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Series

2009

University of Nebraska - Lincoln

Publications of the US Geological Survey

Articles 1 - 16 of 16

Full-Text Articles in Physical Sciences and Mathematics

Northern Prairie Wildlife Research Center Apr 2009

Northern Prairie Wildlife Research Center

Publications of the US Geological Survey

Contents:
Integrated Science for the Nation’s Northern Great Plains
Core Science Capabilities
Center Expertise
Highlights of Current Research Program
Our Mission
Locations of the Center and Duty Stations


Changes In Water Levels And Storage In The High Plains Aquifer, Predevelopment To 2007, V. L. Mcguire Feb 2009

Changes In Water Levels And Storage In The High Plains Aquifer, Predevelopment To 2007, V. L. Mcguire

Publications of the US Geological Survey

The High Plains aquifer underlies 111.6 mil¬lion acres (174,000 square miles) in parts of eight States—Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. The area overlying the High Plains aquifer is one of the primary agricultural regions in the Nation. Water-level declines began in parts of the High Plains aquifer soon after the beginning of substantial irrigation with ground water in the aquifer area. By 1980, water levels in the High Plains aquifer in parts of Texas, Oklahoma, and southwestern Kansas had declined more than 100 feet (Luckey and others, 1981). In response to these water-level declines, …


Geomorphic Segmentation, Hydraulic Geometry, And Hydraulic Microhabitats Of The Niobrara River, Nebraska—Methods And Initial Results, Jason S. Alexander, Ronald B. Zelt, Nathaniel J. Schaepe Jan 2009

Geomorphic Segmentation, Hydraulic Geometry, And Hydraulic Microhabitats Of The Niobrara River, Nebraska—Methods And Initial Results, Jason S. Alexander, Ronald B. Zelt, Nathaniel J. Schaepe

Publications of the US Geological Survey

The Niobrara River of Nebraska is a geologically, ecologically, and economically significant resource. The State of Nebraska has recognized the need to better manage the surface- and ground-water resources of the Niobrara River so they are sustainable in the long term. In cooperation with the Nebraska Game and Parks Commission, the U.S. Geological Survey is investigating the hydrogeomorphic settings and hydraulic geometry of the Niobrara River to assist in characterizing the types of broad-scale physical habitat attributes that may be of importance to the ecological resources of the river system. This report includes an inventory of surface-water and ground-water hydrology …


Water-Level Changes In The High Plains Aquifer, Predevelopment To 2007, 2005–06, And 2006–07, V. L. Mcguire Jan 2009

Water-Level Changes In The High Plains Aquifer, Predevelopment To 2007, 2005–06, And 2006–07, V. L. Mcguire

Publications of the US Geological Survey

The High Plains aquifer underlies 111.6 million acres (174,000 square miles) in parts of eight States—Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. Water-level declines began in parts of the High Plains aquifer soon after the beginning of substantial irrigation with ground water in the aquifer area. This report presents water-level changes in the High Plains aquifer from the time before substantial ground-water irrigation development had occurred (about 1950 and termed “predevelopment” in this report) to 2007, from 2005–06, and from 2006–07. The report also presents the percentage change in saturated thickness of the aquifer, from predevelopment …


Quantifying Equid Behavior—A Research Ethogram For Free-Roaming Feral Horses, Jason I. Ransom, Brian S. Cade Jan 2009

Quantifying Equid Behavior—A Research Ethogram For Free-Roaming Feral Horses, Jason I. Ransom, Brian S. Cade

Publications of the US Geological Survey

Feral horses (Equus caballus) are globally distributed in free-roaming populations on all continents except Antarctica and occupy a wide range of habitats including forest, grassland, desert, and montane environments. The largest populations occur in Australia and North America and have been the subject of scientific study for decades, yet guidelines and ethograms for feral horse behavioral research are largely absent in the scientific literature. The U.S. Geological Survey (USGS) Fort Collins Science Center conducted research on the influences of the immunocontraceptive porcine zona pellucida (PZP) on feral horse behavior from 2003–2006 in three discrete populations in the American …


Trends In Streamflow Characteristics Of Selected Sites In The Elkhorn River, Salt Creek, And Lower Platte River Basins, Eastern Nebraska, 1928–2004, And Evaluation Of Streamflows In Relation To Instream-Flow Criteria, 1953–2004, Benjamin J. Dietsch, Julie A. Godberson, Gregory V. Steele Jan 2009

Trends In Streamflow Characteristics Of Selected Sites In The Elkhorn River, Salt Creek, And Lower Platte River Basins, Eastern Nebraska, 1928–2004, And Evaluation Of Streamflows In Relation To Instream-Flow Criteria, 1953–2004, Benjamin J. Dietsch, Julie A. Godberson, Gregory V. Steele

Publications of the US Geological Survey

The Nebraska Department of Natural Resources approved instream-flow appropriations on the Platte River to maintain fish communities, whooping crane roost habitat, and wet meadows used by several wild bird species. In the lower Platte River region, the Nebraska Game and Parks Commission owns an appropriation filed to maintain streamflow for fish communities between the Platte River confluence with the Elkhorn River and the mouth of the Platte River. Because Elkhorn River flow is an integral part of the flow in the reach addressed by this appropriation, the Upper Elkhorn and Lower Elkhorn Natural Resources Districts are involved in overall management …


Thresholds Of Climate Change In Ecosystems: Final Report, Synthesis And Assessment Product 4.2, Craig D. Allen, Charles Birkeland, F. Stuart Chapin, Iii, Peter M. Groffman, Glenn . R. Guntenspergen, Alan K. Knapp, A. David Mcguire, Patrick J. Mulholland, Debra P.C. Peters, Daniel D. Roby, George Sugihara Jan 2009

Thresholds Of Climate Change In Ecosystems: Final Report, Synthesis And Assessment Product 4.2, Craig D. Allen, Charles Birkeland, F. Stuart Chapin, Iii, Peter M. Groffman, Glenn . R. Guntenspergen, Alan K. Knapp, A. David Mcguire, Patrick J. Mulholland, Debra P.C. Peters, Daniel D. Roby, George Sugihara

Publications of the US Geological Survey

As defined in this Synthesis and Assessment Report, ‘an ecological threshold is the point at which there is an abrupt change in an ecosystem quality, property, or phenomenon, or where small changes in one or more external conditions produce large and persistent responses in an ecosystem’.
Ecological thresholds occur when external factors, positive feedbacks, or nonlinear instabilities in a system cause changes to propagate in a domino-like fashion that is potentially irreversible. This report reviews threshold changes in North American ecosystems that are potentially induced by climatic change and addresses the significant challenges these threshold crossings impose on resource and …


White-Nose Syndrome Threatens The Survival Of Hibernating Bats In North America, U.S. Geological Survey Jan 2009

White-Nose Syndrome Threatens The Survival Of Hibernating Bats In North America, U.S. Geological Survey

Publications of the US Geological Survey

During the winter of 2006/2007, an affliction of unknown origin dubbed “White-Nose Syndrome” (WNS) began devastating colonies of hibernating bats in a small area around Albany, New York. Colonies of hibernating bats were reduced 81-97% at the affected caves and mines that were surveyed. Since then, White-Nose Syndrome has been detected more than 700 kilometers (450 mi) away from the original site, and has infected bats in eight surrounding states. Most species of bats that hibernate in the region are now known to be affected and little brown bats (Myotis lucifugus), northern long-eared bats (M. septentrionalis), …


Climate Change And Water Resources Management: A Federal Perspective, Levi D. Brekke, Julie E. Kiang, J. Rolf Olsen, Roger S. Pulwarty, David A. Raff, D. Phil Turnipseed, Robert S. Webb, Kathleen D. White Jan 2009

Climate Change And Water Resources Management: A Federal Perspective, Levi D. Brekke, Julie E. Kiang, J. Rolf Olsen, Roger S. Pulwarty, David A. Raff, D. Phil Turnipseed, Robert S. Webb, Kathleen D. White

Publications of the US Geological Survey

Many challenges, including climate change, face the Nation’s water managers. The Intergovernmental Panel on Climate Change (IPCC) has provided estimates of how climate may change, but more understanding of the processes driving the changes, the sequences of the changes, and the manifestation of these global changes at different scales could be beneficial. Since the changes will likely affect fundamental drivers of the hydrological cycle, climate change may have a large impact on water resources and water resources managers.

The purpose of this interagency report prepared by the U.S. Geological Survey (USGS), U.S. Army Corps of Engineers (USACE), Bureau of Reclamation …


Mercury, Methylmercury, And Other Constituents In Sediment And Water From Seasonal And Permanent Wetlands In The Cache Creek Settling Basin And Yolo Bypass, Yolo County, California, 2005−06, Mark Marvin-Dipasquale, Charles N. Alpers, Jacob A. Fleck Jan 2009

Mercury, Methylmercury, And Other Constituents In Sediment And Water From Seasonal And Permanent Wetlands In The Cache Creek Settling Basin And Yolo Bypass, Yolo County, California, 2005−06, Mark Marvin-Dipasquale, Charles N. Alpers, Jacob A. Fleck

Publications of the US Geological Survey

This report presents surface water and surface (top 0-2 cm) sediment geochemical data collected during 2005-2006, as part of a larger study of mercury (Hg) dynamics in seasonal and permanently flooded wetland habitats within the lower Sacramento River basin, Yolo County, California. The study was conducted in two phases. Phase I represented reconnaissance sampling and included three locations within the Cache Creek drainage basin; two within the Cache Creek Nature Preserve (CCNP) and one in the Cache Creek Settling Basin (CCSB) within the creek’s main channel near the southeast outlet to the Yolo Bypass. Two additional downstream sites within the …


Geophysical Log Analysis Of Selected Test Holes And Wells In The High Plains Aquifer, Central Platte River Basin, Nebraska, J. Alton Anderson, Roger H. Morin, James C. Cannia, John H. Williams Jan 2009

Geophysical Log Analysis Of Selected Test Holes And Wells In The High Plains Aquifer, Central Platte River Basin, Nebraska, J. Alton Anderson, Roger H. Morin, James C. Cannia, John H. Williams

Publications of the US Geological Survey

The U.S. Geological Survey in cooperation with the Central Platte Natural Resources District is investigating the hydrostratigraphic framework of the High Plains aquifer in the Central Platte River basin. As part of this investigation, a comprehensive set of geophysical logs was collected from six test holes at three sites and analyzed to delineate the penetrated stratigraphic units and characterize their lithology and physical properties. Flow and fluid-property logs were collected from two wells at one of the sites and analyzed along with the other geophysical logs to determine the relative transmissivity of the High Plains aquifer units. The integrated log …


Circulation And Water Property Variations In The Nearshore Alaskan Beaufort Sea (1999 – 2007), Thomas J. Weingartner, Seth L. Danielson, Jeremy L. Kasper, Stephen R. Okkonen Jan 2009

Circulation And Water Property Variations In The Nearshore Alaskan Beaufort Sea (1999 – 2007), Thomas J. Weingartner, Seth L. Danielson, Jeremy L. Kasper, Stephen R. Okkonen

Publications of the US Geological Survey

Six years of current meter and water property data were collected year-round (1999 – 2007) from the landfast ice zone of the nearshore Alaskan Beaufort Sea (ABS). The data show large seasonal differences in the circulation that is defined by the set-up and breakup of the landfast ice. During the open water season (July – mid-October) mid-depth currents often exceed 20 cm-s-1, whereas during the landfast ice season (mid-October – June) these currents are generally <10 cm-s-1. Tidal currents are feeble (<3 cm-s-1) year-round and probably do not play a dynamically significant role on the inner shelf.

Most ( …


Greater Platte River Basins–Science To Sustain Ecosystems And Communities Jan 2009

Greater Platte River Basins–Science To Sustain Ecosystems And Communities

Publications of the US Geological Survey

The Greater Platte River Basins (GPRB), located in the heartland of the United States, provides a collaborative opportunity for the U.S. Geological Survey (USGS) and its partners to understand the sustainability of natural and managed ecosystems under changing climate and resource requirements. The Greater Platte River Basins, an area of about 140,000 square miles, sustains thousands of acres of lakes and wetlands, which provide a staging and resting area for the North American Central Flyway. Part of the GPRB is within the U.S. Corn Belt, one of the most productive agricultural ecosystems on Earth. Changes in water and land use, …


Channel Morphology And Bed Sediment Characteristics Before And After Habitat Enhancement Activities In The Uridil Property, Platte River, Nebraska, Water Years 2005–2008, Paul J. Kinzel Jan 2009

Channel Morphology And Bed Sediment Characteristics Before And After Habitat Enhancement Activities In The Uridil Property, Platte River, Nebraska, Water Years 2005–2008, Paul J. Kinzel

Publications of the US Geological Survey

Fluvial geomorphic data were collected by the United States Geological Survey from July 2005 to June 2008 (a time period within water years 2005 to 2008) to monitor the effects of habitat enhancement activities conducted in the Platte River Whooping Crane Maintenance Trust’s Uridil Property, located along the Platte River, Nebraska. The activities involved the removal of vegetation and sand from the tops of high permanent islands and the placement of the sand into the active river channel. This strategy was intended to enhance habitat for migratory water birds by lowering the elevations of the high islands, thereby eliminating a …


Hydrodynamic Simulations Of Physical Aquatic Habitat Availability For Pallid Sturgeon In The Lower Missouri River, At Yankton, South Dakota, Kenslers Bend, Nebraska, Little Sioux, Iowa, And Miami, Missouri, 2006–07, Robert B. Jacobson, Harold E. Johnson Iii, Benjamin J. Dietsch Jan 2009

Hydrodynamic Simulations Of Physical Aquatic Habitat Availability For Pallid Sturgeon In The Lower Missouri River, At Yankton, South Dakota, Kenslers Bend, Nebraska, Little Sioux, Iowa, And Miami, Missouri, 2006–07, Robert B. Jacobson, Harold E. Johnson Iii, Benjamin J. Dietsch

Publications of the US Geological Survey

The objective of this study was to assess the sensitivity of habitat availability in the Lower Missouri River to discharge variation, with emphasis on habitats that might support spawning of the endangered pallid sturgeon. We constructed computational hydrodynamic models for four reaches that were selected because of evidence that sturgeon have spawned in them. The reaches are located at Miami, Missouri (river mile 259.6–263.5), Little Sioux, Iowa (river mile 669.6–673.5), Kenslers Bend, Nebraska (river mile 743.9–748.1), and Yankton, South Dakota reach (river mile 804.8–808.4). The models were calibrated for a range of measured flow conditions, and run for a range …


Riparian And Associated Habitat Characteristics Related To Nutrient Concentrations And Biological Responses Of Small Streams In Selected Agricultural Areas, United States, 2003–04, Ronald B. Zelt, Mark D. Munn Jan 2009

Riparian And Associated Habitat Characteristics Related To Nutrient Concentrations And Biological Responses Of Small Streams In Selected Agricultural Areas, United States, 2003–04, Ronald B. Zelt, Mark D. Munn

Publications of the US Geological Survey

Physical factors, including both in-stream and riparian habitat characteristics that limit biomass or otherwise regulate aquatic biological condition, have been identified by previous studies. However, linking the ecological significance of nutrient enrichment to habitat or landscape factors that could allow for improved management of streams has proved to be a challenge in many regions, including agricultural landscapes, where many ecological stressors are strong and the variability among watersheds typically is large. Riparian and associated habitat characteristics were sampled once during 2003–04 for an intensive ecological and nutrients study of small perennial streams in five contrasting agricultural landscapes across the United …