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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Implications of ground-deformation measurements across earth fissures in subsidence areas in the southwestern USA
Ground deformation was monitored at earth fissures in areas of land subsidence induced by groundwater extraction in the southwestern United States. The ground deformation is consistent with the mechanism that fissures are caused by horizontal strains generated by bending of overburden in response to localized differential compaction. Subsidence profiles indicated that localized differential subsid
Authors
Thomas L. Holzer
Integrated simulation of consumptive use and land subsidence in the Central Valley, California, for the past and for a future subject to urbanization and climate change
Competition for water resources is growing throughout California, particularly in the Central Valley where about 20% of all groundwater used in the United States is consumed for agriculture and urban water supply. Continued agricultural use coupled with urban growth and potential climate change would result in continued depletion of groundwater storage and associated land subsidence throughout the
Authors
Randall T. Hanson, Alan L. Flint, Claudia C. Faunt, Daniel R. Cayan, Lorraine E. Flint, Stanley A. Leake, Wolfgang Schmid
Herbicide treatment of invasive Vinca major growing with endangered Galium buxifolium, an island endemic
Galium buxifolium E. Greene [Rubiaceae] (sea-cliff bedstraw) is a small shrub restricted to San Miguel and Santa Cruz Islands, in the California Channel Islands. Almost all of the 26 known populations grow on vertical north-facing sea cliffs in native scrub, sandwiched between the sea below and non-native annual grasslands on the terraces above. A notable exception is a popula?tion at Pelican Bay
Authors
Kathryn McEachern, Katie Chess, Karen Flagg, Ken Niessen, Owen, Thompson
Applying GORE-TEX technology for rapid contaminant assessments at Fort Gordon, Georgia
The U.S. Geological Survey, in cooperation with the U.S. Department of the Army at Fort Gordon, Georgia, deployed GORE1 adsorbent samplers along creeks and floodplains to rapidly assess potential contamination at abandoned facilities and in adjacent surface water. The samplers provide screening-level data to determine the presence or absence of volatile organic compounds, semi-volatile organic com
Authors
Fred W. Falls, Larry G. Harrelson, W. Hagan Ratliff, John B. Wellborn, James Landmeyer
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 conceptual model of groundwater flow, Chesterfield County, South Carolina
Chesterfield County is located in the north central part of South Carolina (SC) and is adjacent to the North Carolina border. The County lies along the Fall Line, the geologic boundary between the Atlantic Coastal Plain (ACP) and Piedmont physiographic provinces. Between 2000 and 2007, the population increased from 42,768 to 43,191 people (U.S. Census Bureau, 2007). Associated with this population
Authors
Bruce G. Campbell, James Landmeyer
Harmful algal blooms: A case study in two mesotrophic drinking water supply reservoirs in South Carolina
Algal blooms can be harmful and a nuisance in a variety of aquatic ecosystems, including reservoirs and lakes. Cyanobacterial(blue-green algae) harmful algal blooms are notorious for producing both taste-and-odor compounds and potent toxins that may affect human health. Taste–and-odor episodes are aesthetic problems often caused by cyanobacterial-produced organic compounds (geosmin and methylisobo
Authors
Celeste A. Journey, Karen M. Beaulieu, Rodney R. Knight, Jennifer L. Graham, Jane M. Arrington, Rebecca West, John Westcott, Paul M. Bradley
The CEOS Cal/Val portal: A new instrument for the Cal/Val community
The exploitation of Earth Observation data depends with increasing importance on multi-source inter-calibrated data, as demonstrated, for example, in the ESA DUE GlobColour project.1 The subgroup on Calibration and Validation of the Committee on Earth Observing System (CEOS) formulated a recommendation during the plenary session held in China at the end of 2004, with the goal of setting-up and ope
Authors
Alessandro Burini, Nigel Fox, Gyanesh Chander, P. Goryl
Contamination of groundwater by the fumigants ethylene dibromide (EDB) and dibromochloropropane (DBCP) near McBee, South Carolina
McBee is a small town of about 700 people located in Chesterfield County, South Carolina, in the Sandhills region of the upper Coastal Plain. The halogenated organic compounds ethylene dibromide (EDB) and dibromochloropropane (DBCP) have been detected in several public and domestic supply and irrigation wells since 2002 at concentrations above their U.S. Environmental Protection Agency Maximum Con
Authors
James Landmeyer, Bruce G. Campbell
Importance of record length with respect to estimating the 1-percent chance flood
U.S. Geological Survey (USGS) streamflow gages have been established in every State in the Nation, Puerto Rico, and the Trust Territory of the Pacific Islands. From these st reamflow records, estimates of the magnitude and frequency of floods are often developed and used to design transportation and water- conveyance structures to protect lives and property, and to determine flood-insurance rates.
Authors
Toby D. Feaster
Preliminary assessment of several parameters to measure and compare usefulness of the CEOS reference pseudo-invariant calibration sites
Test sites are central to any future quality assurance and quality control (QA/QC) strategy. The Committee on Earth Observation Satellites (CEOS) Working Group for Calibration and Validation (WGCV) Infrared Visible Optical Sensors (IVOS) worked with collaborators around the world to establish a core set of CEOS-endorsed, globally distributed, reference standard test sites (both instrumented and ps
Authors
Gyanesh Chander, Amit Angal, Xiaoxiong Xiong, Dennis L. Helder, Nischal Mishra, Taeyoung Choi, Aisheng Wu
Geochemistry of Eagle Ford group source rocks and oils from the first shot field area, Texas
Total organic carbon, Rock-Eval pyrolysis, and vitrinite reflectance analyses performed on Eagle Ford Group core and cuttings samples from the First Shot field area, Texas demonstrate these samples have sufficient quantity, quality, and maturity of organic matter to have generated oil. Furthermore, gas chromatography and biomarker analyses performed on Eagle Ford Group oils and source rock extract
Authors
Janell D. Edman, Janet K. Pitman