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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.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 1,000 books authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 971
Land remote sensing and global environmental change: NASA's Earth observing system and the science of ASTER and MODIS
No abstract available.
Authors
Bhaskar Ramachandran, Christopher O. Justice, Michael J. Abrams
A new strategy for developing Vs30 maps
Despite obvious limitations as a proxy for site amplification, the use of time-averaged shear-wave velocity over the top 30m (Vs30) is useful and widely practiced, most notably through its use as an explanatory variable in ground motion prediction equations (and thus hazard maps and ShakeMaps, among other applications). Local, regional, and global Vs30 maps thus have diverse and fundamental uses i
Authors
David J. Wald, Leslie McWhirter, Eric Thompson, Amanda S. Hering
Advances in hyperspectral remote sensing of vegetation and agricultural croplands
Recent advances in hyperspectral remote sensing (or imaging spectroscopy) demonstrate a great utility for a variety of land monitoring applications. It is now possible to be diagnostic in sensing species and plant communities using remotely sensed data and to do so in a direct and informed manner using modern tools and analyses. Hyperspectral data analyses are superior to traditional broadband ana
Authors
Prasad S. Thenkabail, John G. Lyon, Alfredo Huete
An adaptive approach to invasive plant management on U.S. Fish and Wildlife Service-owned native prairies in the Prairie Pothole Region: decision support under uncertainity
Much of the native prairie managed by the U.S. Fish and Wildlife Service (Service) in the Prairie Pothole Region (PPR) is extensively invaded by the introduced cool-season grasses smooth brome (Bromus inermis) and Kentucky bluegrass (Poa pratensis). The central challenge to managers is selecting appropriate management actions in the face of biological and environmental uncertainties. We describe t
Authors
Jill J. Gannon, Clinton T. Moore, Terry L. Shaffer, Bridgette Flanders-Wanner
Clinical pathology results from cranes with experimental West Nile Virus infection
Sandhill cranes (Grus canadensis) were vaccinated for and then challenged with West Nile virus. Resulting titers demonstrated protection in the vaccinated-challenged cranes as compared to the unvaccinated-challenged cranes. Clinical pathology results showed challenged cranes, whether vaccinated or not, had a decrease in their hematocrits and an elevation of 2.5-fold in their white blood cell count
Authors
Glenn H. Olsen
Hyperspectral remote sensing of vegetation
Hyperspectral narrow-band (or imaging spectroscopy) spectral data are fast emerging as practical solutions in modeling and mapping vegetation. Recent research has demonstrated the advances in and merit of hyperspectral data in a range of applications including quantifying agricultural crops, modeling forest canopy biochemical properties, detecting crop stress and disease, mapping leaf chlorophyll
Authors
Prasad S. Thenkabail, John G. Lyon, Alfredo Huete
Long-period earthquake simulations in the Wasatch Front, UT: misfit characterization and ground motion estimates
In this research we characterize the goodness-of-fit between observed and synthetic seismograms from three small magnitude (M3.6-4.5) earthquakes in the region using the Wasatch Front community velocity model (WCVM) in order to determine the ability of the WCVM to predict earthquake ground motions for scenario earthquake modeling efforts. We employ the goodness-of-fit algorithms and criteria of Ol
Authors
Morgan P. Moschetti, Leonardo Ramírez-Guzmán
Monitoring soil geochemistry in the urban environment: A comparison of studies in 1972 and 2005 in Denver, Colorado
No abstract available
Authors
David B. Smith, Karl J. Ellefsen, Ronald G. Garrett, L. Graham Closs
Nearshore disposal of fine-grained sediment in a high-energy environment: Santa Cruz Harbor case study
Current regulations in California prohibit the disposal of more than 20% fine-grained sediment in the coastal zone; this threshold is currently being investigated to determine if this environmental regulation can be improved upon. A field monitoring and numerical modeling experiment took place late 2 009 to determine the fate of fine-grained dredge disposal material from Santa Cruz Harbor, Califor
Authors
Katherine Cronin, Maarten van Ormondt, Curt D. Storlazzi, Katherine Presto, Pieter K. Tonnon
Offshore sand-shoal development and evolution of Petit Bois Pass, Mississippi-Alabama Barrier Islands, Mississippi, USA
Assessment of recently collected geophysical and sediment-core data identifies an extensive shoal field located off Dauphin and Petit Bois Islands. The shoals are the product of Pleistocene fluvial deposition and Holocene marine-transgressive processes, and their position and orientation oblique to the modern shoreline has been stable over the past century. The underlying stratigraphy has also inf
Authors
James G. Flocks, Kyle W. Kelso, Gregory C. Twichell, Noreen A. Buster, John N. Baehr