Conference Papers
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 almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Computing time-series suspended-sediment concentrations and loads from in-stream turbidity-sensor and streamflow data
Over the last decade, use of a method for computing suspended-sediment concentration and loads using turbidity sensors—primarily nephelometry, but also optical backscatter—has proliferated. Because an in- itu turbidity sensor is capa le of measuring turbidity instantaneously, a turbidity time series can be recorded and related directly to time-varying suspended-sediment concentrations. Depending o
Authors
Patrick P. Rasmussen, John R. Gray, G. Doug Glysson, Andrew C. Ziegler
Data mining for water resource management part 2 - methods and approaches to solving contemporary problems
This is the second of two papers that describe how data mining can aid natural-resource managers with the difficult problem of controlling the interactions between hydrologic and man-made systems. Data mining is a new science that assists scientists in converting large databases into knowledge, and is uniquely able to leverage the large amounts of real-time, multivariate data now being collected f
Authors
Edwin A. Roehl, Paul Conrads
Development of a national, dynamic reservoir-sedimentation database
The importance of dependable, long-term water supplies, coupled with the need to quantify rates of capacity loss of the Nation’s re servoirs due to sediment deposition, were the most compelling reasons for developing the REServoir- SEDimentation survey information (RESSED) database and website. Created under the auspices of the Advisory Committee on Water Information’s Subcommittee on Sedimenta io
Authors
J. R. Gray, J.M. Bernard, D. W. Stewart, E.J. McFaul, K.W. Laurent, G. E. Schwarz, J.T. Stinson, M.M. Jonas, T. J. Randle, J.W. Webb
Development of inferential sensors for real-time quality control of water-level data for the Everglades Depth Estimation Network
The Everglades Depth Estimation Network (EDEN) is an integrated network of real-time water-level gaging stations, ground-elevation models, and watersurface models designed to provide scientists, engineers, and water-resource managers with current (2000-present) water-depth information for the entire freshwater portion of the greater Everglades. The generation of EDEN waterlevel surfaces is derived
Authors
Ruby C. Daamen, Jr. Edwin A. Roehl, Paul Conrads
Do three massive coral species from the same reef record the same SST signal? A test from the Dry Tortugas, Florida Keys
Paleoclimatologists have reconstructed century-long records of sea surface temperature (SST) in the Pacific using the Sr/Ca of massive corals, whereas similar reconstructions in the Atlantic have not proceeded at the same pace. Past research in the Florida Keys has focused on Montastrea spp., an abundant and fast-growing massive coral, thus a good candidate for climate reconstructions. However, co
Authors
K. L. DeLong, R. Z. Poore, C. D. Reich, J. A. Flannery, Christopher R. Maupin, T. M. Quinn
Effect of sea-level rise on future coastal groundwater resources in southern Florida, USA
An existing variable‐density groundwater flow and solute transport model, developed for the northern part of Broward County, Florida, was used to predict the effect of sealevel rise on future coastal groundwater resources. Using average annual conditions from 2005, simulations were performed for 100 years into the future using four different rates of sea‐level rise: 0, 24, 48, and 88 centimeters p
Authors
Christian D. Langevin, Michael R. Zygnerski, Jeremy T. White, Joseph D. Hughes
Flow resistance in open channels with fixed movable bed
In spite of an increasingly large body of research by many investigators, accurate quantitative prediction of open channel flow resistance remains a challenge. In general, the relations between the elements influencing resistance (turbulence, boundary roughness, and channel shape features, such as discrete obstacles, bars, channel curvature, recirculation areas, secondary circulation, etc.) and me
Authors
Francisco J. Simoes
Fluvial sediment in the environment: a national challenge
Sediment and sediment-associated constituents can contribute substantially to water-quality impairment. In the past, sediment was viewed mainly as an engineering problem that affected reservoir storage capacity, shipping channel maintenance, and bridge scour, as well as the loss of agricultural soil. Sediment is now recognized as a major cause of aquatic system degradation in many rivers and strea
Authors
Matthew C. Larsen, Allen C. Gellis, G. Douglas Glysson, John R. Gray, Arthur J. Horowitz
Functional linear models to test for differences in prairie wetland hydraulic gradients
Functional data analysis provides a framework for analyzing multiple time series measured frequently in time, treating each series as a continuous function of time. Functional linear models are used to test for effects on hydraulic gradient functional responses collected from three types of land use in Northeastern Montana at fourteen locations. Penalized regression-splines are used to estimate th
Authors
Mark C. Greenwood, Richard S. Sojda, Todd M. Preston
Gas storage in the Upper Devonian-Lower Mississippian Woodford Shale, Arbuckle Mountains, Oklahoma: how much of a role do the cherts play?
How gas is stored in shale-gas systems is a critical element in characterizing these potentially prolific, low-porosity/permeability reservoirs. An integrated mineralogic, geochemical, and porosity/permeability study is of the Upper Devonian-Lower Mississippian Woodford Shale, Arbuckle Mountains, southern Oklahoma, at locations previously described through detailed stratigraphic and spectral gamma
Authors
Neil S. Fishman, Geoffrey S. Ellis, Stanley T. Paxton, Marvin M. Abbott, Adam Boehlke
Geometric evaluation and validation of aerial and satellite data using Sioux Falls Geometric test range
No abstract available.
Authors
Aparajithan Sampath, Donald Moe, Jon Christopherson, Gregory L. Stensaas
High resolution near-bed observations in winter near Cape Hatteras, North Carolina
The U.S. Geological Survey (USGS) Coastal and Marine Science Center in Woods Hole, Massachusetts, is leading an effort to understand the regional sediment dynamics along the coastline of North and South Carolina. As part of the Carolinas Coastal Change Processes Project, a geologic framework study in June of 2008 by the Woods Hole Coastal and Marine Science Center's Sea Floor Mapping Group focused
Authors
Marinna A. Martini, Brandy N. Armstrong, John C. Warner