Geophysical Characterization of Pre-Cenozoic Basement for Hydrocarbon Assessment, Yukon Flats, Alaska
R. W. Saltus, J. D. Phillips, R. G. Stanley, A. Till, R. L. Morin
2007, Open-File Report 2007-1208
The Cenozoic basins of interior Alaska are poorly understood, but may host undiscovered hydrocarbon resources in sufficient quantities to serve remote villages and for possible export. Purported oil seeps and the regional occurrence of potential hydrocarbon source and reservoir rocks fuel an exploration interest in the 46,000 km2 Yukon Flats...
Near-Surface Shear Wave Velocity Versus Depth Profiles, VS30, and NEHRP Classifications for 27 Sites in Puerto Rico
Jack K. Odum, Robert A. Williams, William J. Stephenson, David M. Worley, Christa von Hillebrandt-Andrade, Eugenio Asencio, Harold Irizarry, Antonio Cameron
2007, Open-File Report 2007-1174
In 2004 and 2005 the Puerto Rico Seismic Network (PRSN), Puerto Rico Strong Motion Program (PRSMP) and the Geology Department at the University of Puerto Rico-Mayaguez (UPRM) collaborated with the U.S. Geological Survey to study near-surface shear-wave (Vs) and compressional-wave (Vp) velocities in and around major urban areas of Puerto...
Recharge area, base-flow and quick-flow discharge rates and ages, and general water quality of Big Spring in Carter County, Missouri, 2000-04
Jeffrey L. Imes, Niel Plummer, Michael J. Kleeschulte, John G. Schumacher
2007, Scientific Investigations Report 2007-5049
Exploration for lead deposits has occurred in a mature karst area of southeast Missouri that is highly valued for its scenic beauty and recreational opportunities. The area contains the two largest springs in Missouri (Big Spring and Greer Spring), both of which flow into federally designated scenic rivers. Concerns about...
Population viability analysis of Lower Missouri River shovelnose sturgeon with initial application to the pallid sturgeon
P.G. Bajer, M. L. Wildhaber
2007, Journal of Applied Ichthyology (23) 457-464
Demographic models for the shovelnose (Scaphirhynchus platorynchus) and pallid (S. albus) sturgeons in the Lower Missouri River were developed to conduct sensitivity analyses for both populations. Potential effects of increased fishing mortality on the shovelnose sturgeon were also evaluated. Populations of shovelnose and pallid sturgeon were most sensitive to age-0...
Estimation of gonad volume, fecundity, and reproductive stage of shovelnose sturgeon using sonography and endoscopy with application to the endangered pallid sturgeon
J.L. Bryan, M. L. Wildhaber, D. M. Papoulias, A. J. DeLonay, D. E. Tillitt, M.L. Annis
2007, Journal of Applied Ichthyology (23) 411-419
Most species of sturgeon are declining in the Mississippi River Basin of North America including pallid (Scaphirhynchus albus F. and R.) and shovelnose sturgeons (S. platorynchus R.). Understanding the reproductive cycle of sturgeon in the Mississippi River Basin is important in evaluating the status and viability of sturgeon populations. We used non-invasive,...
Effects of nutrient loading and extreme rainfall events on coastal tallgrass prairies: Invasion intensity, vegetation responses, and carbon and nitrogen distribution
E. Siemann, W.E. Rogers, James B. Grace
2007, Global Change Biology (13) 2184-2192
Soil fertility and precipitation are major factors regulating transitions from grasslands to forests. Biotic regulation may influence the effects of these abiotic drivers. In this study, we examined the effects of extreme rainfall events, anthropogenic nutrient loading and insect herbivory on the ability of Chinese tallow tree (Sapium sebiferum) to...
Analysis of salinity intrusion in the Waccamaw River and Atlantic Intracoastal Waterway near Myrtle Beach, South Carolina, 1995-2002
Paul Conrads, Edwin A. Roehl Jr.
2007, Scientific Investigations Report 2007-5110
Six reservoirs in North Carolina discharge into the Pee Dee River, which flows 160 miles through South Carolina to the coastal communities near Myrtle Beach, South Carolina. During the Southeast's record-breaking drought from 1998 to 2003, salinity intrusions inundated a coastal municipal freshwater intake, limiting water supplies. To evaluate the...
Summary of the Ground-Water-Level Hydrologic Conditions in New Jersey 2006
Walter Jones, Daryll Pope
2007, Fact Sheet 2007-3049
Ground water is one of the Nation's most important natural resources. It provides about 40 percent of our Nation's public water supply. Currently, nearly one-half of New Jersey's drinking-water is supplied by over 300,000 wells that serve more than 4.3 million people (John P. Nawyn, U.S. Geological Survey, written commun.,...
Using a remote sensing/GIS model to predict southwestern Willow Flycatcher breeding habitat along the Rio Grande, New Mexico
James R. Hatten, Mark K. Sogge
2007, Open-File Report 2007-1207
Introduction The Southwestern Willow Flycatcher (Empidonax traillii extimus; hereafter SWFL) is a federally endangered bird (USFWS 1995) that breeds in riparian areas in portions of New Mexico, Arizona, southwestern Colorado, extreme southern Utah and Nevada, and southern California (USFWS 2002). Across this range, it uses a variety of plant species as...
Interferometric synthetic-aperature radar (InSAR): Chapter 5
Daniel Dzurisin, Zhong Lu
2007, Book chapter, Volcano deformation - Geodetic monitoring techniques
Geodesists are, for the most part, a patient and hardworking lot. A day spent hiking to a distant peak, hours spent waiting for clouds to clear a line-of-sight between observation points, weeks spent moving methodically along a level line – such is the normal pulse of the geodetic profession. The...
Postfledging survival of Laysan ducks
Michelle H. Reynolds, John J. Citta
2007, Journal of Wildlife Management (71) 383-388
Precise and unbiased estimates of demographic parameters are necessary for effective population monitoring and to parameterize population models (e.g., population viability analyses). This is especially important for endangered species, where recovery planning and managers' decisions can influence species persistence. In this study, we used mark–recapture methods to estimate survival of...
A conceptual life-history model for pallid and shovelnose sturgeon
Mark L. Wildhaber, Aaron J. DeLonay, Diana M. Papoulias, David L. Galat, Robert B. Jacobson, Darin G. Simpkins, P. J. Braaten, Carl E. Korschgen, Michael J. Mac
2007, Circular 1315
Intensive management of the Missouri and Mississippi Rivers has resulted in dramatic physical changes to these rivers. These changes have been implicated as causative agents in the decline of pallid sturgeon. The pallid sturgeon, federally listed as endangered, is endemic to the turbid waters of the Missouri River and the...
Section 4. The GIS Weasel User's Manual
Roland J. Viger, George H. Leavesley
2007, Techniques and Methods 6-B4
INTRODUCTION The GIS Weasel was designed to aid in the preparation of spatial information for input to lumped and distributed parameter hydrologic or other environmental models. The GIS Weasel provides geographic information system (GIS) tools to help create maps of geographic features relevant to a user's model and to generate parameters...
Research activities at U.S. Government agencies in subsurface reactive transport modeling
Randall T. Cygan, Caroline T. Stevens, Robert W. Puls, Steven B. Yabusaki, Robert D. Wauchope, Christian J. McGrath, Gary P. Curtis, Malcolm D. Siegel, Linda A. Veblen, David R. Turner
2007, Vadose Zone Journal (6) 805-822
The fate of contaminants in the environment is controlled by both chemical reactions and transport phenomena in the subsurface. Our ability to understand the significance of these processes over time requires an accurate conceptual model that incorporates the various mechanisms of coupled chemical and physical processes....
Reproductive physiology of Missouri River gravid pallid sturgeon and shovelnose sturgeon during the 2005 and 2006 spawning seasons: Chapter C in Factors affecting the reproduction, recruitment, habitat, and population dynamics of pallid sturgeon and shovelnose sturgeon in the Missouri River
Diana M. Papoulias, Mandy L. Annis, Aaron J. DeLonay, Donald E. Tillitt
2007, Open-File Report 2007-1262-C
In a natural, unaltered river, the location and timing of sturgeon spawning will be dictated by the prevailing environmental conditions to which the sturgeon have adapted. A goal of the Comprehensive Sturgeon Research Program (CSRP; see chap. A) at the U.S. Geological Survey Columbia Environmental Research Center is to identify...
Estimating soil erosion using the USPED model and consecutive remotely sensed land cover observations
Jinxun Liu, Shuguang Liu, Larry L. Tieszen, Mingshi Chen
2007, Conference Paper, SCSC '07: Proceedings of the 2007 summer computer simulation conference
Intensified soil erosion contributes to the degradation of ecosystems. Better estimation of soil erosion across landscapes is a necessary part of understanding ecosystem biogeochemical cycles and ecosystem sustainability. In this study, we used the Unit Stream Power-based Erosion Deposition (USPED) model to estimate the lateral movement of soils across Fort...
Optimization of an ecosystem model through the assimilation of eddy flux observations using a smoothed ensemble Kalman filter
M. Chen, S. Liu, L. Tieszen
2007, Conference Paper
The parameters of ecosystem models are conventionally optimized through nonsequential inversion methods, which treat observations as a whole and lack the flexibility to investigate possible temporal evolution of the model parameters. This research developed a smoothed ensemble Kalman filter (SEnKF) to assess to what extent the parameters and state variables...
Audiomagnetotelluric Data and Two-Dimensional Models from Spring, Snake, and Three Lakes Valleys, Nevada
Darcy McPhee, Bruce A. Chuchel, Louise Pellerin
2007, Open-File Report 2007-1181
Audiomagnetotelluric (AMT) data along thirteen profiles in Spring, Snake, and Three Lakes Valleys, and the corresponding two-dimensional (2-D) inverse models, are presented. The AMT method is a valuable tool for estimating the electrical resistivity of the Earth over depth ranges of a few meters to roughly one kilometer. It is...
Digital outlines and topography of the glaciers of the American West
Andrew G. Fountain, Matthew Hoffman, Keith Jackson, Hassan Basagic, Thomas Nylen, David Percy
2007, Open-File Report 2006-1340
Alpine glaciers have generally receded during the past century (post-“Little Ice Age”) because of climate warming (Oerlemans and others, 1998; Mann and others, 1999; Dyurgerov and Meier, 2000; Grove, 2001). This general retreat has accelerated since the mid 1970s, when a shift in atmospheric circulation occurred (McCabe and Fountain, 1995;...
Geologic Map of the Albuquerque 30' x 60' Quadrangle, North-Central New Mexico
Paul L. Williams (compiler), J. C. Cole
2007, Scientific Investigations Map 2946
The Albuquerque 30' x 60' quadrangle spans the Rio Grande rift between the Colorado Plateau and Great Plains geologic provinces, and includes parts of the Basin and Range and Southern Rocky Mountain physiographic provinces. Geologic units exposed in the quadrangle range in age from Early Proterozoic schist and granite to...
Hydrogeology and Aquifer Storage and Recovery Performance in the Upper Floridan Aquifer, Southern Florida
Ronald S. Reese, Carlos A. Alvarez-Zarikian
2007, Scientific Investigations Report 2006-5239
Well construction, hydraulic well test, ambient water-quality, and cycle test data were inventoried and compiled for 30 aquifer storage and recovery facilities constructed in the Floridan aquifer system in southern Florida. Most of the facilities are operated by local municipalities or counties in coastal areas, but five sites are...
PONDCALC: A tool to estimate discharge from the Alviso Salt Ponds, California
Gregory Shellenbarger, David H. Schoellhamer, Megan A. Lionberger
2007, Scientific Investigations Report 2007-5005
Former commercial salt ponds in Alviso, California, now are operated by the U.S. Fish and Wildlife Service (USFWS) to provide habitat for birds. The USFWS has modified the operation of the ponds to prevent exceedingly high salinity. Ponds that were formerly hydraulically isolated from South San Francisco Bay and adjacent...
Geophysical Data from Spring Valley to Delamar Valley, East-Central Nevada
Edward A. Mankinen, Carter W. Roberts, Edwin H. McKee, Bruce A. Chuchel, Robert L. Morin
2007, Open-File Report 2007-1190
Cenozoic basins in eastern Nevada and western Utah constitute major ground-water recharge areas in the eastern part of the Great Basin and these were investigated to characterize the geologic framework of the region. Prior to these investigations, regional gravity coverage was variable over the region, adequate in some areas and...
Fish rhabdovirus models for understanding the host response to DNA vaccines
Gael Kurath, Maureen K. Purcell, Kyle A. Garver
2007, CAB Review (2)
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High-resolution climate records of the past 2,400 years from the offshore of northernmost California and central Oregon
John A. Barron, Linda E. Heusser
Scott W. Starratt, Patrica Cornelius, James G. Joelson Jr., editor(s)
2007, Conference Paper, Proceedings of the twenty-first annual Pacific climate workshop
High resolution diatom and pollen data from piston core TN062 0550 off northernmost California, and Kasten core WW7710A-26 off coastal Oregon, are compiled for the past 2,400 years. Diatom proxy data for Fall SST from both cores record warm SST's in the intervals from ca. AD 400 to 600, and...
