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Articles 1 - 30 of 49
Full-Text Articles in Physical Sciences and Mathematics
Sulfide In Surface Waters Of The Western Atlantic Ocean, Gregory A. Cutter, Christian F. Krahforst
Sulfide In Surface Waters Of The Western Atlantic Ocean, Gregory A. Cutter, Christian F. Krahforst
OES Faculty Publications
Using newly developed techniques, some preliminary data on hydrogen sulfide in surface waters of the western Atlantic have been obtained. Concentrations of total sulfide range from <0.1 to 1.1 nmol/L, and vary on a diel basis. At these concentrations, sulfide may affect the cycling of several trace metals via the formation of stable complexes. Production of sulfide in oxygenated seawater may occur through the hydrolysis of carbonyl sulfide or by sulfate reduction within macroscopic particles in the water column. Removal mechanisms can include oxidation, complexation with particulate trace metals, and metal sulfide precipitation. However, the temporal and spatial distributions suggest a complex set of processes governing the behavior of sulfide in the surface ocean.
River Potholes: Modern And Ancient, Robert F. Diffendal Jr.
River Potholes: Modern And Ancient, Robert F. Diffendal Jr.
Robert F. Diffendal, Jr., Publications
A river pothole is a cylindrical, bowl-shaped, or irregular hollow that is usually deeper than wide. It is formed in the rocky bed of a stream by either the grinding action of sediment whirled around by stream eddies or the force of fast flowing water. Potholes usually have spirally grooved surfaces. Their widths and depths range from a few inches to many feet. Potholes on the floor of the Susquehanna River near Columbia, Pennsylvania, for example, are large enough to hold objects the size of a small car.
Potholes generally are formed in fairly homogeneous rock by streams that at …
Ua66/8/3 Geogram, Wku Geography & Geology
Ua66/8/3 Geogram, Wku Geography & Geology
WKU Archives Records
Newsletter created by and about the WKU Geography & Geology highlighting activities of faculty, students and alumni.
Virtually Interactive Large-Scale Model For Arkansas: User's Guide (Vilma), Rosalinda R. A. Cantiller, Richard C. Peralta
Virtually Interactive Large-Scale Model For Arkansas: User's Guide (Vilma), Rosalinda R. A. Cantiller, Richard C. Peralta
Technical Reports
This user’s guide supports the use of VILMA (Virtually Interactive Large-scale Model for Arkansas). This document presents the basic concepts in Chapter I. Chapter II discusses the execution steps that the user follows during a VILMA session. Chapter III provides a detailed illustration of example data files. Chapter IV presents two example VILMA sessions. Finally, Chapter V elaborates on additional concepts. The Appendices consist of relevant program listings, instructions, and example files. In this user’s guide, the word "interactive" means the user enters his responses to the prompts that appear on a computer terminal while he is logged on to …
The Use Of Down-Hole Video To Evaluate Parameters Affecting Removal Of Storm Water Runoff Into A Karst Aquifer In Bowling Green, Kentucky, Philip Reeder
Masters Theses & Specialist Projects
Due to recent land use changes, runoff has greatly increased In Bowling Green, necessitating the drilling of nearly 600 drainage wells to direct storm water into the Lost River Karst Aquifer. Research was conducted to (1) differentiate areas of the city as optimal for removal of storm water runoff, (2) correlate lithologic features between wells, and (3) determine optimal depths to which new drainage wells should be drilled. This was accomplished using maximum capacity tests, correlation of lithologic features between wells and comparing void density to depth below the land surface.
It was only possible to develop general trends in …
Groundwater Levels In Nebraska, 1987, Michael J. Ellis, Perry B. Wigley
Groundwater Levels In Nebraska, 1987, Michael J. Ellis, Perry B. Wigley
Conservation and Survey Division
No abstract provided.
Singleton Ranch Quadrangle, Nebraska—Banner, Kimball, And Cheyenne Counties, 7.5 Minute Series (Topographic), Robert F. Diffendal Jr.
Singleton Ranch Quadrangle, Nebraska—Banner, Kimball, And Cheyenne Counties, 7.5 Minute Series (Topographic), Robert F. Diffendal Jr.
Robert F. Diffendal, Jr., Publications
Singleton Ranch Quadrangle, Nebraska—Banner, Kimball, and Cheyenne Counties
7.5 minute series (topographic), scale 1:24000
103°22'30" to 103°30'
41°22'30" to 41°30'
Toa, Ql, Qalc
June 13, 1988
Qualitative And Quantitative Aquatic Algal Data Compilation To Determine Macrotrends - Iv, Richard L. Meyer
Qualitative And Quantitative Aquatic Algal Data Compilation To Determine Macrotrends - Iv, Richard L. Meyer
Technical Reports
A data base of the algae of Arkansas ecoregions has been estabblished by the use of a relational data base management system (dBase III plus). The system was chosen to be readily available for a variety of microcomputers using MS- and PC-DOS. The data base contains taxonomic fields from division through variety, synonymy, authors, initial description, date, and definitive descriptive source. The data are cross-referenced by ecoregion, Round's community and subcommunity designations. The data base contains greater than 1,500 taxonomic records in all divisions and classes of freshwater algae. The data are sortable by any of the included parameters. The …
Development Of A Combined Quantity And Quality Model For Optimal Management Of Unsteady Groundwater Flow Fields, R. C. Peralta, J. Solaimanian, C. L. Griffis
Development Of A Combined Quantity And Quality Model For Optimal Management Of Unsteady Groundwater Flow Fields, R. C. Peralta, J. Solaimanian, C. L. Griffis
Technical Reports
Presented are alternative techniques for including conservative solute transport within computer models for optimizing groundwater extraction rates. Unsteady two-dimensional flow and dispersed conservative solute transport are assumed. Comparisons are made of the practicality of including modified forms of implicit and explicit finite difference solute transport equations within optimization models. These equations can be calibrated and subsequently used within a MODCON procedure. The MODCON modelling procedure consists of an integrated series of five optimization or simulation modules. The procedure is applicable for either an entire aquifer system or for a subsystem of a larger system. The first module, A, computes physically …
Long-Term Reconstruction And Analysis Of White River Streamflow, M. K. Cleaveland, D. W. Stahle, J. G. Hehr
Long-Term Reconstruction And Analysis Of White River Streamflow, M. K. Cleaveland, D. W. Stahle, J. G. Hehr
Technical Reports
A 281-year reconstruction of White River annual runoff at Clarendon, Arkansas, was developed from a regional average of nine Oklahoma, Missouri, and Arkansas tree-ring chronologies (six post oak, Quercus stellata, and three baldcypress, Taxodium distichum). Inhomogeneity of the gaged series was detected with both double mass analysis (using state average total annual Arkansas precipitation) and regression (using the regional tree-ring average). Simple regression calibrated the homogeneous runoff data with the average ring width data from 1930 to 1980. Comparing the reconstruction with independent data verified the regression model. Variance of the reconstruction increases significantly during the 20th century, a change …
Estimated Use Of Water In Nebraska, 1985, Eugene K. Steele Jr.
Estimated Use Of Water In Nebraska, 1985, Eugene K. Steele Jr.
Conservation and Survey Division
No abstract provided.
Estimating Potential Ground And Surface Water Pollution From Land Application Of Poultry Litter - Ii, D. C. Wolf, J. T. Gilmour, P. M. Gale
Estimating Potential Ground And Surface Water Pollution From Land Application Of Poultry Litter - Ii, D. C. Wolf, J. T. Gilmour, P. M. Gale
Technical Reports
In Arkansas, approximately 1 Tg of poultry (Gallus gallus domesticus) manure and litter is produced annually. These waste products are commonly applied to pastures as a soil amendment or fertilizer, but excessive application rates and poor management practices could result in nutrient contamination of ground and surface water. The purpose of this study was to: (1) assess the nutrient concentrations in poultry manure and (2) evaluate the nitrogen loss from land-applied poultry litter and manure due to ammonia volatilization and denitrification. Analyses for total Kjeldahl nitrogen (TKN), inorganic nitrogen (Ni), phosphorus (P), and potassium (K) were compared in 12 wet …
A Guide To The Practical Use Of Aerial Color-Infrared Photography In Agriculture, Donald C. Rundquist, Scott A. Samson
A Guide To The Practical Use Of Aerial Color-Infrared Photography In Agriculture, Donald C. Rundquist, Scott A. Samson
Conservation and Survey Division
No abstract provided.
Redington Quadrangle, Nebraska—Banner And Morrill Counties, 7.5 Minute Series (Topographic), Robert F. Diffendal Jr.
Redington Quadrangle, Nebraska—Banner And Morrill Counties, 7.5 Minute Series (Topographic), Robert F. Diffendal Jr.
Robert F. Diffendal, Jr., Publications
Redington Quadrangle, Nebraska—Banner and Morrill Counties
7.5 minute series (topographic), scale 1:24000
103°15' to 103°22'30"
41°30' to 41°37'30"
Twb, Qalc, Toa, IW, Tamch, Lower Whitney, Upper Whitney
April 5, 1988
Instream Flow Water Rights: Arizona’S Approach, Herb Dishlip
Instream Flow Water Rights: Arizona’S Approach, Herb Dishlip
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
15 pages.
Agenda: Instream Flow Protection In The Western United States: A Practical Symposium, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Instream Flow Protection In The Western United States: A Practical Symposium, University Of Colorado Boulder. Natural Resources Law Center
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
Conference speakers included University of Colorado School of Law professors Lawrence J. MacDonnell and Charles F. Wilkinson.
Virtually all western states now provide some kind of legal recognition for instream flows. On March 31-April 1, the Natural Resources Law Center will present a symposium on the different approaches taken in these states, with emphasis on such major issues as the purposes for instream flows, the quantities of water needed for these purposes, enforcement of instream flow rights, federal instream flow claims, private instream flow claims, and transferring consumptive water rights to instream flow rights. Speakers include representatives from state agencies …
Oregon’S Minimum Perennial Streamflows, John Borden
Oregon’S Minimum Perennial Streamflows, John Borden
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
12 pages.
Private Appropriation Of Instream Flows In Alaska, Mary Lu Harle
Private Appropriation Of Instream Flows In Alaska, Mary Lu Harle
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
30 pages.
Contains 2 pages of footnotes and 3 pages of references.
Establishing The Quantity Of Necessary Flow, Berton L. Lamb
Establishing The Quantity Of Necessary Flow, Berton L. Lamb
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
26 pages (includes illustrations).
Contains footnotes and 3 pages of references.
Colorado’S Instream Flow Program: Protecting Free-Flowing Streams In A Water Consumptive State, Steven J. Shupe
Colorado’S Instream Flow Program: Protecting Free-Flowing Streams In A Water Consumptive State, Steven J. Shupe
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
30 pages.
Contains footnotes.
Instream Flows In Idaho, Josephine P. Beeman, Kenneth R. Arment
Instream Flows In Idaho, Josephine P. Beeman, Kenneth R. Arment
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
23 pages.
Contains footnotes.
The Protection Of Instream Flows In Montana: A Legal-Institutional Perspective, Matthew J. Mckinney, Gary Fritz, Patrick Graham, Deborah Schmidt
The Protection Of Instream Flows In Montana: A Legal-Institutional Perspective, Matthew J. Mckinney, Gary Fritz, Patrick Graham, Deborah Schmidt
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
42 pages.
Contains references.
Wyoming’S New Instream Flow Law, Gordon W. Fassett
Wyoming’S New Instream Flow Law, Gordon W. Fassett
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
28 pages.
Contains references.
Protecting Instream Resources In Washington State, Robert F. Barwin, Kenneth Slattery, Steven J. Shupe
Protecting Instream Resources In Washington State, Robert F. Barwin, Kenneth Slattery, Steven J. Shupe
Instream Flow Protection in the Western United States: A Practical Symposium (March 31-April 1)
56 pages (includes 1 map).
Contains 10 pages of footnotes.
Lisco Nw Quadrangle, Nebraska—Garden, Morrill, And Cheyenne Counties, 7.5 Minute Series (Topographic), Robert F. Diffendal Jr.
Lisco Nw Quadrangle, Nebraska—Garden, Morrill, And Cheyenne Counties, 7.5 Minute Series (Topographic), Robert F. Diffendal Jr.
Robert F. Diffendal, Jr., Publications
Lisco NW Quadrangle, Nebraska—Garden, Morrill, and Cheyenne Counties
7.5 minute series (topographic), scale 1:24,000
102°37'30" to 102°45'
41°22'30" to 41°30'
March 31, 1988
Mud Springs Quadrangle, Nebraska—Morrill And Cheyenne Counties, 7.5 Minute Series (Topographic), Robert F. Diffendal Jr.
Mud Springs Quadrangle, Nebraska—Morrill And Cheyenne Counties, 7.5 Minute Series (Topographic), Robert F. Diffendal Jr.
Robert F. Diffendal, Jr., Publications
Mud Springs Quadrangle, Nebraska—Morrill and Cheyenne Counties
7.5 minute series (topographic), scale 1:24,000
103° to 103°07'30"
41°22'30" to 41°30'
Toa (Coarse sand and cobble gravel)
March 25, 1988
Lawrence Fork / Potter 2 Ne Quadrangle, Nebraska—Banner, Morril, And Cheyenne Counties, 7.5 Minute Series (Topographic), Robert F. Diffendal Jr.
Lawrence Fork / Potter 2 Ne Quadrangle, Nebraska—Banner, Morril, And Cheyenne Counties, 7.5 Minute Series (Topographic), Robert F. Diffendal Jr.
Robert F. Diffendal, Jr., Publications
Lawrence Fork / Potter 2 NE Quadrangle, Nebraska—Banner, Morril, and Cheyenne Counties
7.5 minute series (topographic), scale 1:24,000
103°15' to 103°22'30"
41°22'30" to 41°30'
Toa, Twb, Qalc, IW
March 1988
Hydrogeology Of Garfield And Wheeler Counties, Nebraska, Dennis R. Lawton, Robert A. Hiergesell
Hydrogeology Of Garfield And Wheeler Counties, Nebraska, Dennis R. Lawton, Robert A. Hiergesell
Conservation and Survey Division
No abstract provided.
Detailed Glaciochemical Investigations In Southern Victoria Land, Antarctica―A Proxy Climate Record, Paul Andrew Mayewski, Mark S. Twickler
Detailed Glaciochemical Investigations In Southern Victoria Land, Antarctica―A Proxy Climate Record, Paul Andrew Mayewski, Mark S. Twickler
Earth Science Faculty Scholarship
Advances in climate prediction depend on a knowledge of historical climatic sequences ranging in scale from decades to Millennia. Proxy data produced by pollen, sediment, tree rings,glacier fluctuations, and ice and snow cores are valuable in the construction of climatic sequences when direct observations of the atmosphere are either spatially or temporally lacking. Links between proxy data and the atmosphere generate the most confidence when actual components of climate are preserved in the proxy medium.
Ice-Core Records And Ozone Depletion—Potential For A Proxy Ozone Record, Paul Andrew Mayewski, Mary Jo Spencer, William Berry Lyons, Mark S. Twickler, J. Dibb
Ice-Core Records And Ozone Depletion—Potential For A Proxy Ozone Record, Paul Andrew Mayewski, Mary Jo Spencer, William Berry Lyons, Mark S. Twickler, J. Dibb
Earth Science Faculty Scholarship
Time-series of the ionic composition in polar ice cores can provide detailed direct and proxy records of seasonal to Millenial scale fluctuations in climate, atmospheric chemistry, and volcanic activity. Even though problems of species-source links and air/snow fractionation have not all been entirely resolved,the fact remains that ice cores currently hold the best hope of retrieving detailed paleo-atmospheric records. While direct links between the chemistry in ice cores and the ozone depletion phenomenon cannot be guaranteed, ice-core records provide the only means by which signals related to the ozone cycle can be produced for pre-measurement periods or for unmonitored sites. …