Predicting river travel time from hydraulic characteristics
H.E. Jobson
2001, Journal of Hydraulic Engineering (127) 911-918
Predicting the effect of a pollutant spill on downstream water quality is primarily dependent on the water velocity, longitudinal mixing, and chemical/physical reactions. Of these, velocity is the most important and difficult to predict. This paper provides guidance on extrapolating travel-time information from one within bank discharge to another. In...
Hydraulic head applications of flow logs in the study of heterogeneous aquifers
Frederick L. Paillet
2001, Ground Water (39) 667-675
Permeability profiles derived from high-resolution flow logs in heterogeneous aquifers provide a limited sample of the most permeable beds or fractures determining the hydraulic properties of those aquifers. This paper demonstrates that flow logs can also be used to infer the large-scale properties of aquifers surrounding boreholes. The analysis is...
Monitoring wildfire effects: Coming to terms with pseudoreplication
Phillip J. van Mantgem, Mark W. Schwartz, MaryBeth Keifer
2001, Natural Areas Journal (21) 266-273
No abstract available....
Effect of basin physical characteristics on solute fluxes in nine alpine/subalpine basins, Colorado, USA
J.K. Sueker, D. W. Clow, J. N. Ryan, R.D. Jarrett
2001, Hydrological Processes (15) 2749-2769
Alpine/subalpine basins may exhibit substantial variability in solute fluxes despite many apparent similarities in basin characteristics. An evaluation of controls on spatial patterns in solute fluxes may allow development of predictive tools for assessing basin sensitivity to outside perturbations such as climate change or deposition of atmospheric pollutants. Relationships between...
Delineating a recharge area for a spring using numerical modeling, Monte Carlo techniques, and geochemical investigation
R. J. Hunt, J. J. Steuer, M.T.C. Mansor, T.D. Bullen
2001, Ground Water (39) 702-712
Recharge areas of spring systems can be hard to identify, but they can be critically important for protection of a spring resource. A recharge area for a spring complex in southern Wisconsin was delineated using a variety of complementary techniques. A telescopic mesh refinement (TMR) model was constructed from an...
Southern California seismic network: Caltech/USGS element of TriNet 1997-2001
E. Hauksson, P. Small, K. Hafner, R. Busby, R. Clayton, J. Goltz, T. Heaton, K. Hutton, H. Kanamori, J. Polet, D. Given, L.M. Jones, D. Wald
2001, Seismological Research Letters (72) 690-704
No abstract available....
Root proliferation in decaying roots and old root channels: A nutrient conservation mechanism in oligotrophic mangrove forests?
K.L. McKee
2001, Journal of Ecology (89) 876-887
1. In oligotrophic habitats, proliferation of roots in nutrient-rich microsites may contribute to overall nutrient conservation by plants. Peat-based soils on mangrove islands in Belize are characterized by the presence of decaying roots and numerous old root channels (0.1-3.5 cm diameter) that become filled with living and highly branched roots...
Forest impact estimated with NOAA AVHRR and landsat TM data related to an empirical hurricane wind-field distribution
Elijah W. Ramsey III, M.E. Hodgson, S.K. Sapkota, G.A. Nelson
2001, Remote Sensing of Environment (77) 279-292
An empirical model was used to relate forest type and hurricane-impact distribution with wind speed and duration to explain the variation of hurricane damage among forest types along the Atchafalaya River basin of coastal Louisiana. Forest-type distribution was derived from Landsat Thematic Mapper image data, hurricane-impact distribution from a suite...
Seismic-reflection imaging of Tertiary faulting and related post-Eocene deformation 20 km North of Memphis, Tennessee
R. A. Williams, W. J. Stephenson, J. K. Odum, D. M. Worley
2001, Engineering Geology (62) 79-90
Other than the Crittenden County fault zone (CCFZ), little is known about the seismic hazard from earthquake faults within 50 km of Memphis, Tennessee, a city that contains a large inventory of older buildings that are vulnerable to moderate and strong earthquake ground shaking. To address this lack of knowledge...
Pesticides in the hydrologic system - What do we know and what's next?
R. J. Gilliom
2001, Hydrological Processes (15) 3197-3201
Even though the occurrence and behaviour of pesticides in the environment have been studied for decades, water-quality managers and the public still demand more complete and consistent information, and there are many unanswered questions for environmental scientists. In many respects, the greatest potential for unintended adverse effects of pesticides is...
National Wildlife Health Center's Quarterly Mortality Report
K. A. Converse, A. Schrader
2001, Supplement to the Journal of Wildlife Diseases (37)
National Wildlife Health Center's Quarterly Mortality Report
Kimberli J.G. Miller, K. Converse, L. Glaser, A. Schrader
2001, Supplement to the Journal of Wildlife Diseases (37)
Distribution and abundance of the Yuma clapper rail (Rallus longirostris yumanensis) in the Colorado River delta, México
Osvel Hinojosa-Huerta, Stephen DeStefano, William W. Shaw
2001, Journal of Arid Environments (49) 171-182
We estimated the abundance of Yuma clapper rails in the Ciénega de Santa Clara and determined the distribution of the subspecies in the Colorado River delta region in México. The maximum estimate of abundance was 6629 individuals (95% C.I. 4859–8399), assuming a response rate by rails to taped calls of...
Comparison of soil infiltration rates in burned and unburned mountainous watersheds
D.A. Martin, J. A. Moody
2001, Hydrological Processes (15) 2893-2903
Steady-state infiltration measurements were made at mountainous sites in New Mexico and Colorado, USA, with volcanic and granitic soils after wildfires and at comparable unburned sites. We measured infiltration in the New Mexico volcanic soils under two vegetation types, ponderosa pine and mixed conifer, and in the Colorado granitic soils...
Herpetofaunal Inventory and Monitoring at Silverwood Lake State Recreation Area
C. Brown, Robert N. Fisher
2001, Report
No abstract available at this time...
A new lumbriculid genus and species from North America (Clitellata, Lumbriculidae)
S.V. Fend, D.L. Gustafson
2001, Conference Paper, Hydrobiologia
Secubelmis limpida n. sp., n. gen., is described from Montana, U.S.A. The monotypic genus resembles the lumbriculid genera Rhynchelmis and Tatriella in having atria in X, spermathecae in VIII, and semi-prosoporous male ducts. It differs from Tatriella in having paired atria and spermathecae, and from Rhynchelmis in having petiolate atria....
Pathology of brucellosis in bison from Yellowstone National Park
Jack C. Rhyan, T. Gidlewski, T.J. Roffe, K. Aune, L.M. Philo, D.R. Ewalt
2001, Journal of Wildlife Diseases (37) 101-109
Between February 1995 and June 1999, specimens from seven aborted bison (Bison bison) fetuses or stillborn calves and their placentas, two additional placentas, three dead neonates, one 2-wk-old calf, and 35 juvenile and adult female bison from Yellowstone National Park (USA) were submitted for bacteriologic and histopathologic examination. One adult...
The New Madrid seismic zone: Capturing variability in seismic hazard analyses
C.H. Cramer
2001, Seismological Research Letters (72) 664-672
No abstract available....
Status and distribution of the West Indian manatee, Trichechus manatus manatus, in Colombia
R. A. Montoya-Ospina, D. Caicedo-Herrera, S. L. Millan-Sanchez, A. A. Mignucci-Giannoni, L.W. Lefebvre
2001, Biological Conservation (102) 117-129
Historical and recent information on the status and distribution of West Indian manatee, Trichechus manatus manatus, in Colombia was reviewed. Opportunistic and systematic interviews were also conducted. Historical information suggested that the distribution of manatees had been reduced in the Caribbean basin. Manatees can be found in the Atrato, Sinu??,...
Carbon dioxide in magmas and implications for hydrothermal systems
J. B. Lowenstern
2001, Mineralium Deposita (36) 490-502
This review focuses on the solubility, origin, abundance, and degassing of carbon dioxide (CO2) in magma-hydrothermal systems, with applications for those workers interested in intrusion-related deposits of gold and other metals. The solubility of CO2 increases with pressure and magma alkalinity. Its solubility is low relative to that of H2O,...
Statistical self-similarity of width function maxima with implications to floods
S.A. Veitzer, V.K. Gupta
2001, Advances in Water Resources (24) 955-965
Recently a new theory of random self-similar river networks, called the RSN model, was introduced to explain empirical observations regarding the scaling properties of distributions of various topologic and geometric variables in natural basins. The RSN model predicts that such variables exhibit statistical simple scaling, when indexed by Horton-Strahler order....
A model for lignin alteration - Part II: Numerical model of natural gas generation and application to the Piceance Basin, Western Colorado
D.F. Payne, P.J. Ortoleva
2001, Organic Geochemistry (32) 1087-1101
The model presented here simulates a network of parallel and sequential reactions that describe the structural and chemical transformation of lignin-derived sedimentary organic matter (SOM) and the resulting generation of mobile species from shallow burial to approximately low-volatile bituminous rank. The model is calibrated to the Upper Cretaceous Williams Fork...
Reconnaissance geology north of the Hoholitna River, Taylor Mountains D-1 1:63,360-scale quadrangle, southwestern Alaska: A section in Geological studies in Alaska by the U.S. Geological Survey, 1999
Robert B. Blodgett, Frederic H. Wilson
2001, Professional Paper 1633
The lower Paleozoic (Silurian and Ordovician) carbonate stratal succession is divided into six unnamed stratigraphic units in the northern part of the Taylor Mountains D-1 1:63,360-scale quadrangle of southwestern Alaska. Several of these units have previously been recognized in the McGrath and Medfra quadrangles to the northeast in strata of...
Using GIS to analyze animal movements in the marine environment
Philip N. Hooge, William M. Eichenlaub, Elizabeth K. Solomon
Gordon H. Kruse, Nicolas Bez, Anthony Booth, Martin W. Dorn, Susan Hills, Romuald N. Lipcius, Dominique Pelletier, Claude Roy, Stephen J. Smith, David B. Witherell, editor(s)
2001, Conference Paper, Spatial processes and management of marine populations
Advanced methods for analyzing animal movements have been little used in the aquatic research environment compared to the terrestrial. In addition, despite obvious advantages of integrating geographic information systems (GIS) with spatial studies of animal movement behavior, movement analysis tools have not been integrated into GIS for either aquatic or...
Coastal change analysis program implemented in Louisiana
Elijah W. Ramsey III, G.A. Nelson, S.K. Sapkota
2001, Journal of Coastal Research (17) 53-71
Landsat Thematic Mapper images from 1990 to 1996 and collateral data sources were used to classify the land cover of the Mermentau River Basin (MRB) within the Chenier Plain of coastal Louisiana. Landcover classes followed the definition of the National Oceanic and Atmospheric Administration's Coastal Change Analysis Program; however, classification...
