada–California border was proposed for listing as threatened under the Endangered Species Act (ESA) by the U.S. Fish and Wildlife Service (FWS) in October 2013. However, in April 2015, the FWS determined that the Bi-State DPS no longer required protection under the...
Authors
Peter S. Coates, Katie M. Andrle, Pilar T. Ziegler, Michael L. Casazza
U.S. Geological Survey science for the Wyoming Landscape Conservation Initiative—2015 annual report U.S. Geological Survey science for the Wyoming Landscape Conservation Initiative—2015 annual report
This is the eighth annual report highlighting U.S. Geological Survey (USGS) science and decision-support activities conducted for the Wyoming Landscape Conservation Initiative (WLCI). The activities address specific management needs identified by WLCI partner agencies. In 2015, USGS scientists continued 24 WLCI projects in 5 categories: (1) acquiring and analyzing resource-condition data...
Authors
Zachary H. Bowen, Cameron L. Aldridge, Patrick J. Anderson, Timothy J. Assal, Timothy T. Bartos, Anna D. Chalfoun, Geneva W. Chong, Marie K. Dematatis, Cheryl A. Eddy-Miller, Steven L. Garman, Stephen S. Germaine, Collin G. Homer, Matthew J. Kauffman, Christopher C. Huber, Daniel J. Manier, Cynthia P. Melcher, Kirk A. Miller, Tamar Norkin, Lindsey E. Sanders, Annika W. Walters, Anna B. Wilson, Teal B. Wyckoff
USGS science and technology help managers battle invading Asian carp USGS science and technology help managers battle invading Asian carp
The U.S. Geological Survey (USGS) conducts Asian carp research focused on early detection, risk assessment, and development of control tools and strategies. The goals are to prevent the establishment of invasive Asian carp in the Great Lakes and to reduce their impacts in the Ohio River and Mississippi River Basins and elsewhere. Managers can use the information, tools, and strategies...
Authors
Cynthia S. Kolar, Sandra S. Morrison
The Department of the Interior Southeast Climate Science Center synthesis report 2011–15—Projects, products, and science priorities The Department of the Interior Southeast Climate Science Center synthesis report 2011–15—Projects, products, and science priorities
Authors
Elda Varela Minder, Aranzazu R. Lascurain, Gerard McMahon
Aquatic biological communities and associated habitats at selected sites in the Big Wood River Watershed, south-central Idaho, 2014 Aquatic biological communities and associated habitats at selected sites in the Big Wood River Watershed, south-central Idaho, 2014
Assessments of streamflow (discharge) parameters, water quality, physical habitat, and biological communities were completed between May and September 2014 as part of a monitoring program in the Big Wood River watershed of south-central Idaho. The sampling was conducted by the U.S. Geological Survey in cooperation with Blaine County, Trout Unlimited, the Nature Conservancy, and the Wood...
Authors
Dorene E. MacCoy, Terry M. Short