Assessing the vulnerability of public-supply wells to contamination—High Plains Aquifer near York, Nebraska
Martha L. Jagucki, Matthew K. Landon, Brian R. Clark, Sandra M. Eberts
2008, Fact Sheet 2008-3025
The U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program found, in studies from 1991 to 2001, low levels of mixtures of contaminants in ground water near the water table in urban areas across the Nation. Although contaminants were detected less frequently in deeper ground water typically developed for public supply...
Flow-log analysis for hydraulic characterization of selected test wells at the Indian Point Energy Center, Buchanan, New York
John H. Williams
2008, Open-File Report 2008-1123
Flow logs from 24 test wells were analyzed as part of the hydraulic characterization of the metamorphosed and fractured carbonate bedrock at the Indian Point Energy Center in Buchanan, New York. The flow logs were analyzed along with caliper, optical- and acoustic-televiewer, and fluid-resistivity and temperature logs to determine the...
The Face of Alaska: A Look at Land Cover and the Potential Drivers of Change
Benjamin M. Jones
2008, Open-File Report 2008-1161
The purpose of this report is to provide statewide baseline information on the status and potential drivers of land-cover change in Alaska. The information gathered for this report is based on a review and analysis of published literature and consists of prominent factors contributing to the current state of the...
Modeling Water-Surface Elevations and Virtual Shorelines for the Colorado River in Grand Canyon, Arizona
Christopher S. Magirl, Michael J. Breedlove, Robert H. Webb, Peter G. Griffiths
2008, Scientific Investigations Report 2008-5075
Using widely-available software intended for modeling rivers, a new one-dimensional hydraulic model was developed for the Colorado River through Grand Canyon from Lees Ferry to Diamond Creek. Solving one-dimensional equations of energy and continuity, the model predicts stage for a known steady-state discharge at specific locations, or cross sections, along...
Consumptive Water Use in the Great Lakes Basin
Kimberly H. Shaffer
2008, Fact Sheet 2008-3032
Great Lakes state agencies and organizations view understanding consumptive water use as a critical component in water-resource management. To assist them in developing a better understanding of the factors involved in consumptive use, the U.S. Geological Survey (USGS) has completed an inventory of consumptive-use coefficients for the Great Lakes Basin....
Sedimentation Survey of Lago La Plata, Puerto Rico, July 2006
Luis R. Soler-Lopez
2008, Scientific Investigations Map 3021
Lago La Plata dam is located between the municipalities of Naranjito and Toa Alta in north central Puerto Rico, about 5 kilometers south of the town of Toa Alta and about 5 kilometers north of the town of Naranjito. The reservoir impounds the waters of the Rio de La Plata, the...
Comparisons of Simulated Hydrodynamics and Water Quality for Projected Demands in 2046, Pueblo Reservoir, Southeastern Colorado
Roderick F. Ortiz, Joel M. Galloway, Lisa D. Miller, David P. Mau
2008, Scientific Investigations Report 2008-5079
Pueblo Reservoir is one of southeastern Colorado's most valuable water resources. The reservoir provides irrigation, municipal, and industrial water to various entities throughout the region. The reservoir also provides flood control, recreational activities, sport fishing, and wildlife enhancement to the region. The Bureau of Reclamation is working to meet its...
Noise in GPS displacement measurements from southern California and southern Nevada
John O. Langbein
2008, Journal of Geophysical Research Solid Earth (113)
Time series of position changes estimated from data from 236 continuously recording GPS receivers operating in Southern California and Southern Nevada are evaluated for noise models that characterize their temporal correlations. The lengths of the time series range between 3.5 and 10 years. After adjusting these data for postseismic deformation,...
Leachate Geochemical Results for Ash and Burned Soil Samples from the October 2007 Southern California Wildfires
Philip L. Hageman, Geoffrey S. Plumlee, Deborah A. Martin, Todd M. Hoefen, Gregory P. Meeker, Monique Adams, Paul J. Lamothe, Michael W. Anthony
2008, Open-File Report 2008-1139
This report is the second release of leachate geochemical data included as part of a multidisciplinary study of ash and burned soil samples from the October 2007 wildfires in southern California. Geochemical data for the first set of samples were released in an Open-File Report (Plumlee and others, 2007). This...
Probabilistic Methodology for Estimation of Number and Economic Loss (Cost) of Future Landslides in the San Francisco Bay Region, California
Robert A. Crovelli, Jeffrey A. Coe
2008, Open-File Report 2008-1116
The Probabilistic Landslide Assessment Cost Estimation System (PLACES) presented in this report estimates the number and economic loss (cost) of landslides during a specified future time in individual areas, and then calculates the sum of those estimates. The analytic probabilistic methodology is based upon conditional probability theory and laws of...
Environmental Monitoring and Assessment Program Western Pilot Project - Information about selected fish and macroinvertebrates sampled from North Dakota perennial streams, 2000-2003
Kevin C. Vining, Robert F. Lundgren
2008, Fact Sheet 2008-3029
Sixty-five sampling sites, selected by a statistical design to represent lengths of perennial streams in North Dakota, were chosen to be sampled for fish and aquatic insects (macroinvertebrates) to establish unbiased baseline data. Channel catfish and common carp were the most abundant game and large fish species in the Cultivated...
Effects of habitat characteristics and water quality on macroinvertebrate communities along the Neversink River in southeastern New York, 1991-2001
Anne G. Ernst, Barry P. Baldigo, George E. Schuler, Colin D. Apse, James L. Carter, Gary T. Lester
2008, Scientific Investigations Report 2008-5024
The Neversink River, in the Catskill Mountains of southeastern New York State, feeds the Neversink Reservoir, which diverts 85 percent of the river’s flow to New York City. Acidification of several headwater reaches has affected macroinvertebrate assemblages throughout the river system above the reservoir, and the alteration of flow conditions...
Availability, sustainability, and suitability of ground water, Rogers Mesa, Delta County, Colorado: Types of analyses and data for use in subdivision water-supply reports
Kenneth R. Watts
2008, Scientific Investigations Report 2008-5020
The population of Delta County, Colorado, like that in much of the Western United States, is forecast to increase substantially in the next few decades. A substantial portion of the increased population likely will reside in rural subdivisions and use residential wells for domestic water supplies. In Colorado, a subdivision...
Hydrogeochemical investigation of the Standard Mine Vicinity, Upper Elk Creek Basin, Colorado
Andrew H. Manning, Philip L. Verplanck, M. Alisa Mast, Richard B. Wanty
2008, Scientific Investigations Report 2007-5265
Ground- and surface-water samples were collected in the vicinity of the Standard Mine in west-central Colorado in order to characterize the local ground-water flow system, determine metal concentrations in local ground water, and better understand factors controlling the discharge of metal-rich waters from the mine. The sampling program included a...
Water Quality and Biological Characteristics of the Middle Fork of the Saline River, Arkansas, 2003-06
Joel M. Galloway, James C. Petersen, Erica L. Shelby, Jim A. Wise
2008, Scientific Investigations Report 2008-5018
The Middle Fork of the Saline River has many qualities that have been recognized by State and Federal agencies. The Middle Fork provides habitat for several rare aquatic species and is part of a larger stream system (the Upper Saline River) that is known for relatively high levels of species...
Environmental Monitoring and Assessment Program Western Pilot Project— Conditions of North Dakota perennial streams for water chemistry and mercury in fish tissue, 2000–2003
Kevin C. Vining, Robert F. Lundgren
2008, Fact Sheet 2008-3028
Sixty-five sampling sites, selected by a statistical design to represent lengths of perennial streams in North Dakota, were chosen to be sampled for water chemistry and mercury in fish tissue to establish unbiased baseline data. From the assessment of all water chemistry constituents, the percentage of stream length considered to...
Where's the Hayward Fault? A green guide to the fault
Philip W. Stoffer
2008, Open-File Report 2008-1135
This report describes self-guided field trips to one of North America's most dangerous earthquake faults: the Hayward Fault. Locations were chosen because of their easy access using mass transit and/or their significance relating to the natural and cultural history of the East Bay landscape. This field-trip guidebook was compiled to...
Sea-Floor Mapping and Benthic Habitat GIS for the Elwha River Delta Nearshore, Washington
Guy R. Cochrane, Jonathan A. Warrick, Yael Sagy, David Finlayson, Jodi Harney
2008, Data Series 320
From March 1531, 2005, more than 252 km (19.5 km2) of seafloor offshore of the Elwha River Delta in the central Strait of Juan de Fuca was mapped by the USGS Coastal and Marine Geology Program. The purpose of this nearshore mapping was to (1) obtain high resolution bathymetry and...
Simulation of Hydrodynamics and Water Quality in Pueblo Reservoir, Southeastern Colorado, for 1985 through 1987 and 1999 through 2002
Joel M. Galloway, Roderick F. Ortiz, Jerad D. Bales, David P. Mau
2008, Scientific Investigations Report 2008-5056
Pueblo Reservoir is west of Pueblo, Colorado, and is an important water resource for southeastern Colorado. The reservoir provides irrigation, municipal, and industrial water to various entities throughout the region. In anticipation of increased population growth, the cities of Colorado Springs, Fountain, Security, and Pueblo West have proposed building a...
Update on Regulation of Sand Transport in the Colorado River by Changes in the Surface Grain Size of Eddy Sandbars over Multiyear Timescales
David J. Topping, David M. Rubin, John C. Schmidt
2008, Scientific Investigations Report 2008-5042
In settings where the transport of sand is partially or fully supply limited, changes in the upstream supply of sand are coupled to changes in the grain size of sand on the bed. In this manner, the transport of sand under the supply-limited case is ?grain-size regulated.? Since the closure...
Algal and Invertebrate Community Composition along Agricultural Gradients: A Comparative Study from Two Regions of the Eastern United States
Daniel L. Calhoun, M. Brian Gregory, Holly S. Weyers
2008, Scientific Investigations Report 2008-5046
Benthic algal and invertebrate communities in two Coastal Plain regions of the Eastern United States?the Delmarva Peninsula (27 sites) and Georgia Upper Coastal Plain (29 sites)?were assessed to determine if aspects of agricultural land use and nutrient conditions (dissolved and whole-water nitrogen and phosphorus) could be linked to biological community...
Catalog of Mount St. Helens 2004 - 2005 tephra samples with major- and trace-element geochemistry
Michael C. Rowe, Carl R. Thornber, Daniel J. Gooding, John S. Pallister
2008, Open-File Report 2008-1131
This open-file report presents a catalog of information about 135 ash samples along with geochemical analyses of bulk ash, glass and individual mineral grains from tephra deposited as a result of volcanic activity at Mount St. Helens, Washington, from October 1, 2004 until August 15, 2005. This data, in conjunction...
Assessment of Undiscovered Petroleum Resources of the North and East Margins of the Siberian Craton, Russian Federation
T. R. Klett
2008, Fact Sheet 2008-3020
Four geologic provinces located along the north and east margins of the Siberian craton were assessed for undiscovered crude oil, natural gas, and natural gas liquids/condensates resources as part of the U.S. Geological Survey's (USGS) Circum-Arctic Oil and Gas Resource Appraisal. Using a geology-based methodology, the USGS estimated the mean...
A major unconformity between Permian and Triassic strata at Cape Kekurnoi, Alaska Peninsula: Old and new observations on stratigraphy and hydrocarbon potential
Robert B. Blodgett, Bryan Sralla
2008, Professional Paper 1739-E
A major angular unconformity separates carbonates and shales of the Upper Triassic Kamishak Formation from an underlying unnamed sequence of Permian agglomerate, volcaniclastic rocks (sandstone), and limestone near Puale Bay on the Alaska Peninsula. For the first time, we photographically document the angular unconformity in outcrop, as clearly exposed in...
Bathymetric Survey and Storage Capacity of Upper Lake Mary near Flagstaff, Arizona
Nancy J. Hornewer, Marilyn E. Flynn
2008, Open-File Report 2008-1098
Upper Lake Mary is a preferred drinking-water source for the City of Flagstaff, Arizona. Therefore, storage capacity and sedimentation issues in Upper Lake Mary are of interest to the City. The U.S. Geological Survey, in cooperation with the City of Flagstaff, collected bathymetric and land-survey data in Upper Lake Mary...
