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.
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Paleolimnology of Lake Tanganyika, East Africa, over the past 100 k yr
New sediment core data from a unique slow-sedimentation rate site in Lake Tanganyika contain a much longer and continuous record of limnological response to climate change than have been previously observed in equatorial regions of central Africa. The new core site was first located through an extensive seismic reflection survey over the Kavala Island Ridge (KIR), a sedimented basement high that s
Authors
C.A. Scholz, J.W. King, G.S. Ellis, Peter K. Swart, J.C. Stager, Steven M. Colman
Partitioning loss rates of early juvenile blue crabs from seagrass habitats into mortality and emigration
Determining how post-settlement processes modify patterns of settlement is vital in understanding the spatial and temporal patterns of recruitment variability of species with open populations. Generally, either single components of post-settlement loss (mortality or emigration) are examined at a time, or else the total loss is examined without discrimination of mortality and emigration components.
Authors
L.L. Etherington, D.B. Eggleston, W.T. Stockhausen
Predicting toxic effects of metals on aquatic biota in mineralized areas using the biotic ligand model
No abstract available.
Authors
Kathleen S. Smith, James F. Ranville, Stan E. Church, David L. Fey, Richard B. Wanty, James G. Crock
Preface: Phragmites australis - A Sheep in Wolf's Clothing?
[No abstract available]
Authors
M.P. Weinstein, J.R. Keough, G.R. Guntenspergen, S.Y. Litvin
Profiling river surface velocities and volume flow estimation with bistatic UHF RiverSonde radar
From the velocity profiles across the river, estimates of total volume flow for the four methods were calculated based on a knowledge of the bottom depth vs position across the river. It was found that the flow comparisons for the American River were much closer, within 2% of each other among all of the methods. Sources of positional biases and anomalies in the RiverSonde measurement patterns alon
Authors
D. Barrick, C. Teague, P. Lilleboe, R. Cheng, J. Gartner
Rainfall and River Currents Retrieved from Microwave Backscatter
The use of CW microwave sensors in yielding information on both river surface velocities and rain rates was discussed. Eight CW microwave sensors were installed at Cowlitz river in Western Washington State in the US. The sensors measured the river surface velocity via Doppler shifts at eight locations across the river. Comparison of the surface velocities derived from the sensors mounted on the br
Authors
W.J. Plant, W.C. Keller, K. Hayes, J. Nystuen, K. Spicer
Real-time seismic data from the coastal ocean
A moored-buoy system for collecting real-time seismic data from the coastal ocean has been developed and will be deployed for its initial field trial in the fall of 2003. The key component in this moored system is an ultra-stretchy mooring hose that provides compliance for waves and currents and protects the electrical conductors connecting an Ocean Bottom Seismometer (OBS) to a surface buoy from
Authors
D. Frye, Uri S. ten Brink, W. Paul, K. Peal, K. Von Der Heydt
Recent progress in the development of a SPARROW model of sediment for the conterminous U.S.
Suspended sediment has long been recognized as an important contaminant affecting water resources. Besides its direct role in determining water clarity, bridge scour and reservoir storage, sediment serves as a vehicle for the transport of many binding contaminants, including nutrients, trace metals, semi- volatile organic compounds, and numerous pesticides (U.S. Environmental Protection Agency 200
Authors
Gregory Schwarz, Richard Smith, Richard Alexander, John Gray
Reclaiming agricultural drainage water with nanofiltration membranes: Imperial Valley, California, USA
We conducted pilot-scale field experiments using nanofiltration membranes to lower the salinity and remove Se, As and other toxic contaminants from saline agricultural wastewater in the Imperial Valley, California, USA. Farmlands in the desert climate (rainfall - 7.4 cm/a) of Imperial Valley cover -200,000 ha that are irrigated with water (-1.7 km3 annually) imported from the Colorado River. The s
Authors
Y.K. Kharaka, R. A. Schroeder, J. G. Setmire
By
Regional carbon dynamics in monsoon Asia and its implications for the global carbon cycle
Data on three major determinants of the carbon storage in terrestrial ecosystems are used with the process-based Terrestrial Ecosystem Model (TEM) to simulate the combined effect of climate variability, increasing atmospheric CO2 concentration, and cropland establishment and abandonment on the exchange of CO2 between the atmosphere and monsoon Asian ecosystems. During 1860-1990, modeled results su
Authors
H. Tian, J. M. Melillo, D. W. Kicklighter, S. Pan, J. Liu, A. D. McGuire, B. Moore
Relative importance of early-successional forests and shrubland habitats to mammals in the northeastern United States
The majority of the 60 native terrestrial mammal species that reside in the northeastern United States (US) utilize resources from several habitats on a seasonal basis. However, as many as 20 species demonstrate some preference for early-successional forests, shrublands, or old-field habitats. A few of these (e.g. lagomorphs) can be considered obligate users of these habitats, and the specialist c
Authors
T.K. Fuller, S. DeStefano
Remediation of acid mine drainage at the friendship hill national historic site with a pulsed limestone bed process
A new process utilizing pulsed fluidized limestone beds was tested for the remediation of acid mine drainage at the Friendship Hill National Historic Site, in southwestern Pennsylvania. A 230 liter-per-minute treatment system was constructed and operated over a fourteen-month period from June 2000 through September 2001. Over this period of time, 50,000 metric tons of limestone were used to treat
Authors
P.L. Sibrell, B. Watten, T. Boone