Geophysical logging data from the Mills Gap Road area near Asheville, North Carolina
Melinda J. Chapman, Brad A. Huffman
2011, Data Series 538
In September 2009, the U.S. Geological Survey (USGS) was requested to assist the Environmental Protection Agency (EPA) Region 4 Superfund Section in the development of a conceptual groundwater flow model in the area of the Mills Gap Road contaminant investigation near Asheville, North Carolina (Site ID A4P5) through an Interagency...
Regional groundwater-flow model of the Redwall-Muav, Coconino, and alluvial basin aquifer systems of northern and central Arizona
D. R. Pool, Kyle W. Blasch, James B. Callegary, Stanley A. Leake, Leslie F. Graser
2011, Scientific Investigations Report 2010-5180
A numerical flow model (MODFLOW) of the groundwater flow system in the primary aquifers in northern Arizona was developed to simulate interactions between the aquifers, perennial streams, and springs for predevelopment and transient conditions during 1910 through 2005. Simulated aquifers include the Redwall-Muav, Coconino, and basin-fill aquifers. Perennial stream reaches...
Quest for water in coastal Georgia: assessment of alternative water sources at Hunter Army Airfield, Chatham County, Georgia
John S. Clarke
2011, Conference Paper, Proceedings of the 2011 Georgia Water Resources Conference
To meet growing demands for water in the coastal Georgia area, the U.S. Geological Survey, in cooperation with the U.S. Department of the Army, conducted detailed site investigations and modeling studies at Hunter Army Airfield to assess the water-bearing potential of ponds and wells completed in the Lower Floridan aquifer....
User's manual for the National Water-Quality Assessment Program Invertebrate Data Analysis System (IDAS) software, version 5
Thomas F. Cuffney, Robin A. Brightbill
2011, Techniques and Methods 7-C4
The Invertebrate Data Analysis System (IDAS) software was developed to provide an accurate, consistent, and efficient mechanism for analyzing invertebrate data collected as part of the U.S. Geological Survey National Water-Quality Assessment (NAWQA) Program. The IDAS software is a stand-alone program for personal computers that run Microsoft Windows(Registered). It allows...
Floods of September 2010 in Southern Minnesota
Christopher A. Ellison, Christopher A. Sanocki, David L. Lorenz, Gregory B. Mitton, Gregory A. Kruse
2011, Scientific Investigations Report 2011-5045
During September 22-24, 2010, heavy rainfall ranging from 3 inches to more than 10 inches caused severe flooding across southern Minnesota. The floods were exacerbated by wet antecedent conditions, where summer rainfall totals were as high as 20 inches, exceeding the historical average by more than 4 inches. Widespread flooding...
Mitigating amphibian disease: strategies to maintain wild populations and control chytridiomycosis
Douglas C. Woodhams, Jaime Bosch, Cheryl J. Briggs, Scott Cashins, Leyla R. Davis, Antje Lauer, Erin L. Muths, Robert Puschendorf, Benedikt R. Schmidt, Brandon Sheafor, Jamie Voyles
2011, Frontiers in Zoology (8)
Background Rescuing amphibian diversity is an achievable conservation challenge. Disease mitigation is one essential component of population management. Here we assess existing disease mitigation strategies, some in early experimental stages, which focus on the globally emerging chytrid fungus Batrachochytrium dendrobatidis. We discuss the precedent for each strategy...
EAARL Coastal Topography-Cape Hatteras National Seashore, North Carolina, Post-Nor'Ida, 2009: Bare Earth
J.M. Bonisteel-Cormier, Amar Nayegandhi, Xan Fredericks, J. C. Brock, C. W. Wright, D.B. Nagle, Sara Stevens
2011, Data Series 578
These remotely sensed, geographically referenced elevation measurements of lidar-derived bare-earth (BE) topography datasets were produced collaboratively by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL, and the National Park Service (NPS), Northeast Coastal and Barrier Network, Kingston, RI. This project provides highly detailed...
Time-domain electromagnetic soundings collected in Dawson County, Nebraska, 2007-09
Jason Payne, Andrew Teeple
2011, Data Series 581
Between April 2007 and November 2009, the U.S. Geological Survey, in cooperation with the Central Platte Natural Resources District, collected time-domain electro-magnetic (TDEM) soundings at 14 locations in Dawson County, Nebraska. The TDEM soundings provide information pertaining to the hydrogeology at each of 23 sites at the 14 locations; 30...
River-aquifer exchanges in the Yakima River basin, Washington
J. J. Vaccaro
2011, Scientific Investigations Report 2011-5026
Five categories of data are analyzed to enhance understanding of river-aquifer exchanges-the processes by which water moves between stream channels and the adjacent groundwater system-in the Yakima River basin. The five datasets include (1) results of chemical analyses of water for tritium (3H, a radioactive isotope of hydrogen) and the...
Conceptual ecological models to support detection of ecological change on Alaska National Wildlife Refuges
Andrea Woodward, Erik A. Beever
2011, Open-File Report 2011-1085
More than 31 million hectares of land are protected and managed in 16 refuges by the U.S. Fish and Wildlife Service (USFWS) in Alaska. The vastness and isolation of Alaskan refuges give rise to relatively intact and complete ecosystems. The potential for these lands to provide habitat for trust species...
WTAQ version 2-A computer program for analysis of aquifer tests in confined and water-table aquifers with alternative representations of drainage from the unsaturated zone
Paul M. Barlow, Allen F. Moench
2011, Techniques and Methods 3-B9
The computer program WTAQ simulates axial-symmetric flow to a well pumping from a confined or unconfined (water-table) aquifer. WTAQ calculates dimensionless or dimensional drawdowns that can be used with measured drawdown data from aquifer tests to estimate aquifer hydraulic properties. Version 2 of the program, which is described in this...
Stream profile analyses using a step-backwater model for selected reaches in the Chippewa Creek Basin in Medina, Wayne, and Summit Counties, Ohio
David E. Straub, Andrew D. Ebner
2011, Scientific Investigations Report 2011-5024
The USGS, in cooperation with the Chippewa Subdistrict of the Muskingum Watershed Conservancy District, performed hydrologic and hydraulic analyses for selected reaches of three streams in Medina, Wayne, Stark, and Summit Counties in northeast Ohio: Chippewa Creek, Little Chippewa Creek, and River Styx. This study was done to facilitate assessment...
Mysid and fish zooplanktivory in Lake Ontario: quantification of direct and indirect effects
Gideon Gal, Lars G. Rudstam, Edward L. Mills, Jana R. Lantry, Ora E. Johannsson, C. Greene
2011, Canadian Journal of Fisheries and Aquatic Sciences (63) 2734-2747
Mysis relicta and planktivorous fish feed on zooplankton in Lake Ontario and form a trophic triangle that includes intraguild predation by fish on mysids. Thus, fish affect zooplankton both directly and indirectly. To evaluate the importance of alewife (Alosa pseudoharengus), rainbow smelt (Osmerus mordax), and mysids as zooplanktivores in Lake...
Ontology patterns for complex topographic feature types
Dalia E. Varanka
2011, Cartography and Geographic Information Science (38) 126-136
Complex feature types are defined as integrated relations between basic features for a shared meaning or concept. The shared semantic concept is difficult to define in commonly used geographic information systems (GIS) and remote sensing technologies. The role of spatial relations between complex feature parts was recognized in early GIS...
Predicting community responses to perturbations in the face of imperfect knowledge and network complexity
Mark Novak, J. Timothy Wootton, Daniel F. Doak, Mark Emmerson, James A. Estes, M. Timothy Tinker
2011, Ecology (92) 836-846
How best to predict the effects of perturbations to ecological communities has been a long-standing goal for both applied and basic ecology. This quest has recently been revived by new empirical data, new analysis methods, and increased computing speed, with the promise that ecologically important insights may be obtainable from...
Integrating estimates of ecosystem services from conservation programs and practices into models for decision makers
Ned Euliss, Loren M. Smith, Shuguang Liu, Walter G. Duffy, Stephen Faulkner, Robert A. Gleason, S. Diane Eckles
2011, Ecological Applications (21) 5128-5134
Most government agencies involved in land management are seeking consistent approaches to evaluate the effects of specific management actions on ecological processes and concurrent changes on ecosystem services. This is especially true within the context of anthropogenic influences, such as land use and climate change. The Conservation Effects Assessment Project—Wetlands...
Groundwater quality in the Eastern Lake Ontario Basin, New York, 2008
Amy J. Risen, James E. Reddy
2011, Open-File Report 2011-1074
Water samples were collected from nine production wells and nine private residential wells in the Eastern Lake Ontario Basin of New York from August through October 2008 and analyzed to characterize the chemical quality of groundwater. The wells were selected to provide adequate spatial coverage of the 3,225-square-mile study area;...
‘Cape capture’: Geologic data and modeling results suggest the Holocene loss of a Carolina Cape
E. Robert Thieler, Andrew D. Ashton
2011, Geology (39) 339-342
For more than a century, the origin and evolution of the set of cuspate forelands known as the Carolina Capes—Hatteras, Lookout, Fear, and Romain—off the eastern coast of the United States have been discussed and debated. The consensus conceptual model is not only that these capes existed through much or...
Effects of natural and human factors on groundwater quality of basin-fill aquifers in the southwestern United States: Conceptual models for selected contaminants
Laura M. Bexfield, Susan A. Thiros, David W. Anning, Jena M. Huntington, Tim S. McKinney
2011, Scientific Investigations Report 2011-5020
As part of the U.S. Geological Survey National Water-Quality Assessment (NAWQA) Program, the Southwest Principal Aquifers (SWPA) study is building a better understanding of the factors that affect water quality in basin-fill aquifers in the Southwestern United States. The SWPA study area includes four principal aquifers of the United States:...
Simulation of water-use conservation scenarios for the Mississippi Delta using an existing regional groundwater flow model
Jeannie R.B. Barlow, Brian R. Clark
2011, Scientific Investigations Report 2011-5019
The Mississippi River alluvial plain in northwestern Mississippi (referred to as the Delta), once a floodplain to the Mississippi River covered with hardwoods and marshland, is now a highly productive agricultural region of large economic importance to Mississippi. Water for irrigation is supplied primarily by the Mississippi River Valley alluvial...
Habitat suitability of patch types: a case study of the Yosemite toad
Christina T. Liang, Thomas J. Stohlgren
2011, Frontiers of Earth Science (5) 217-228
Understanding patch variability is crucial in understanding the spatial population structure of wildlife species, especially for rare or threatened species. We used a well-tested maximum entropy species distribution model (Maxent) to map the Yosemite toad (Anaxyrus (= Bufo) canorus) in the Sierra Nevada mountains of California. Twenty-six environmental variables were...
Seafloor erosional processes offshore of the Chandeleur Islands, Louisiana
David C. Twichell, John Brock
2011, Fact Sheet 2011-3026
The Chandeleur Islands are a chain of barrier islands that lies along the eastern side of the modern Mississippi River Delta plain. The island chain is located near the seaward edge of the relict St. Bernard Delta, the part of the Mississippi Delta that formed between approximately 4,000 and 2,000...
Buffelgrass-Integrated modeling of an invasive plant
Tracy R. Holcombe
2011, Fact Sheet 2011-3022
Buffelgrass (Pennisetum ciliare) poses a problem in the deserts of the United States, growing in dense stands and introducing a wildfire risk in an ecosystem not adapted to fire. The Invasive Species Science Branch of the Fort Collins Science Center has worked with many partners to develop a decision support...
Trends in nutrient concentrations, loads, and yields in streams in the Sacramento, San Joaquin, and Santa Ana Basins, California, 1975-2004
Charles R. Kratzer, Robert Kent, Dina K. Seleh, Donna L. Knifong, Peter D. Dileanis, James L. Orlando
2011, Scientific Investigations Report 2010-5228
A comprehensive database was assembled for the Sacramento, San Joaquin, and Santa Ana Basins in California on nutrient concentrations, flows, and point and nonpoint sources of nutrients for 1975-2004. Most of the data on nutrient concentrations (nitrate, ammonia, total nitrogen, orthophosphate, and total phosphorus) were from the U.S. Geological Survey's...
Big Spring spinedace and associated fish populations and habitat conditions in Condor Canyon, Meadow Valley Wash, Nevada
Ian G. Jezorek, Patrick J. Connolly, Carrie S. Munz, Chris Dixon
2011, Open-File Report 2011-1072
Executive Summary: This project was designed to document habitat conditions and populations of native and non-native fish within the 8-kilometer Condor Canyon section of Meadow Valley Wash, Nevada, with an emphasis on Big Spring spinedace (Lepidomeda mollispinis pratensis). Other native fish present were speckled dace (Rhinichthys osculus) and desert sucker...
