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164511 results.

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Page 6580, results 164476 - 164500

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Not all publications have extents, not all extents are completely accurate
Relationship between remotely-sensed vegetation indices, canopy attributes and plant physiological processes: What vegetation indices can and cannot tell us about the landscape
Edward P. Glenn, Alfredo R Huete, Pamela L. Nagler, Stephen G. Nelson
None, Sensors (8) 2136-2160
Vegetation indices (VIs) are among the oldest tools in remote sensing studies. Although many variations exist, most of them ratio the reflection of light in the red and NIR sections of the spectrum to separate the landscape into water, soil, and vegetation. Theoretical analyses and field studies have shown that...
Reconciling environmental and flood control goals on an arid-zone river: Case study of the Limitrophe Region of the lower Colorado River in the United States and Mexico
Edward P. Glenn, Kate Hucklebridge, Osvel Hinojosa-Huerta, Pamela L. Nagler, Jennifer Pitt
None, Environmental Management (41) 322-335
Arid zone rivers have highly variable flow rates, and flood control projects are needed to protect adjacent property from flood damage. On the other hand, riparian corridors provide important wildlife habitat, especially for birds, and riparian vegetation is adapted to the natural variability in flows on these rivers. While environmental...
Cross-borehole flow tests and insights into hydraulic connections in fractured mudstone and sandstone
John Williams, Pierre Lacombe, Carole D. Johnson, Frederick L. Paillet
None, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems
Cross-borehole flow tests provided insights into hydraulic connections in fractured and dipping mudstone and sandstone that were consistent with the lithostratigraphic and structural framework of a VOCcontaminated bedrock research site in west-central New Jersey. Two cross-borehole flow tests were completed. Each test involved measurement and analysis of transient flow in...
Comparative analysis of GPP products estimated from an empirical model and MODIS
Li Zhang, Bruce K. Wylie, Thomas Loveland, Lei Ji
None, Conference Paper, Global priorities in land remote sensing
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)...
Characterizing the two-dimensional thermal conductivity distribution in a sand and gravel aquifer
Jeff M. Markle, Robert A. Schincariol, J.H. Sass, John W. Molson
None, Soil Science Society of America Journal (70) 1281-1294
Both hydrologic and thermal transport properties play a significant role in the movement of heat through permeable sedimentary material; however, the thermal conductivity is rarely characterized in detailed spatial resolution. As part of a study of the movement of thermal plumes through a sand and gravel aquifer, we have constructed...
Scouting craton’s edge in Paleo-Pacific Gondwana
Carol A. Finn, John W. Goodge, Detlef Damaske, C. Mark Fanning
Dieter Karl Futterer, Georg Kleinschmidt, Hubert Miller, Franz Tessensohn, editor(s)
None, Book chapter, Antarctica: Contributions to global earth sciences
The geology of the ice-covered interior of the East Antarctic shield is completely unknown; inferences about its composition and history are based on extrapolating scant outcrops from the coast inland. Although the shield is clearly composite in nature, a large part of its interior has been represented by a single...
Remnant damage from the 1906 San Francisco earthquake
John Boatwright
Carol S. Prentice, Judith G. Scotchmoor, Eldridge M. Moores, Jon P. Kiland, editor(s)
None, Book chapter, 1906 San Francisco earthquake centennial field guides: Field trips associated with the 100th Anniversary Conference, 18–23 April 2006, San Francisco, California
This field trip consists of two stops at locations where it is possible to see damage from the 1906 earthquake and to gauge the intensity of the ground shaking that caused the damage. The first stop is at a cemetery in Colma, where the damage to monuments and headstones was...
Development of stochastic modeling systems using deterministic models and GIS: Principles and a case study in the Atlantic Zone of Costa Rica
Shuguang Liu, William A. Reiners, Kenneth G. Gerow, David S Schimel, Michael Keller
None, Conference Paper
The most important requirements for large-area environmental modeling are a tight integration between models and data, and a close match of the spatial scale at which the model is developed with the scale at which the model is to be applied. To better match the scale of data with that...
Integrated geophysical characterization of the Winthrop Landfill Southern Flow Path, Winthrop, Maine
Cian B. Dawson, John W. Lane Jr., Eric A. White, Marcel Belaval
None, Conference Paper, Proceedings: Symposium on the application of geophysics to engineering and environmental problems
The U.S. Geological Survey (USGS), in cooperation with United Technologies Corporation, used an integrated suite of borehole, surface, and water-borne geophysical methods near the site of the former Winthrop Landfill, Winthrop, Maine, to investigate the hydrogeology controlling the transport of leachate from the landfill to nearby Annabessacook Lake. During the...
Perspectives on the diagnosis, epizootiology, and control of the 1973 duck plague epizootic in wild waterfowl at Lake Andes, South Dakota
Gary L. Pearson, Delmar R. Cassidy
None, Journal of Wildlife Diseases (33 ) 681-705
An epizootic of duck plague occurred in early 1973 in a population of 163,500 wild waterfowl, primarily mallards (Anas platyrhynchos), wintering on Lake Andes and the nearby Missouri River in southeastern South Dakota (USA). The diagnosis was based on pathologic lesions and confirmed by virus isolation. Control measures included quarantine, attempts...
Exsolved magmatic fluid and its role in the formation of comb-layered quartz at the Cretaceous Logtung W-Mo deposit, Yukon Territory, Canada
Jacob B. Lowenstern, W. David Sinclair
None, Book chapter, The Third Hutton symposium on the origin of granites and related rocks
Comb-layered quartz is a type of unidirectional solidification texture found at the roofs of shallow silicic intrusions that are often associated spatially with Mo and W mineralisation. The texture consists of multiple layers of euhedral, prismatic quartz crystals (Type I) that have grown on subplanar aplite substrates. The layers are...
Geodetic monitoring of the southern San Andreas Fault, California, 1980-1991
James C. Savage, Michael Lisowski
None, Journal of Geophysical Research (100) 8185-8192
Five geodetic arrays (10 to 40 km aperture) located along the San Andreas fault have been surveyed frequently (several times in most years) over the 1980–1991 interval to detect possible fluctuations in the deformation rate. In each survey of an array the distances between the same four to seven pairs...
The ecology of Humboldt Bay, California, an estuarine profile
R.A. Barnhart, M.J. Boyd, J.E. Pequegnat
None, Report
Synthesizes data on the ecological relationships and functions of the estuary, including information on physical aspects of the bay environment; describes the biotic communities and their relationships; provides management considerations in terms including environmental concerns; and identifies research and management information gaps. Portions of the bay are managed as a national wildlife...
Storm‐dominated bottom boundary layer dynamics on the Northern California Continental Shelf: Measurements and predictions
D.A. Cacchione, W.D. Grant, D.E. Drake, S.M. Glenn
None, Journal of Geophysical Research C: Oceans (92) 1817-1827
Measurements of near‐bottom velocity profiles in 85 m water depth during a storm on the continental shelf off northern California using the GEOPROBE tripod in December 1979 provided estimates of shear velocities, , and roughness lengths, , when the near‐bottom velocity profiles were logarithmic. These estimates agree within 90% confidence...
Vegetation pattern on channel features in the Passage Creek Gorge, Virginia
Cliff R. Hupp
None, Castanea (48) 62-72
Persistent distribution patterns of woody vegetation within the bottomland forest of Passage Creek, Virginia, were related to fluvial landforms, channel geometry, streamflow characteristics, and sediment-size characteristics. Vegetation patterns were determined from species presence as observed in...
Relations between geological structure and aeromagnetic anomalies in central Nevada
Edwin S. Robinson
None, Bulletin of the Geological Society of America (81) 2045-2060
An aeromagnetic survey of a 6000-km2 area in central Nevada has been complied by the U.S. Geological Survey. An interpretation of the aeromagnetic data is developed to establish relations between near-surface geological features and structure extending to intermediate depths in the crust.A three-dimensional distribution of magnetized material is described which would...