Relationships of field habitat measurements, visual habitat indices, and land cover to benthic macroinvertebrates in urbanized streams of the Santa Clara Valley, California
S.V. Fend, J.L. Carter, F.R. Kearns
2005, American Fisheries Society Symposium (2005) 193-212
We evaluated several approaches for measuring natural and anthropogenic habitat characteristics to predict benthic macroinvertebrate assemblages over a range of urban intensity at 85 stream sites in the Santa Clara Valley, California. Land cover was summarized as percentage urban land cover and impervious area within upstream buffers and the upstream...
Effects of coal-bed methane discharge waters on the vegetation and soil ecosystem in Powder River Basin, Wyoming
M. Stearns, J.A. Tindall, G. Cronin, M.J. Friedel, E. Bergquist
2005, Water, Air, & Soil Pollution (168) 33-57
Coal-bed methane (CBM) co-produced discharge waters in the Powder River Basin of Wyoming, resulting from extraction of methane from coal seams, have become a priority for chemical, hydrological and biological research during the last few years. Soil and vegetation samples were taken from affected and reference sites (upland elevations...
A multivariate study of mangrove morphology (Rhizophora mangle) using both above and below-water plant architecture
R. A. Brooks, S.S. Bell
2005, Estuarine, Coastal and Shelf Science (65) 440-448
A descriptive study of the architecture of the red mangrove, Rhizophora mangle L., habitat of Tampa Bay, FL, was conducted to assess if plant architecture could be used to discriminate overwash from fringing forest type. Seven above-water (e.g., tree height, diameter at breast height, and leaf area) and 10 below-water...
Comparison of constitutive flow resistance equations based on the Manning and Chezy equations applied to natural rivers
David M. Bjerklie, S. Lawrence Dingman, Carl H. Bolster
2005, Water Resources Research (41)
A set of conceptually derived in‐bank river discharge–estimating equations (models), based on the Manning and Chezy equations, are calibrated and validated using a database of 1037 discharge measurements in 103 rivers in the United States and New Zealand. The models are compared to a multiple regression model...
Incorporating uncertainty in watershed management decision-making: A mercury TMDL case study
W. Labiosa, J. Leckie, R. Shachter, D. Freyberg, J. Rytuba
Moglen G.E., editor(s)
2005, Conference Paper, Proceedings of the 2005 Watershed Management Conference - Managing Watersheds for Human and Natural Impacts: Engineering, Ecological, and Economic Challenges
Water quality impairment due to high mercury fish tissue concentrations and high mercury aqueous concentrations is a widespread problem in several sub-watersheds that are major sources of mercury to the San Francisco Bay. Several mercury Total Maximum Daily Load regulations are currently being developed to address this problem. Decisions about...
Multivariate analysis of scale-dependent associations between bats and landscape structure
P. M. Gorresen, M. R. Willig, R. E. Strauss
2005, Ecological Applications (15) 2126-2136
The assessment of biotic responses to habitat disturbance and fragmentation generally has been limited to analyses at a single spatial scale. Furthermore, methods to compare responses between scales have lacked the ability to discriminate among patterns related to the identity, strength, or direction of associations of biotic variables with landscape...
Viscoelasticity, postseismic slip, fault interactions, and the recurrence of large earthquakes
A.J. Michael
2005, Bulletin of the Seismological Society of America (95) 1594-1603
The Brownian Passage Time (BPT) model for earthquake recurrence is modified to include transient deformation due to either viscoelasticity or deep post seismic slip. Both of these processes act to increase the rate of loading on the seismogenic fault for some time after a large event. To approximate these effects,...
Bulk sediment Qp and Qs in the Mississippi embayment, central United States
C.A. Langston, P. Bodin, C. Powell, M. Withers, S. Horton, Walter D. Mooney
2005, Bulletin of the Seismological Society of America (95) 2162-2179
We have estimated P-wave and S-wave anelastic attenuation coefficients for the thick, unconsolidated sediments of the Mississippi embayment, central United States, using the spectral distance decay of explosion P and Rayleigh waves. The sediment-trapped P wave, Psed, is observed to ranges of 80 km at 10 Hz, and 1-Hz Rayleigh waves are observed out to 130 km...
Indoor radon risk potential of Hawaii
G.M. Reimer, S.L. Szarzi
2005, Journal of Radioanalytical and Nuclear Chemistry (264) 365-369
A comprehensive evaluation of radon risk potential in the State of Hawaii indicates that the potential for Hawaii is low. Using a combination of factors including geology, soils, source-rock type, soil-gas radon concentrations, and indoor measurements throughout the state, a general model was developed that permits prediction for various regions...
Application of wavelet analysis for monitoring the hydrologic effects of dam operation: Glen canyon dam and the Colorado River at lees ferry, Arizona
M.A. White, J. C. Schmidt, D.J. Topping
2005, River Research and Applications (21) 551-565
Wavelet analysis is a powerful tool with which to analyse the hydrologic effects of dam construction and operation on river systems. Using continuous records of instantaneous discharge from the Lees Ferry gauging station and records of daily mean discharge from upstream tributaries, we conducted wavelet analyses of the hydrologic structure...
Biochemical effects of lead, zinc, and cadmium from mining on fish in the Tri-States district of northeastern Oklahoma, USA
Christopher J. Schmitt, Jeffrey J. Whyte, William G. Brumbaugh, Donald E. Tillitt
2005, Environmental Toxicology and Chemistry (24) 1483-1495
We assessed the exposure of fish from the Spring and Neosho Rivers in northeast Oklahoma, USA, to lead, zinc, and cadmium from historical mining in the Tri-States Mining District (TSMD). Fish (n = 74) representing six species were collected in October 2001 from six sites on the Spring and Neosho...
The effects of sea level and palaeotopography on lithofacies distribution and geometries in heterozoan carbonates, south-eastern Spain
C.L. Johnson, E. K. Franseen, R.H. Goldstein
2005, Sedimentology (52) 513-536
This study utilized three-dimensional exposures to evaluate how sea-level position and palaeotopography control the facies and geometries of heterozoan carbonates. Heterozoan carbonates were deposited on top of a Neogene volcanic substrate characterized by palaeotopographic highs, palaeovalleys, and straits that were formed by subaerial erosion, possibly original volcanic topography, and faults...
Glacially-influenced late Pleistocene stratigraphy of a passive margin: New Jersey's Record of the North American ice sheet
J.S. Carey, R. E. Sheridan, G.M. Ashley, J. Uptegrove
2005, Marine Geology (218) 155-173
Glacial isostasy and the sediment supply changes associated with the waxing and waning of ice sheets have dramatic effects on the stratigraphy of adjacent continental shelves. In ancient stratigraphic records, the glacial influences on such deposits could be difficult to recognize because of the removal of coeval terrestrial glacial deposits...
A moving hum filter to suppress rotor noise in high-resolution airborne magnetic data
J. Xia, W.E. Doll, R. D. Miller, T.J. Gamey, A.M. Emond
2005, Geophysics (70)
A unique filtering approach is developed to eliminate helicopter rotor noise. It is designed to suppress harmonic noise from a rotor that varies slightly in amplitude, phase, and frequency and that contaminates aero-magnetic data. The filter provides a powerful harmonic noise-suppression tool for data acquired with modern large-dynamic-range recording systems....
A map overlay error model based on boundary geometry
D. Gaeuman, J. Symanzik, J. C. Schmidt
2005, Geographical Analysis (37) 350-369
An error model for quantifying the magnitudes and variability of errors generated in the areas of polygons during spatial overlay of vector geographic information system layers is presented. Numerical simulation of polygon boundary displacements was used to propagate coordinate errors to spatial overlays. The model departs from most previous error...
Integrating seismic reflection and geological data and interpretations across an internal basement massif: The southern Appalachian Pine Mountain window, USA
J.H. McBride, R. D. Hatcher Jr., W. J. Stephenson, R.J. Hooper
2005, Geological Society of America Bulletin (117) 669-686
The southern Appalachian Pine Mountain window exposes 1.1 Ga Grenvillian basement and its metasedimentary Paleozoic(?) cover through the allochthonous Inner Piedmont. The issue of whether the crustal block inside the window was either transported above the master Appalachian (late Alleghanian) de??collement or is an autochthonous block that was overridden by...
DUCKS: Low cost thermal monitoring units for near-vent deployment
A. Harris, D. Pirie, K. Horton, H. Garbeil, E. Pilger, H. Ramm, R. Hoblitt, C. Thornber, M. Ripepe, E. Marchetti, P. Poggi
2005, Journal of Volcanology and Geothermal Research (143) 335-360
During 1999 we designed and tested a thermal monitoring system to provide a cheap, robust, modular, real-time system capable of surviving the hostile conditions encountered proximal to active volcanic vents. In November 2000 the first system was deployed at Pu'u...
A spatial model of potential jaguar habitat in Arizona
J.R. Hatten, A. Averill-Murray, W.E. van Pelt
2005, Journal of Wildlife Management (69) 1024-1033
The jaguar (Panthera onca) is an endangered species that occasionally visits the southwestern United States from Mexico. The number of jaguar sightings per decade has declined over the last 100 years in Arizona, USA, raising conservation concerns for the species at a local and national level. In 1997, state, federal,...
Effects of urban development in the Puget Lowland, Washington, on interannual streamflow patterns: Consequences for channel form and streambed disturbance
Christopher P. Konrad, Derek B. Booth, Stephen J. Burges
2005, Water Resources Research (41)
Recovery and protection of streams in urban areas depend on a comprehensive understanding of how human activities affect stream ecosystems. The hydrologic effects of urban development and the consequences for stream channel form and streambed stability were examined in 16 streams in the Puget Lowland, Washington, using three streamflow metrics...
Baseline models of trace elements in major aquifers of the United States
L. Lee, D. Helsel
2005, Applied Geochemistry (20) 1560-1570
Trace-element concentrations in baseline samples from a survey of aquifers used as potable-water supplies in the United States are summarized using methods appropriate for data with multiple detection limits. The resulting statistical distribution models are used to develop summary statistics and estimate probabilities of exceeding water-quality standards. The models are...
Preliminary characterisation of new glass reference materials (GSA-1G, GSC-1G, GSD-1G and GSE-1G) by laser ablation-inductively coupled plasma-mass spectrometry using 193 nm, 213 nm and 266 nm wavelengths
M. Guillong, K. Hametner, E. Reusser, Stephen A. Wilson, D. Gunther
2005, Geostandards and Geoanalytical Research (29) 315-331
New glass reference materials GSA-1G, GSC-1G, GSD-1G and GSE-1G have been characterised using a prototype solid state laser ablation system capable of producing wavelengths of 193 nm, 213 nm and 266 nm. This system allowed comparison of the effects of different laser wavelengths under nearly identical ablation and ICP operating...
Karst database development in Minnesota: Design and data assembly
Y. Gao, E.C. Alexander Jr., R.G. Tipping
2005, Environmental Geology (47) 1072-1082
The Karst Feature Database (KFD) of Minnesota is a relational GIS-based Database Management System (DBMS). Previous karst feature datasets used inconsistent attributes to describe karst features in different areas of Minnesota. Existing metadata were modified and standardized to represent a comprehensive metadata for all the karst features in Minnesota. Microsoft...
Modeling downstream fining in sand-bed rivers. II: Application
S. Wright, G. Parker
2005, Journal of Hydraulic Research (43) 621-631
In this paper the model presented in the companion paper, Wright and Parker (2005) is applied to a generic river reach typical of a large, sand-bed river flowing into the ocean in order to investigate the mechanisms controlling longitudinal profile development and downstream fining. Three mechanisms which drive downstream fining...
Rapid tsunami models and earthquake source parameters: Far-field and local applications
E.L. Geist
2005, ISET Journal of Earthquake Technology (42) 127-136
Rapid tsunami models have recently been developed to forecast far-field tsunami amplitudes from initial earthquake information (magnitude and hypocenter). Earthquake source parameters that directly affect tsunami generation as used in rapid tsunami models are examined, with particular attention to local versus far-field application of those models. First, validity of the...
Model uncertainties of the 2002 update of California seismic hazard maps
T. Cao, M.D. Petersen, A.D. Frankel
2005, Bulletin of the Seismological Society of America (95) 2040-2057
In this article we present and explore the source and ground-motion model uncertainty and parametric sensitivity for the 2002 update of the California probabilistic seismic hazard maps. Our approach is to implement a Monte Carlo simulation that allows for independent sampling from fault to fault in each simulation. The source-distance...
