Scaling sap flux measurements of grazed and ungrazed shrub communities with fine and coarse-resolution remote sensing
Edward P. Glenn, Kiyomi Morino, Kamel Didan, Fiona Jordan, Kenneth C. Carroll, Pamela L. Nagler, Kevin R. Hultine, Linda Sheader, Jody Waugh
2008, Ecohydrology (1) 316-329
We measured transpiration by black greasewood (Sarcobatus vermiculatus) (SAVE) and fourwing saltbush (Atriplex canescens) (ATCA) over a nitrate-contaminated aquifer in Monument Valley, Arizona, on the Colorado Plateau. Heat balance sap flow sensors were used to measure transpiration by shrubs in 2006 and 2007 and results were scaled to larger landscape...
Estimated Flood Discharges and Map of Flood-Inundated Areas for Omaha Creek, near Homer, Nebraska, 2005
Benjamin J. Dietsch, Richard C. Wilson, Kellan R. Strauch
2008, Scientific Investigations Report 2008-5107
Repeated flooding of Omaha Creek has caused damage in the Village of Homer. Long-term degradation and bridge scouring have changed substantially the channel characteristics of Omaha Creek. Flood-plain managers, planners, homeowners, and others rely on maps to identify areas at risk of being inundated. To identify areas at risk for inundation...
Evaluation of selected model constraints and variables on simulated sustainable yield from the Mississippi River Valley alluvial aquifer system in Arkansas
John B. Czarnecki
2008, Scientific Investigations Report 2008-5138
An existing conjunctive use optimization model of the Mississippi River Valley alluvial aquifer was used to evaluate the effect of selected constraints and model variables on ground-water sustainable yield. Modifications to the optimization model were made to evaluate the effects of varying (1) the upper limit of ground-water withdrawal rates,...
Three-Dimensional Geologic Model of Complex Fault Structures in the Upper Seco Creek Area, Medina and Uvalde Counties, South-Central Texas
Michael P. Pantea, J. C. Cole, Bruce D. Smith, Jason R. Faith, Charles D. Blome, David V. Smith
2008, Scientific Investigations Report 2008-5131
This multimedia report shows and describes digital three-dimensional faulted geologic surfaces and volumes of the lithologic units of the Edwards aquifer in the upper Seco Creek area of Medina and Uvalde Counties in south-central Texas. This geologic framework model was produced using (1) geologic maps and interpretations of depositional environments...
Enhancing The National Map Through Tactical Planning and Performance Monitoring
Water Resources Division, U.S. Geological Survey
2008, Fact Sheet 2008-3074
Tactical planning and performance monitoring are initial steps toward improving 'the way The National Map works' and supporting the U.S. Geological Survey (USGS) Science Strategy. This Tactical Performance Planning Summary for The National Map combines information from The National Map 2.0 Tactical Plan and The National Map Performance Milestone Matrix....
The Inskip Formation, the Harmony Formation, and the Havallah sequence of Northwestern Nevada — An interrelated Paleozoic assemblage in the home of the Sonoma orogeny
Keith B. Ketner
2008, Professional Paper 1757
An area between the towns of Winnemucca and Battle Mountain in northwestern Nevada, termed the arkosic triangle, includes the type areas of the middle to upper Paleozoic Inskip Formation and Havallah sequence, the Upper Devonian to Mississippian Harmony Formation, the Sonoma orogeny, and the Golconda thrust. According to an extensive...
Assessment of 1-chloro-4-[2,2-dichloro-1-(4-chlorophenyl)ethenyl]benzene (DDE) transformation rates on the Palos Verdes Shelf, CA
Robert P. Eganhouse, James Pontolillo
2008, Open-File Report 2007-1362
In 1953, the world's largest producer of DDT, Montrose Chemical Corporation, began to discharge process wastes into sewers of the Los Angeles County Sanitation Districts (LACSD), California. By 1971, when the sewer connection was terminated, approximately 1,500-2,000 metric tons of DDT had been introduced to the LACSD treatment plant in...
Ground-Water Storage Change and Land Subsidence in Tucson Basin and Avra Valley, Southeastern Arizona, 1998-2002
Donald R. Pool, Mark T. Anderson
2008, Scientific Investigations Report 2007-5275
Gravity and land subsidence were measured annually at wells and benchmarks within two networks in Tucson Basin and Avra Valley from 1998 to 2002. Both networks are within the Tucson Active Management Area. Annual estimates of ground-water storage change, ground-water budgets, and land subsidence were made based on the data....
Potential effects of a scenario earthquake on the economy of southern California: Baseline county-level migration characteristics and trends 1995-2000 and 2001-2010
Benson C. Sherrouse, D. J. Hester
2008, Open-File Report 2008-1212
The Multi-Hazards Demonstration Project (MHDP) is a collaboration between the U.S. Geological Survey (USGS) and various partners from the public and private sectors and academia, meant to improve Southern California's resiliency to natural hazards. In support of the MHDP objectives, the ShakeOut Scenario was developed. It describes a magnitude 7.8...
Elevation Derivatives for Mojave Desert Tortoise Habitat
Cynthia S.A. Wallace, Leila Gass
2008, Open-File Report 2008-1283
This report describes the methods used to derive various elevation-derivative grids that were inputted to the Mojave Desert Tortoise Habitat model (L. Gass and others, unpub. data). These grids, which capture information on surface roughness and topographic characteristics, are a subset of the environmental datasets evaluated for the tortoise habitat...
Multiple deleterious effects of experimentally aged sperm in a monogamous bird
Joel White, Richard H. Wagner, F. Helfenstein, Scott A. Hatch, Herve Mulard, Naves. Liliana, Etienne Danchin
2008, PNAS (105) 13947-13952
Sperm aging is known to be detrimental to reproductive performance. However, this apparently general phenomenon has seldom been studied in an evolutionary context. The negative impact of sperm aging on parental fitness should constitute a strong selective pressure for adaptations to avoid its effects. We studied the impact of sperm...
Combined high-resolution LIDAR topography and multibeam bathymetry for northern Resurrection Bay, Seward, Alaska
Keith A. Labay, Peter J. Haeussler
2008, Data Series 374
A new Digital Elevation Model was created using the best available high-resolution topography and multibeam bathymetry surrounding the area of Seward, Alaska. Datasets of (1) LIDAR topography collected for the Kenai Watershed Forum, (2) Seward harbor soundings from the U.S. Army Corp of Engineers, and (3) multibeam bathymetry from the...
Resistivity profiling for mapping gravel layers that may control contaminant migration at the Amargosa Desert Research Site, Nevada
Jeffrey E. Lucius, Jared D. Abraham, Bethany L. Burton
2008, Scientific Investigations Report 2008-5091
Gaseous contaminants, including CFC 113, chloroform, and tritiated compounds, move preferentially in unsaturated subsurface gravel layers away from disposal trenches at a closed low-level radioactive waste-disposal facility in the Amargosa Desert about 17 kilometers south of Beatty, Nevada. Two distinct gravel layers are involved in contaminant transport: a thin, shallow...
Potential effects of a scenario earthquake on the economy of southern California: Small business exposure and sensitivity analysis to a magnitude 7.8 earthquake
Benson C. Sherrouse, D. J. Hester, Anne M. Wein
2008, Open-File Report 2008-1222
The Multi-Hazards Demonstration Project (MHDP) is a collaboration between the U.S. Geological Survey (USGS) and various partners from the public and private sectors and academia, meant to improve Southern California's resiliency to natural hazards (Jones and others, 2007). In support of the MHDP objectives, the ShakeOut Scenario was developed. It...
Channel Evolution on the Lower Elwha River, Washington, 1939-2006
Amy E. Draut, Joshua B. Logan, Randall E. McCoy, Michael McHenry, Jonathan A. Warrick
2008, Scientific Investigations Report 2008-5127
Analyses of historical aerial photographs of the lower Elwha River, Clallam County, Washington, reveal rates and patterns of channel change in this dammed, anabranching river between 1939 and 2006. Absolute positional changes of the active-floodplain margins, which commonly exceeded 50 m over that interval, have exceeded 400 m locally. Annualized...
Regression Analysis of Stage Variability for West-Central Florida Lakes
Laura A. Sacks, Donald L. Ellison, Amy Swancar
2008, Scientific Investigations Report 2008-5147
The variability in a lake's stage depends upon many factors, including surface-water flows, meteorological conditions, and hydrogeologic characteristics near the lake. An understanding of the factors controlling lake-stage variability for a population of lakes may be helpful to water managers who set regulatory levels for lakes. The goal of this...
Potential effects of a scenario earthquake on the economy of southern California: Labor market exposure and sensitivity analysis to a magnitude 7.8 earthquake
Benson C. Sherrouse, D. J. Hester, Anne M. Wein
2008, Open-File Report 2008-1211
The Multi-Hazards Demonstration Project (MHDP) is a collaboration between the U.S. Geological Survey (USGS) and various partners from the public and private sectors and academia, meant to improve Southern California's resiliency to natural hazards (Jones and others, 2007). In support of the MHDP objectives, the ShakeOut Scenario was developed. It...
Hydrochemical Regions of the Glacial Aquifer System, Northern United States, and Their Environmental and Water-Quality Characteristics
Terri Arnold, Kelly L. Warner, George E. Groschen, James P. Caldwell, Stephen J. Kalkhoff
2008, Scientific Investigations Report 2008-5015
The glacial aquifer system in the United States is a large (953,000 square miles) regional aquifer system of heterogeneous composition. As described in this report, the glacial aquifer system includes all unconsolidated geologic material above bedrock that lies on or north of the line of maximum glacial advance within the...
Shallow-conduit dynamics at Stromboli Volcano, Italy, imaged from waveform inversions
Bernard A. Chouet, Marcello Martini
2008, Geological Society of London Special Publications (307) 57-84
Modelling of Very-Long-Period (VLP) seismic data recorded during explosive activity at Stromboli in 1997 provides an image of the uppermost 1 km of its volcanic plumbing system. Two distinct dyke-like conduit structures are identified, each representative of explosive eruptions from two different vents located near the northern and southern perimeters...
Users Manual for the Geospatial Stream Flow Model (GeoSFM)
Guleid A. Artan, Kwabena Asante, Jodie Smith, Md Shahriar Pervez, Debbie Entenmann, James P. Verdin, James Rowland
2008, Open-File Report 2007-1440
The monitoring of wide-area hydrologic events requires the manipulation of large amounts of geospatial and time series data into concise information products that characterize the location and magnitude of the event. To perform these manipulations, scientists at the U.S. Geological Survey Center for Earth Resources Observation and Science (EROS), with...
Moderate Resolution Imaging Spectroradiometer (MODIS) Overview
Water Resources Division, U.S. Geological Survey
2008, Fact Sheet 2008-3061
The Moderate Resolution Imaging Spectroradiometer (MODIS) is an instrument that collects remotely sensed data used by scientists for monitoring, modeling, and assessing the effects of natural processes and human actions on the Earth's surface. The continual calibration of the MODIS instruments, the refinement of algorithms used to create higher-level products,...
Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Overview
Water Resources Division, U.S. Geological Survey
2008, Fact Sheet 2008-3066
The National Aeronautics and Space Administration (NASA) launched Terra, the Earth Observing System's (EOS) flagship satellite platform on December 18, 1999. The polar-orbiting Terra contains five remote sensing instruments, which enable the scientific study and analyses of global terrestrial processes and manifestations of global change. One of the five instruments...
Monitoring fine-grained sediment in the Colorado River ecosystem, Arizona — Control network and conventional survey techniques
Joseph E. Hazel Jr., Matt Kaplinski, Roderic A. Parnell, Keith Kohl, John C. Schmidt
2008, Open-File Report 2008-1276
In 2002, fine-grained sediment (sand, silt, and clay) monitoring in the Colorado River downstream from Glen Canyon Dam was initiated to survey channel topography at scales previously unobtainable in this canyon setting. This report presents the methods used to establish the high-resolution global positioning system (GPS) control network required for...
Portable chamber measurements of evapotranspiration at the Amargosa Desert Research Site near Beatty, Nye County, Nevada, 2003-06
C. Amanda Garcia, Michael J. Johnson, Brian J. Andraski, Keith J. Halford, C. Justin Mayers
2008, Scientific Investigations Report 2008-5135
Portable chamber measurements of evapotranspiration (ET) were made at the U.S. Geological Survey's Amargosa Desert Research Site in southern Nevada to help quantify component- and landscape-scale contributions to ET in an arid environment. Evapotranspiration data were collected approximately every 3 months from 2003 to 2006. Chamber measurements of ET were...
Quantitative Mineral Resource Assessment of Copper, Molybdenum, Gold, and Silver in Undiscovered Porphyry Copper Deposits in the Andes Mountains of South America
Charles G. Cunningham, Eduardo O. Zappettini, Waldo Vivallo S., Carlos Mario Celada, Jorge Quispe, Donald A. Singer, Joseph A. Briskey, David M. Sutphin, Mariano Gajardo M., Alejandro Diaz, Carlos Portigliati, Vladimir I. Berger, Rodrigo Carrasco, Klaus J. Schulz
2008, Open-File Report 2008-1253
Quantitative information on the general locations and amounts of undiscovered porphyry copper resources of the world is important to exploration managers, land-use and environmental planners, economists, and policy makers. This publication contains the results of probabilistic estimates of the amounts of copper (Cu), molybdenum (Mo), gold (Au), and silver (Ag)...
