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Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.

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Approaches in highly parameterized inversion: bgaPEST, a Bayesian geostatistical approach implementation with PEST: documentation and instructions Approaches in highly parameterized inversion: bgaPEST, a Bayesian geostatistical approach implementation with PEST: documentation and instructions

The application bgaPEST is a highly parameterized inversion software package implementing the Bayesian Geostatistical Approach in a framework compatible with the parameter estimation suite PEST. Highly parameterized inversion refers to cases in which parameters are distributed in space or time and are correlated with one another. The Bayesian aspect of bgaPEST is related to Bayesian...
Authors
Michael N. Fienen, Marco D'Oria, John E. Doherty, Randall J. Hunt

Effects of best-management practices in Bower Creek in the East River priority watershed, Wisconsin, 1991-2009 Effects of best-management practices in Bower Creek in the East River priority watershed, Wisconsin, 1991-2009

Hydrologic and water-quality data were collected at Bower Creek during the periods before best-management practices (BMPs), and after BMPs were installed for evaluation of water-quality improvements. The monitoring was done between 1990 and 2009 with the pre-BMP period ending in July 1994 and the post-BMP period beginning in October 2006. BMPs installed in this basin included streambank...
Authors
Steven R. Corsi, Judy A. Horwatich, Troy D. Rutter, Roger T. Bannerman

An automated digital imaging system for environmental monitoring applications An automated digital imaging system for environmental monitoring applications

Recent improvements in the affordability and availability of high-resolution digital cameras, data loggers, embedded computers, and radio/cellular modems have advanced the development of sophisticated automated systems for remote imaging. Researchers have successfully placed and operated automated digital cameras in remote locations and in extremes of temperature and humidity, ranging...
Authors
Rian Bogle, Miguel Velasco, John Vogel

The ongoing Puʻu ʻŌʻō eruption of Kīlauea Volcano, Hawaiʻi: 30 years of eruptive activity The ongoing Puʻu ʻŌʻō eruption of Kīlauea Volcano, Hawaiʻi: 30 years of eruptive activity

The Puʻu ʻŌʻō eruption of Kīlauea Volcano is its longest rift-zone eruption in more than 500 years. Since the eruption began in 1983, lava flows have buried 48 square miles (125 square kilometers) of land and added about 500 acres (200 hectares) of new land to the Island of Hawaiʻi. The eruption not only challenges local communities, which must adapt to an ever-changing and sometimes...
Authors
Tim R. Orr, Christina Heliker, Matthew R. Patrick

Comparison of water consumption in two riparian vegetation communities along the central Platte River, Nebraska, 2008–09 and 2011 Comparison of water consumption in two riparian vegetation communities along the central Platte River, Nebraska, 2008–09 and 2011

The Platte River is a vital natural resource for the people, plants, and animals of Nebraska. A recent study quantified water use by riparian woodlands along central reaches of the Platte River, Nebraska, finding that water use was mainly regulated below maximum predicted levels. A comparative study was launched through a cooperative partnership between the U.S. Geological Survey, the...
Authors
Brent M. Hall, David L. Rus

2011 monitoring and tracking wet nitrogen deposition at Rocky Mountain National Park 2011 monitoring and tracking wet nitrogen deposition at Rocky Mountain National Park

No abstract available.
Authors
Kristi Morris, Alisa Mast, Greg Wetherbee, Jill Baron, Curt Taipale, Tamara Blett, David Gay, Jared Heath

Status of a reconnaissance field study of the Susitna basin, 2011 Status of a reconnaissance field study of the Susitna basin, 2011

The Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Division of Oil and Gas (DOG), in collaboration with the U.S. Geological Survey (USGS) performed reconnaissance field studies for ten days in late June 2011, in the Susitna basin, directly north of Cook Inlet, south-central Alaska (fig. 1). The purpose of our investigation was to reconnoiter outcrops in the basin...
Authors
Robert J. Gillis, Richard G. Stanley, David L. LePain, David J. Mauel, Trystan M. Herriott, Kenneth P. Helmold, C. Shaun Peterson, Marwan A. Wartes, Diane P. Shellenbaum

Operational Group Sandy technical progress report Operational Group Sandy technical progress report

Hurricane Sandy made US landfall near Atlantic City, NJ on 29 October 2012, causing 72 direct deaths, displacing thousands of individuals from damaged or destroyed dwellings, and leaving over 8.5 million homes without power across the northeast and mid-Atlantic. To coordinate federal rebuilding activities in the affected region, the President established the cabinet-level Hurricane Sandy
Authors

Sculpin and round goby assessment, Lake Ontario 2012 Sculpin and round goby assessment, Lake Ontario 2012

Historically slimy sculpin Cottus cognatus were the most abundant native, benthic prey fish in Lake Ontario and important prey for juvenile lake trout. Over the past 34 years, slimy sculpin abundance has fluctuated, but generally decreased, with a substantial decline occurring in the past 10 years. The 2012 slimy sculpin mean density (0.005 ind.·m-2, sd=0.012, n=62) and mean biomass...
Authors
Brian Weidel, Maureen G. Walsh, M.J. Connerton

Seafloor off Natural Bridges State Beach, Santa Cruz, California Seafloor off Natural Bridges State Beach, Santa Cruz, California

The seafloor off Natural Bridges State Beach, Santa Cruz, California, is extremely varied, with sandy flats, boulder fields, faults, and complex bedrock ridges. These ridges support rich marine ecosystems; some of them form the "reefs" that produce world-class surf breaks. Colors indicate seafloor depth, from red-orange (about 2 meters or 7 feet) to magenta (25 meters or 82 feet).
Authors
Curt D. Storlazzi, Nadine E. Golden, Helen Gibbons

Vegetation projections for Wind Cave National Park with three future climate scenarios: Final report in completion of Task Agreement J8W07100052 Vegetation projections for Wind Cave National Park with three future climate scenarios: Final report in completion of Task Agreement J8W07100052

Introduction The effects of climate change on the natural resources protected by Parks will likely be substantial, but geographically variable, due to local variation in climate trajectories and differences among ecosystems in their vulnerability to climate change. The projections of general circulation models (GCMs) indicate the possible magnitude and direction of future climate change...
Authors
David A. King, Dominique M. Bachelet, Amy J. Symstad

Mount Rainier National Park and Olympic National Park elk monitoring program annual report 2011 Mount Rainier National Park and Olympic National Park elk monitoring program annual report 2011

Fiscal year 2011 was the first year of implementing an approved elk monitoring protocol in Mount Rainier (MORA) and Olympic (OLYM) National Parks in the North Coast and Cascades Network (NCCN) (Griffin et al. 2012). However, it was the fourth and second year of gathering data according to protocol in MORA and OLYM respectively; data gathered during the protocol development phase followed
Authors
Patricia J. Happe, Mason Reid, Paul C. Griffin, Kurt J. Jenkins, David J. Vales, Barbara J. Moeller, Michelle Tirhi, Scott McCorquodale
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