A Century of Retreat at Portage Glacier, South-Central Alaska
Ben W. Kennedy, Dennis C. Trabant, Lawrence R. Mayo
2006, Fact Sheet 2006-3141
Introduction: The Portage Glacier, in south-central Alaska, is viewed by thousands of visitors annually who come to the U.S. Forest Service Begich, Boggs Visitor Center located on the road system between Anchorage and Whittier, Alaska. During the past century, the terminus of the glacier has retreated nearly 5 kilometers to...
Ground-Water Flow Modeling by the U.S. Geological Survey in Nevada: Uses and Approaches
Wayne R. Belcher, Alan H. Welch
2006, Fact Sheet 2006-3138
No abstract available....
The National Volcano Early Warning System (NVEWS)
John Ewert, Marianne Guffanti, Peter Cervelli, James Quick
2006, Fact Sheet 2006-3142
The National Volcano Early Warning System (NVEWS) is a proposed national-scale effort by the U.S. Geological Survey (USGS) Volcano Hazards Program and its affiliated partners in the Consortium of U.S. Volcano Observatories (CUSVO) (http://www.cusvo.org) to ensure that volcanoes are monitored at a level commensurate with the threats...
Natural Bitumen Resources of the United States
Water Resources Division, U.S. Geological Survey
2006, Fact Sheet 2006-3133
Major natural bitumen accumulations in the United States are estimated to contain about 36 billion barrels of measured in-place resource and about 18 billion barrels of speculative in-place resource. Major natural bitumen resources are in Alabama, Alaska, California, Kentucky, New Mexico, Oklahoma, Texas, Utah, and Wyoming....
Submarine ground-water discharge: nutrient loading and nitrogen transformations
Kevin D. Kroeger, Peter W. Swarzenski, John Crusius, John F. Bratton, Matthew A. Charette
2006, Fact Sheet 2006-3110
Eutrophication of coastal waters due to nonpoint source land-derived nitrogen (N) loads is a worldwide phenomenon and perhaps the greatest agent of change altering coastal ecology (National Research Council, 2000; Howarth and others, 2000). Within the United States, a majority of estuaries have been determined to be moderately to severely...
Investigations of the Effects of Synthetic Chemicals on the Endocrine System of Common Carp in Lake Mead, Nevada and Arizona
Michael R. Rosen, Steven L. Goodbred, Reynaldo Patiño, Thomas A. Leiker, Erik Orsak
2006, Fact Sheet 2006-3131
Introduction: Lake Mead is the largest reservoir by volume in the United States and was created by the construction of the 221-meter high Hoover Dam in 1935 at Black Canyon on the lower Colorado River between Nevada and Arizona (fig. 1). Inflows of water into the lake include three rivers, Colorado,...
Flooding in Clark and Lincoln Counties, Nevada, December 2004 and January 2005
Roslyn Ryan
2006, Fact Sheet 2006-3124
Introduction: A regional storm passed through the Las Vegas Valley, Nevada, on December 28-29, 2004, producing up to 2 inches of rain in a 24-hour period. Due to the intense, sustained rainfall, streamflow along Las Vegas Wash was near the record discharges of July 8, 1999. Additional rainfall in December...
Cape Cod Toxic Substances Hydrology research site--Physical, chemical, and biological processes that control the fate of contaminants in ground water
Denis R. LeBlanc
2006, Fact Sheet 2006-3096
No abstract available....
Flooding Frequency Alters Vegetation in Isolated Wetlands
Kim H. Haag, Terrie M. Lee
2006, Fact Sheet 2006-3117
Many isolated wetlands in central Florida occur as small, shallow depressions scattered throughout the karst topography of the region. In these wetlands, the water table approaches land surface seasonally, and water levels and flooding frequency are largely determined by differences between precipitation and evapotranspiration. Because much of the region is...
Toxicity of Sodium Bicarbonate to Fish from Coal-Bed Natural Gas Production in the Tongue and Powder River Drainages, Montana and Wyoming
Water Resources Division, U.S. Geological Survey
2006, Fact Sheet 2006-3092
This study evaluates the sensitivity of aquatic life to sodium bicarbonate (NaHCO3), a major constituent of coal-bed natural gas-produced water. Excessive amounts of sodium bicarbonate in the wastewater from coal-bed methane natural gas production released to freshwater streams and rivers may adversely affect the ability of fish to regulate their...
Strength in Numbers: Describing the Flooded Area of Isolated Wetlands
Terrie M. Lee, Kim H. Haag
2006, Fact Sheet 2006-3118
Thousands of isolated, freshwater wetlands are scattered across the karst1 landscape of central Florida. Most are small (less than 15 acres), shallow, marsh and cypress wetlands that flood and dry seasonally. Wetland health is threatened when wetland flooding patterns are altered either by human activities, such as land-use change and...
Water Availability for Ecological Needs in the Upper Flint River Basin, Georgia
M. Brian Gregory, Mary Freeman, W. Brian Hughes
2006, Fact Sheet 2006-3114
Ground-water modeling of the Death Valley Region, Nevada and California
W.R. Belcher, C.C. Faunt, D. S. Sweetkind, J.B. Blainey, C. A. San Juan, R. J. Laczniak, M. C. Hill
2006, Fact Sheet 2006-3120
The Death Valley regional ground-water flow system (DVRFS) of southern Nevada and eastern California covers an area of about 100,000 square kilometers and contains very complex geology and hydrology. Using a computer model to represent the complex system, the U.S. Geological Survey simulated ground-water flow in the Death Valley region...
The U.S. Geological Survey Energy Resources Program
Water Resources Division, U.S. Geological Survey
2006, Fact Sheet 2006-3128
The United States uses tremendous amounts of geologic energy resources. In 2004 alone, the United States consumed more than 7.4 billion barrels of oil, 21.9 trillion cubic feet of natural gas, and 1.1 billion short tons of coal. Forecasts indicate the Nation's need for energy resources will continue to grow,...
Review of Aquifer Storage and Recovery Performance in the Upper Floridan Aquifer in Southern Florida
Ronald S. Reese
2006, Fact Sheet 2006-3126
Introduction: Interest and activity in aquifer storage and recovery (ASR) in southern Florida has increased greatly during the past 10 to 15 years. ASR wells have been drilled to the carbonate Floridan aquifer system at 30 sites in southern Florida, mostly by local municipalities or counties located in coastal areas....
Materials in Use in U.S. Interstate Highways
Daniel E. Sullivan
2006, Fact Sheet 2006-3127
Summary: Natural aggregates (construction sand and gravel and crushed stone) make up the largest component of nonfuel mineral materials consumed in the United States. Most of these materials are used in construction activities, such as in buildings and roads. In highways, natural aggregates are incorporated into asphalt and concrete...
Gulf of Mexico dead zone —The last 150 years
Lisa Osterman, P.W. Swarzenski, R.Z. Poore
2006, Fact Sheet 2006-3005
'Gulf of Mexico Dead Zone-The Last 150 Years' discusses the dead zone that forms seasonally in the northern Gulf of Mexico when subsurface waters become depleted in dissolved oxygen and cannot support most life....
Effects of Streambank Fencing of Near-Stream Pasture Land on a Small Watershed in Lancaster County, Pennsylvania
Daniel G. Galeone, Dennis J. Low, Robin A. Brightbill
2006, Fact Sheet 2006-3112
This study indicated that a small buffer width along a stream in pasture land can have a positive influence on surface-water quality, benthic macroinvertebrates, and near-stream shallow ground-water quality. Overland runoff processes that move suspended sediment to the stream were controlled (or reduced) to some extent by the vegetative buffer...
Evaluating the effects of nearshore development on Wisconsin Lakes
Randall J. Hunt, Steven R. Greb, David J. Graczyk
2006, Fact Sheet 2006-3033
Data Delivery and Mapping Over the Web: National Water-Quality Assessment Data Warehouse
Richard W. Bell, Alex K. Williamson
2006, Fact Sheet 2006-3101
The U.S. Geological Survey began its National Water-Quality Assessment (NAWQA) Program in 1991, systematically collecting chemical, biological, and physical water-quality data from study units (basins) across the Nation. In 1999, the NAWQA Program developed a data warehouse to better facilitate national and regional analysis of data from 36 study units...
The National Map: Topographic Maps for the 21st Century
Water Resources Division, U.S. Geological Survey
2006, Fact Sheet 2006-3107
The U.S. Geological Survey (USGS) is committed to meeting the Nation's needs for current base geographic data and maps. Our vision is that, by working with partners, we will provide the Nation with access to current, accurate, and nationally consistent digital data and topographic maps derived from those data. This...
Mid-Continent Geographic Science Center Natural Hazards Research - Landslides
Water Resources Division, U.S. Geological Survey
2006, Fact Sheet 2006-3017
Grand Canyon Humpback Chub Population Stabilizing
Water Resources Division, U.S. Geological Survey
2006, Fact Sheet 2006-3109
The Mid-Continent Geographic Science Center
Water Resources Division, U.S. Geological Survey
2006, Fact Sheet 2006-3058
Palila Restoration: Lessons from Long-term Research
Water Resources Division, U.S. Geological Survey
2006, Fact Sheet 2006-3104
BACKGROUND The palila (Loxioides bailleui) is a member of the Hawaiian honeycreeper family of birds (Drepanidinae), which is renowned for the profusion of species - many with bizarre bills and specialized feeding habits - that radiated from a single ancestral type. Most of the 57 or so honeycreeper species are extinct,...
