Conference Papers
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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.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
Filter Total Items: 5326
Changes in the discharge of sediment through the Missouri-Mississippi River system, 1940-2007
Presentation. No abstract available.
Authors
Robert H. Meade, John A. Moody
Consistent and efficient processing of ADCP streamflow measurements
The use of Acoustic Doppler Current Profilers (ADCPs) from a moving boat is a commonly used method for measuring streamflow. Currently, the algorithms used to compute the average depth, compute edge discharge, identify invalid data, and estimate velocity and discharge for invalid data vary among manufacturers. These differences could result in different discharges being computed from identical dat
Authors
David S. Mueller
Contributions of moderately low flows and large floods to geomorphic change in the Rio Puerco Arroyo, New Mexico
Abstract—From the mid-1800s to around 1930, monsoonal floods incised an arroyo roughly 100 m wide and 10 m deep along the lower Rio Puerco, NM, from the confluence with the Rio San Jose downstream to the mouth at the Rio Grande, causing sedimentation and flooding downstream. Since the 1930s, the channel has greatly narrowed, a densely vegetated floodplain has developed, the arroyo has partly fille
Authors
Eleanor R. Griffin, Jonathan M. Friedman
Defining resilience: A preliminary integrative literature review
The term “resilience” is ubiquitous in technical literature; it appears in numerous forms, such as resilience, resiliency, or resilient, and each use may have a different definition depending on the interpretation of the writer. This creates difficulties in understanding what is meant by ‘resilience’ in any given use case, especially in discussions of interdisciplinary research. To better understa
Authors
Bonnie Wilt, Suzanna K. Long, Thomas G. Shoberg
Field and laboratory determination of water-surface elevation and velocity using noncontact measurements
Noncontact methods for measuring water-surface elevation and velocity in laboratory flumes and rivers are presented with examples. Water-surface elevations are measured using an array of acoustic transducers in the laboratory and using laser scanning in field situations. Water-surface velocities are based on using particle image velocimetry or other machine vision techniques on infrared video of t
Authors
Jonathan M. Nelson, Paul J. Kinzel, Mark Walter Schmeeckle, Richard R. McDonald, Justin T. Minear
Forest structure of oak plantations after silvicultural treatment to enhance habitat for wildlife
During the past 30 years, thousands of hectares of oak-dominated bottomland hardwood plantations have been planted on agricultural fields in the Mississippi Alluvial Valley. Many of these plantations now have closed canopies and sparse understories. Silvicultural treatments could create a more heterogeneous forest structure, with canopy gaps and increased understory vegetation for wildlife. La
Authors
Daniel J. Twedt, Cherrie-Lee P. Phillip, Michael P. Guilfoyle, R. Randy Wilson
Geologic context of large karst springs and caves in the Ozark National Scenic Riverways, Missouri
The ONSR is a karst park, containing many springs and caves. The “jewels” of the park are large springs, several of first magnitude, that contribute significantly to the flow and water quality of the Current River and its tributaries. Completion of 1:24,000-scale geologic mapping of the park and surrounding river basin, along with synthesis of published hydrologic data, allows us to examine the sp
Authors
David J. Weary, Randall C. Orndorff
Hematology results from experimental exposure of sandhill cranes to West Nile virus
West Nile virus is a deadly virus for young cranes. In testing two different vaccines on both adult sandhill cranes (Grus canadensis), we discovered that some blood parameters are altered by exposure to the virus. White blood cell counts were the most obvious, and may be used as an indicator of West Nile virus exposure in cranes. Other hematology and serum chemistry results were studied and only h
Authors
Glenn H. Olsen
High performance computing to support multiscale representation of hydrography for the conterminous United States
The National Hydrography Dataset (NHD) for the United States furnishes a comprehensive set of vector features representing the surface-waters in the country (U.S. Geological Survey 2000). The high-resolution (HR) layer of the NHD is largely comprised of hydrographic features originally derived from 1:24,000-scale (24K) U.S. Topographic maps. However, in recent years (2009 to present) densified hyd
Authors
Larry V. Stanislawski, Yan Liu, Barbara P. Buttenfield, Kornelijus Survila, Jeffrey Wendel, Abdurraouf Okok
Hydrologic effects on diameter growth phenology for Celtis laevigata and Quercus lyrata in the floodplain of the lower White River, Arkansas
Bottomland hardwood (BLH) forests represent an extensive wetland system in the Mississippi Alluvial Valley and southeastern USA, and it is currently undergoing widespread transition in species composition. One such transition involves increased establishment of sugarberry (Celtis laevigata), and decreased establishment of overcup oak (Quercus lyrata). The ecological mechanisms that control this tr
Authors
Scott T. Allen, Wesley Cochran, Ken W. Krauss, Richard F. Keim, Sammy L. King
Hydrologic response of desert wetlands to Holocene climate change: preliminary results from the Soda Springs area, Mojave National Preserve, California
Desert wetlands are common features in arid environments and include a variety of hydrologic facies, including seeps, springs, marshes, wet meadows, ponds, and spring pools. Wet ground conditions and dense stands of vegetation in these settings combine to trap eolian, alluvial, and fluvial sediments that accumulate over time. The resulting deposits are collectively called ground-water discharge
Authors
Jeffrey S. Pigati, Marith C. Reheis, John P. McGeehin, Jeffrey S. Honke, J. Bright
Improved geomagnetic referencing in the Arctic environment
Geomagnetic referencing uses the Earth’s magnetic field to determine accurate wellbore positioning essential for success in today's complex drilling programs, either as an alternative or a complement to north-seeking gyroscopic referencing. However, fluctuations in the geomagnetic field, especially at high latitudes, make the application of geomagnetic referencing in those areas more challenging.
Authors
B. Poedjono, N. Beck, A. C. Buchanan, L. Borri, S. Maus, Carol Finn, E. William Worthington, Tim White