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Articles 271 - 289 of 289
Full-Text Articles in Physical Sciences and Mathematics
Water Quality In The Central Nebraska Basins, Nebraska, 1992-95, S. A. Frenzel, R. B. Swanson, T. L. Huntzinger, J. K. Stamer, P. J. Emmons, Ronald B. Zelt
Water Quality In The Central Nebraska Basins, Nebraska, 1992-95, S. A. Frenzel, R. B. Swanson, T. L. Huntzinger, J. K. Stamer, P. J. Emmons, Ronald B. Zelt
Publications of the US Geological Survey
This report is intended to summarize major findings that emerged between 1992 and 1995 from the water-quality assessment of the Central Nebraska Basins Study Unit and to relate these findings to water-quality issues of regional and national concern. The information is primarily intended for those who are involved in waterresource management. Indeed, this report addresses many of the concerns raised by regulators, water-utility managers, industry representatives, and other scientists, engineers, public officials, and members of stakeholder groups who provided advice and input to the USGS during this NAWQA Study-Unit investigation. Yet, the information contained here may also interest those who …
Modeling Density Currents In Circular Clarifiers, Scott A. Wells, David M. Laliberte
Modeling Density Currents In Circular Clarifiers, Scott A. Wells, David M. Laliberte
Civil and Environmental Engineering Faculty Publications and Presentations
Design of sedimentation tanks for solid-liquid separation is often dependent on assuming ideal flow conditions. But the geometry of the tank and density currents as a result of temperature and suspended solids influences the fluid mechanics of the tank and can result in significant deviations from ideal flow.
A two-dimensional radial flow model was proposed which incorporated the effect of density currents resulting from temperature and suspended solids differentials within the tank. The numerical model predicted the steady-state, layer-averaged radial flow and layer depth.
The model solution and field data showed that the momentum and suspended solids of the inflow …
Phosphorus In The Landscape: Diffuse Sources To Surface Waters. Land And Water Resources Research And Development Corporation. Occasional Paper 16/98, Richard Davis, Anne Hamblin, E O'Loughlin, Nic Austin, R Banens, P Cornish, P Hairsin, M Mcculloch, Phil Moody, J Olley, B Prove, I Smalls, David Weaver
Phosphorus In The Landscape: Diffuse Sources To Surface Waters. Land And Water Resources Research And Development Corporation. Occasional Paper 16/98, Richard Davis, Anne Hamblin, E O'Loughlin, Nic Austin, R Banens, P Cornish, P Hairsin, M Mcculloch, Phil Moody, J Olley, B Prove, I Smalls, David Weaver
All other publications
The National Eutrophication Management Program (NEMP) and Environment Australia convened a workshop to develop a coherent overview of the sources and transport of diffuse phosphorus in Australian catchments based on the latest knowledge. The Land and Water Resources Research and Development Corporation (LWRRDC) and the Murray–Darling Basin Commission (MDBC) jointly fund NEMP. A select group of scientists attended the workshop and developed a coherent statement about phosphorus sources and transport in Australian catchments. The group did not extend this statement to include recommended management practices. This paper reports the findings from the workshop. State governments have developed algal and nutrient …
A Preliminary Assessment Of Wave, Current, And Sediment Interactions On The Louisiana Shoreface Adjacent To The Isles Dernieres, David A. Pepper, Gregory W. Stone, Ping Wang
A Preliminary Assessment Of Wave, Current, And Sediment Interactions On The Louisiana Shoreface Adjacent To The Isles Dernieres, David A. Pepper, Gregory W. Stone, Ping Wang
Geology Faculty Publications
The Louisiana coast is generally characterized as a low wave-energy environment where sediment transport is dominated by the influence of the Mississippi and the Atchafalaya Rivers. Winter cold fronts, however, generate waves and currents that have a significant impact on a variety of Louisiana’s coastal environments, although field data regarding their influence on the inner shelf are extremely sparse. During a 12-d period that included the passage of two cold fronts, waves and near-bed currents were measured on the Louisiana inner-shelf (depth-8 m) using a sophisticated bottom-mounted instrumentation system. Bottom boundary layer parameters were then calculated using wave-current interaction models, …
South Central Nebraska Geology Field Trip Conservation And Survey Division-Ianr-Unl & Nebraska Well Drillers Association, Conservation Survey Division
South Central Nebraska Geology Field Trip Conservation And Survey Division-Ianr-Unl & Nebraska Well Drillers Association, Conservation Survey Division
Conservation and Survey Division
No abstract provided.
Estimation Of Suspended Sediment Concentration In Water Using Integrated Surface Reflectance, Mahtab A. Lodhi, Donald C. Rundquist, Luoheng Han, Mark S. Kuzila
Estimation Of Suspended Sediment Concentration In Water Using Integrated Surface Reflectance, Mahtab A. Lodhi, Donald C. Rundquist, Luoheng Han, Mark S. Kuzila
Conservation and Survey Division
No abstract provided.
Colfax County Test Hole Logs, Frank A. Smith, Raymond R. Burchett
Colfax County Test Hole Logs, Frank A. Smith, Raymond R. Burchett
Conservation and Survey Division
No abstract provided.
Dodge County Test Hole Logs, Frank A. Smith, Raymond R. Burchett
Dodge County Test Hole Logs, Frank A. Smith, Raymond R. Burchett
Conservation and Survey Division
No abstract provided.
Harlan County Test Hole Logs, Raymond R. Burchett
Harlan County Test Hole Logs, Raymond R. Burchett
Conservation and Survey Division
No abstract provided.
Earthquakes In Nebraska, R. R. Burchett
Earthquakes In Nebraska, R. R. Burchett
Conservation and Survey Division
No abstract provided.
Oil And Gas Fields In Nebraska, R. R. Burchett
Oil And Gas Fields In Nebraska, R. R. Burchett
Conservation and Survey Division
No abstract provided.
Mineral Facts For Nebraska, Excluding Oil And Gas, R. R. Burchett
Mineral Facts For Nebraska, Excluding Oil And Gas, R. R. Burchett
Conservation and Survey Division
No abstract provided.
Oil And Gas Facts For Nebraska, R. R. Burchett
Oil And Gas Facts For Nebraska, R. R. Burchett
Conservation and Survey Division
No abstract provided.
Planning To Grow Vegetables Commercially, John Burt, Peter Gartrell
Planning To Grow Vegetables Commercially, John Burt, Peter Gartrell
Bulletins 4000 -
This Bulletin was developed by Department of Agriculture in recognition of the increasing complexity and competitiveness in establishing a commercial vegetable enterprise. The information in this Bulletin will provide you with a useful guide to assess your likelihood of succeeding in vegetable production.
Vegetable production is not an easy lifestyle. It is a highly competitive environment with the industry consisting of growers with big investments and years of experience and knowledge. Horticultural farms require a large amount of capital and time and are increasingly expanding and becoming more specialised.
If you are serious about growing vegetables, work through this Bulletin …
Active Tectonics And Ultrahigh-Pressure Rocks, Ann Blythe
Active Tectonics And Ultrahigh-Pressure Rocks, Ann Blythe
Ann Blythe
This chapter compares modern exhumation and surface uplift rates with the rates needed for the preservation of ultrahigh pressure (UHP) metamorphic rocks. The highest recorded exhumation rates of ~ 5–10 mm/a are inferred from isotopic and fission-track analyses in the Himalaya, Southern Alps of New Zealand, and D’Entrecasteaux Islands. Similar rates (~7 mm/a) of surface uplift are measured from leveling surveys in Nepal and correlations of marine terraces in the Southern Alps. In Nepal, however, this surface uplift rate is occurring despite erosion, and the true rate of surface uplift is probably considerably higher. In restraining bends along the San …
Longitudinal Study Of Dental Development In Chimpanzees Of Known Chronological Age: Implications For Understanding The Age At Death Of Plio-Pleistocene Hominids, Robert Anemone, Mark Mooney
Longitudinal Study Of Dental Development In Chimpanzees Of Known Chronological Age: Implications For Understanding The Age At Death Of Plio-Pleistocene Hominids, Robert Anemone, Mark Mooney
Robert L. Anemone
Reconstruction of life history variables of fossil hominids on the basis of dental development requires understanding of and comparison with the pattern and timing of dental development among both living humans and pongids. Whether dental development among living apes or humans provides a better model for comparison with that of Plio-Pleistocene hominids of the genus Australopithecus remains a contentious point. This paper presents new data on chimpanzees documenting developmental differences in the dentitions of modern humans and apes and discusses their significance in light of recent controversies over the human or pongid nature of australopithecine dental development. Longitudinal analysis of …
Biogeography Of The Late Paleocene Benthic Foraminiferal Extinction, Ellen Thomas
Biogeography Of The Late Paleocene Benthic Foraminiferal Extinction, Ellen Thomas
Ellen Thomas
During the Late Paleocene Thermal Maximum (LPTM) benthic foraminifera at middle bathyal and greater depths suffered extinction of 30-50% of species during a few thousand years. Extinction was less severe at neritic to upper bathyal depths, where temporary changes in faunal composition prevailed. Pre-extinction deep-sea faunas were cosmopolitan and diverse, and contained heavily calcified species. Immediate post-extinction faunas were more variable geographically, exhibited low diversity, and were dominated by thin-walled calcareous or agglutinated taxa, possibly because CaCO3 dissolution increased globally from neritic to abyssal depths just before the extinction. These assemblages were dominated either by long-lived taxa such as Nuttallides …
Strategies Of Representation, Relationship, And Resistance: British Women Travelers And Mormon Plural Wives, C. 1870-1890, Karen M. Morin, J.K. Guelke
Strategies Of Representation, Relationship, And Resistance: British Women Travelers And Mormon Plural Wives, C. 1870-1890, Karen M. Morin, J.K. Guelke
Karen M. Morin
During the 1870s and 1880s, several British women writers traveled by transcontinental railroad across the American West via Salt Lake City, Utah, the capital of the Church of Jesus Christ of Latter-day Saints, or Mormons. These women subsequently wrote books about their travels for a home audience with a taste for adventures in the American West, and particularly for accounts of Mormon plural marriage, which was sanctioned by the Church before 1890. "The plight of the Mormon woman," a prominent social reform and literary theme of the period, situated Mormon women at the center of popular representations of Utah during …