Aseismic slip and fault-normal strain along the central creeping section of the San Andreas fault
F. Rolandone, R. Burgmann, D.C. Agnew, I.A. Johanson, D.C. Templeton, M. A. d'Alessio, S.J. Titus, C. DeMets, B. Tikoff
2008, Geophysical Research Letters (35)
We use GPS data to measure the aseismic slip along the central San Andreas fault (CSAF) and the deformation across adjacent faults. Comparison of EDM and GPS data sets implies that, except for small-scale transients, the fault motion has been steady over the last 40 years. We add 42 new...
Integrating remotely acquired and field data to assess effects of setback levees on riparian and aquatic habitat in glacial-melt water rivers
C.P. Konrad, R. W. Black, F. Voss, C. M. U. Neale
2008, River Research and Applications (24) 355-372
Setback levees, in which levees are reconstructed at a greater distance from a river channel, are a promising restoration technique particularly for alluvial rivers with broad floodplains where river-floodplain connectivity is essential to ecological processes. Documenting the ecological outcomes of restoration activities is essential for assessing the comparative benefits of...
Hawaiian cultural influences on support for lava flow hazard mitigation measures during the January 1960 eruption of Kīlauea volcano, Kapoho, Hawai‘i
Chris E. Gregg, Bruce F. Houghton, Douglas Paton, D. A. Swanson, R. Lachman, W.J. Bonk
2008, Journal of Volcanology and Geothermal Research (172) 300-307
In 1960, Kīlauea volcano in Hawaii erupted, destroying most of the village of Kapoho and forcing evacuation of its approximately 300 residents. A large and unprecedented social science survey was undertaken during the eruption to develop an understanding of human behavior, beliefs, and coping strategies among the adult evacuees...
Geophysical data integration, stochastic simulation and significance analysis of groundwater responses using ANOVA in the Chicot Aquifer system, Louisiana, USA
A. Rahman, F.T.-C. Tsai, C.D. White, D.A. Carlson, C. S. Willson
2008, Hydrogeology Journal (16) 749-764
Data integration is challenging where there are different levels of support between primary and secondary data that need to be correlated in various ways. A geostatistical method is described, which integrates the hydraulic conductivity (K) measurements and electrical resistivity data to better estimate the K distribution in the Upper Chicot...
Using demography and movement behavior to predict range expansion of the southern sea otter.
M. T. Tinker, D.F. Doak, J. A. Estes
2008, Ecological Applications (18) 1781-1794
In addition to forecasting population growth, basic demographic data combined with movement data provide a means for predicting rates of range expansion. Quantitative models of range expansion have rarely been applied to large vertebrates, although such tools could be useful for restoration and management of many threatened but recovering populations....
Alien dominance of the parasitoid wasp community along an elevation gradient on Hawai'i Island
R.W. Peck, P.C. Banko, M. Schwarzfeld, M. Euaparadorn, K.W. Brinck
2008, Biological Invasions (10) 1441-1455
Through intentional and accidental introduction, more than 100 species of alien Ichneumonidae and Braconidae (Hymenoptera) have become established in the Hawaiian Islands. The extent to which these parasitoid wasps have penetrated native wet forests was investigated over a 1,765 m elevation gradient on windward Hawai'i Island. For >1 year, malaise...
Landsat continuity: Issues and opportunities for land cover monitoring
M.A. Wulder, Joanne C. White, S.N. Goward, J. G. Masek, J. R. Irons, M. Herold, W.B. Cohen, Thomas R. Loveland, C. E. Woodcock
2008, Remote Sensing of Environment (112) 955-969
Initiated in 1972, the Landsat program has provided a continuous record of earth observation for 35 years. The assemblage of Landsat spatial, spectral, and temporal resolutions, over a reasonably sized image extent, results in imagery that can be processed to represent land cover over large areas with an amount of spatial...
Utilizing geochemical, hydrologic, and boron isotopic data to assess the success of a salinity and selenium remediation project, Upper Colorado River Basin, Utah
D. L. Naftz, T.D. Bullen, Bernard J. Stolp, C.D. Wilkowske
2008, Science of the Total Environment (392) 1-11
Stream discharge and geochemical data were collected at two sites along lower Ashley Creek, Utah, from 1999 to 2003, to assess the success of a site specific salinity and Se remediation project. The remediation project involved the replacement of a leaking sewage lagoon system that was interacting with Mancos Shale...
Comparison of remote sensing image processing techniques to identify tornado damage areas from Landsat TM data
S.W. Myint, M. Yuan, R.S. Cerveny, C.P. Giri
2008, Sensors (8) 1128-1156
Remote sensing techniques have been shown effective for large-scale damage surveys after a hazardous event in both near real-time or post-event analyses. The paper aims to compare accuracy of common imaging processing techniques to detect tornado damage tracks from Landsat TM data. We employed the direct change detection approach using...
A review of the endemic Hawaiian Drosophilidae and their host plants
K.N. Magnacca, D. Foote, P. M. O’Grady
2008, Zootaxa 1-58
The Hawaiian Drosophilidae is one of the best examples of rapid speciation in nature. Nearly 1,000 species of endemic drosophilids have evolved in situ in Hawaii since a single colonist arrived over 25 million years ago. A number of mechanisms, including ecological adaptation, sexual selection, and geographic isolation, have been...
Gas and gas hydrate distribution around seafloor seeps in Mississippi Canyon, Northern Gulf of Mexico, using multi-resolution seismic imagery
W.T. Wood, P. E. Hart, D. R. Hutchinson, N. Dutta, F. Snyder, R.B. Coffin, J.F. Gettrust
2008, Marine and Petroleum Geology (25) 952-959
To determine the impact of seeps and focused flow on the occurrence of shallow gas hydrates, several seafloor mounds in the Atwater Valley lease area of the Gulf of Mexico were surveyed with a wide range of seismic frequencies. Seismic data were acquired with a deep-towed, Helmholz resonator source (220-820...
Detection of foliage-obscured vehicle using a multiwavelength polarimetric lidar
S. Tan, J. Stoker, S. Greenlee
2008, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
Foliage obscured man-made targets detection and identification is of great interest to many applications. In this paper, the backscattered laser signals from a multiwavelength polarimetric lidar were used to detect a vehicle hidden inside a vegetated area. The polarimetric reflectance data from the lidar at two separate laser wavelengths at...
Longitudinal gradients along a reservoir cascade
L.E. Miranda, M.D. Habrat, S. Miyazono
2008, Transactions of the American Fisheries Society (137) 1851-1865
Reservoirs have traditionally been regarded as spatially independent entities rather than as longitudinal segments of a river system that are connected upstream and downstream to the river and other reservoirs. This view has frustrated advancement in reservoir science by impeding adequate organization of available information and by hindering interchanges with...
Effectiveness of lethal, directed wolf-depredation control in Minnesota
E. K. Harper, W.J. Paul, L.D. Mech, S. Weisberg
2008, Journal of Wildlife Management (72) 778-784
Wolf (Canis lupus) depredations on livestock in Minnesota, USA, are an economic problem for many livestock producers, and depredating wolves are lethally controlled. We sought to determine the effectiveness of lethal control through the analysis of data from 923 government-verified wolf depredations from 1979 to 1998. We analyzed the data...
The effect of terrace geology on ground-water movement and on the interaction of ground water and surface water on a mountainside near Mirror Lake, New Hampshire, USA
T. C. Winter, D.C. Buso, P.C. Shattuck, P. T. Harte, D.A. Vroblesky, D.J. Goode
2008, Hydrological Processes (22) 21-32
The west watershed of Mirror Lake in the White Mountains of New Hampshire contains several terraces that are at different altitudes and have different geologic compositions. The lowest terrace (FSE) has 5 m of sand overlying 9 m of till. The two next successively higher terraces (FS2 and FS1) consist...
Application of RHIZON samplers to obtain high-resolution pore-fluid records during geochemical investigations of gas hydrate systems
John W. Pohlman, M Riedel, William F. Waite, K. Rose, L. Lapham
2008, Fire in the Ice: NETL Methane Hydrate Newsletter (8) 16-17
Obtaining accurate, high-resolution profiles of pore fluid constituents is critical for characterizing the subsurface geochemistry of hydrate-bearing sediments. Tightly-constrained downcore profiles provide clues about fluid sources, fluid flow, and the milieu of chemical and diagenetic reactions, all of which are used to interpret where and why gas and gas hydrate...
Seasonal passerine migratory movements over the arid Southwest
Rodney K. Felix, Robert H. Diehl, Janet M. Ruth
2008, Studies in Avian Biology (37) 126-137
Biannually, millions of Neotropical and Nearctic migratory birds traverse the arid southwestern US-Mexico borderlands, yet our knowledge of avian migration patterns and behaviors in this region is extremely limited. To describe the spatial and temporal patterns of migration, we examined echoes from weather surveillance radar sites across the American Southwest...
When desert tortoises are rare: Testing a new protocol for assessing status
Kevin Keith, Kristin H. Berry, James F. Weigand
2008, California Fish and Game (94) 75-97
We developed and tested a new protocol for sampling populations of the desert tortoise, Gopherus agassizii, a state- and federally listed species, in areas where population densities are very low, historical data are sparse, and anthropogenic uses may threaten the well-being of tortoise populations and habitat. We conducted a 3-year...
Levee evaluation using MASW: Preliminary findings from the Citrus Lakefront Levee, New Orleans, Louisiana
John W. Lane Jr., Julian M. Ivanov, Frederick D. Day-Lewis, Drew Clemens, Robert Patev, Richard D. Miller
2008, Conference Paper
The utility of the multi‐channel analysis of surface waves (MASW) seismic method for non‐invasive assessment of earthen levees was evaluated for a section of the Citrus Lakefront Levee, New Orleans, Louisiana. This test was conducted after the New Orleans' area levee system had been stressed by Hurricane Katrina in 2005....
Characterizing submarine ground‐water discharge using fiber‐optic distributed temperature sensing and marine electrical resistivity
Rory Henderson, Frederick D. Day-Lewis, John W. Lane Jr., Charles F. Harvey, Lanbo Liu
2008, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2008
Submarine ground‐water discharge (SGD) contributes important solute fluxes to coastal waters. Pollutants are transported to coastal ecosystems by SGD at spatially and temporally variable rates. New approaches are needed to characterize the effects of storm‐event, tidal, and seasonal forcing on SGD. Here, we evaluate the utility of two geophysical methods‐fiber‐optic...
Estimation of bedrock depth using the horizontal‐to‐vertical (H/V) ambient‐noise seismic method
John W. Lane Jr., Eric A. White, Gregory V. Steele, James C. Cannia
2008, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2008
Estimating sediment thickness and the geometry of the bedrock surface is a key component of many hydrogeologic studies. The horizontal‐to‐vertical (H/V) ambient‐noise seismic method is a novel, non‐invasive technique that can be used to rapidly estimate the depth to bedrock. The H/V method uses a single, broad‐band three‐component seismometer to...
Key elements of regional seismic velocity models for long period ground motion simulations
T.M. Brocher
2008, Journal of Seismology (12) 217-221
Regional 3-D seismic velocity models used for broadband strong motion simulations must include compressional-wave velocity (Vp), shear-wave velocity (Vs), intrinsic attenuation (Qp, Qs), and density. Vs and Qs are the most important of these parameters because the strongest ground motions are generated chiefly by shear- and surface-wave arrivals. Because Vp...
Controls on mineralisation in the Sierra Foothills gold province, central California, USA: A GIS-based reconnaissance prospectivity analysis
F.P. Bierlein, H.J. Northover, D.I. Groves, R.J. Goldfarb, E.E. Marsh
2008, Australian Journal of Earth Sciences (55) 61-78
The assessment of spatial relationships between the location, abundance and size of orogenic-gold deposits in the highly endowed Sierra Foothills gold province in California, via the combination of field studies and a GIS-based analysis, illustrates the power of such an approach to the characterisation of important parameters of mineral systems,...
Downflow limestone beds for treatment of net-acidic, oxic, iron-laden drainage from a flooded Anthracite Mine, Pennsylvania, USA: 1. Field evaluation
C.A. Cravotta III, S.J. Ward
2008, Mine Water and the Environment (27) 67-85
Passive-treatment systems that route acidic mine drainage (AMD) through crushed limestone and/or organic-rich substrates have been used to remove the acidity and metals from various AMD sources, with a wide range of effects. This study evaluates treatment of net-acidic, oxic, iron-laden AMD with limestone alone, and with organic-rich compost layered...
Multiple plagioclase crystal populations identified by crystal size distribution and in situ chemical data: Implications for timescales of magma chamber processes associated with the 1915 eruption of Lassen Peak, CA
M.J. Salisbury, W.A. Bohrson, M.A. Clynne, F.C. Ramos, P. Hoskin
2008, Journal of Petrology (49) 1755-1780
Products of the 1915 Lassen Peak eruption reveal evidence for a magma recharge–magma mixing event that may have catalyzed the eruption and from which four compositional members were identified: light dacite, black dacite, andesitic inclusion, and dark andesite. Crystal size distribution, textural, and in situ chemical (major and trace element...
