Conference Papers
Science Quality and Integrity
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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: 5599
Liquemap: A real-time post-earthquake map of liquefaction probability Liquemap: A real-time post-earthquake map of liquefaction probability
No abstract available.
Authors
Michael J. Bennett, Luke Blair, Thomas L. Holzer, Thomas E. Noce
Assessment of ground deformation due to soil liquefaction in the San Jose, California area by using geotechnical IT Assessment of ground deformation due to soil liquefaction in the San Jose, California area by using geotechnical IT
No abstract available.
Authors
Robert E. Kayen, Keith L. Knudsen, Satoshi Nagata, Yasuo Tanaka
Miocene gold mineralization and exhumation of the southern Shoshone Range, north-central Nevada Miocene gold mineralization and exhumation of the southern Shoshone Range, north-central Nevada
No abstract available.
Authors
Thomas E. Moore, P. B. O’Sullivan
Relations among pH, sulfate, and metals concentrations in anthracite and bituminous coal-mine discharges, Pennsylvania Relations among pH, sulfate, and metals concentrations in anthracite and bituminous coal-mine discharges, Pennsylvania
Water-quality data for discharges from 140 abandoned mines in the Bituminous and Anthracite Coalfields of Pennsylvania illustrate relations among pH, sulfate, and dissolved metal concentrations. The pH for the 140 samples ranged from 2.7 to 7.3, with two modes at pH 2.5 to 4 (acidic) and 6 to 7 (near neutral). Generally, flow rates were smaller and solute concentrations were greater for...
Authors
III Cravotta
Textural analysis of marine sediments at the USGS Woods Hole Science Center; methodology and data on DVD Textural analysis of marine sediments at the USGS Woods Hole Science Center; methodology and data on DVD
Marine sediments off the eastern United States vary markedly in texture (i.e., the size, shape, composition, and arrangement of their grains) due to a complex geologic history. For descriptive purposes, however, it is typically most useful to classify these sediments according to their grain-size distributions. In 1962, the U.S. Geological Survey began a program to study the marine...
Authors
Lawrence J. Poppe, S. Jeffress Williams, Valerie F. Paskevich
Scaling-up of CO2 fluxes to assess carbon sequestration in rangelands of Central Asia Scaling-up of CO2 fluxes to assess carbon sequestration in rangelands of Central Asia
Flux towers provide temporal quantification of local carbon dynamics at specific sites. The number and distribution of flux towers, however, are generally inadequate to quantify carbon fluxes across a landscape or ecoregion. Thus, scaling up of flux tower measurements through use of algorithms developed from remote sensing and GIS data is needed for spatial extrapolation of carbon fluxes...
Authors
Bruce K. Wylie, Tagir G. Gilmanov, Douglas A. Johnson, Nicanor Z. Saliendra, Larry L. Tieszen, Ruth Anne F. Doyle, Emilio Laca
Range condition as input to water quality monitoring in the northern Plains Range condition as input to water quality monitoring in the northern Plains
Federal Clean Water Act requires that states develop Total Maximum Daily Loads (TMDLs) for water bodies. Once the state has developed an inventory of TMDLs, it is required to provide public notice of the report and have it approved by the Environmental Protection Agency. The South Dakota Department of Environment and Natural Resources (DENR) is using the USDA’s annualized Agricultural...
Authors
Eric C. Wood, Bruce K. Wylie, Jesslyn F. Brown, David J. Meyer, Susan Maxwell, Bradley C. Reed
Analysis of urban land use change in the Las Vegas metropolitan area using multi-temporal satellite imagery Analysis of urban land use change in the Las Vegas metropolitan area using multi-temporal satellite imagery
Urban development has expanded rapidly in Las Vegas, Nevada, over the last fifty years. To assess urban land use change in the area, a sub-pixel change detection approach has been used to map urban extent and its temporal changes by determining sub-pixel level impervious surface areas from Landsat satellite remote sensing data in conjunction with digital orthophotography. Sub-pixel...
Authors
George Z. Xian, Mike Crane, C. McMahon
Model-data fusion in the studies of terrestrial carbon sink Model-data fusion in the studies of terrestrial carbon sink
Current uncertainty in quantifying the global carbon budget remains a major contributing source of uncertainty in reliably projecting future climate change. Furthermore, quantifying the global carbon budget and characterizing uncertainties have emerged as critical to a successful implementation of United National Framework Convention on Climate Change and its Kyoto Protocol. Beyond...
Authors
G.A. Alexandrov, D. Chan, M. Chen, K. Gurney, K Higuchi, A Ito, C.D. Jones, A Komarov, K Mabuchi, D.M. Matross, F Veroustraete, W.W. Verstreten
Comparative analysis of GPP products estimated from an empirical model and MODIS Comparative analysis of GPP products estimated from an empirical model and MODIS
Carbon-cycle models have uncertainties associated with data inputs, parameters, and model algorithms. The prerequisite for an applicable model is that it should perform at an acceptable level of accuracy and uncertainties should be documented. In this study, we validated the gross primary productivity (GPP) data from a piecewise regression (PWR) model and the MODIS GPP model at five...
Authors
Li Zhang, Bruce K. Wylie, Thomas Loveland, Lei Ji
Radiometric characterization and performance assessment of the Ali using bulk trended data Radiometric characterization and performance assessment of the Ali using bulk trended data
No abstract available.
Authors
Tim Ruggles, Dennis Helder, Douglas M. Hollaren, Jim Nelson, Ron Morfitt