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Articles 5761 - 5790 of 7341
Full-Text Articles in Physical Sciences and Mathematics
Ion Temperature Variations In The Daytime High-Latitude F Region, Robert W. Schunk, Jan Josef Sojka
Ion Temperature Variations In The Daytime High-Latitude F Region, Robert W. Schunk, Jan Josef Sojka
All Physics Faculty Publications
We improved our high-latitude ionospheric model by including thermal conduction and diffusion-thermal heat flow terms in the ion energy equation so that we could study the ion temperature variations in the daytime high-latitude F layer in a region poleward of the auroral oval for steady state conditions at local noon. From our study we found that (1) The variation of Ti with solar cycle, season, and geomagnetic activity closely follows the Tn variation. The general trend is for higher temperatures in summer than in winter, at solar maximum than at solar minimum, and for active magnetic conditions than for quiet …
Observations Of The Diurnal Dependence Of The High-Latitude F Region Ion Density By Dmsp Satellites, Jan Josef Sojka, W. John Raitt, Robert W. Schunk, F. J. Rich, R. C. Sagalyn
Observations Of The Diurnal Dependence Of The High-Latitude F Region Ion Density By Dmsp Satellites, Jan Josef Sojka, W. John Raitt, Robert W. Schunk, F. J. Rich, R. C. Sagalyn
All Physics Faculty Publications
Data from the DMSP F2 and F4 satellites for the period December 5-10, 1979, have been used to study the diurnal dependence of the high-latitude ion density at 800-km altitude. A 24-hour periodicity in the minimum orbital density (MOD) during a crossing of the high-latitude region is observed in both the winter and summer hemispheres. The phase of the variation in MOD is such that it has a minimum during the 24-hour period between 0700 and 0900 UT. Both the long term variation of the high-latitude ion density on a time scale of days, and the orbit by orbit variations …
Cyclotron Resonance Effects On Stochastic Acceleration Of Light Ionospheric Ions, Nagendra Singh, Robert W. Schunk, Jan Josef Sojka
Cyclotron Resonance Effects On Stochastic Acceleration Of Light Ionospheric Ions, Nagendra Singh, Robert W. Schunk, Jan Josef Sojka
All Physics Faculty Publications
Numerical studies on the interaction of electrostatic hydrogen cyclotron (EHC) waves with light ionospheric ions, such as He+, show that when the wave number ratio k⊥/kll ≤ 10 resonant effects are important in the stochastic heating of the ions. When k⊥/kll > 10 an appreciable acceleration occurs even though the cyclotron‐resonant effects are absent. As the parallel wave number increases, causing k⊥/kll to decrease (< 10), the number of accelerated ions and the perpendicular and parallel energization increase.
Consumptive Use And Water Requirements For Utah, A. Leon Huber, Frank W. Haws, Trevor C. Hughes, Jay M. Bagley
Consumptive Use And Water Requirements For Utah, A. Leon Huber, Frank W. Haws, Trevor C. Hughes, Jay M. Bagley
Reports
Foreword: Studies on the meteorological determinants of evapotranspiration were initiated at least as long ago as the 1920s and by the late 1940s had produced the Blaney-Criddle method for estimating crop consumptive use. The resulting ability to estimate water requirements by both location and crop added a new scientific dimension to water rights administration that was first introduced into the courts of Utah during adjudication of water rights in the Escalante Valley in 1949. Application of the consumptive use concept to water rights administration and water resources planning, however, required a wirtten reference. Technical Publication No. 8 entitled "Consumptive Use …
Predicted Limnology Of The Proposed Ridges Basin Reservoir, Lawrence A. Baker, V. Dean Adams
Predicted Limnology Of The Proposed Ridges Basin Reservoir, Lawrence A. Baker, V. Dean Adams
Reports
A limnological evaluation was conducted for the offstream Ridges Basin Reservoir proposed by the Bureau of Reclamation in southwest Colorado. The study required the determination of existing water quality in the source river and use of the information to predict the algal standing crop, hypolimnetic oxygen deficity, Secchi disk transparency, and retention of metals in the proposed reservoir. A water quality study was conducted between May 1977 and August 1978. Samplse were collected from the Animas River, which will provide the inflow to the proposed reservoir, and from the La Plata River, which will receive discharge from the reservoir. Samples …
Removal Of Nitrogen From Secondary Wastewater Effluent Through No 3-N Reduction Using Sulfur Dioxide (So2), Javid Ghorashian, V. Dean Adams, Dennis B. George
Removal Of Nitrogen From Secondary Wastewater Effluent Through No 3-N Reduction Using Sulfur Dioxide (So2), Javid Ghorashian, V. Dean Adams, Dennis B. George
Reports
The overall purpose of this study was to evaluate the ability of sulfur dioxide (SO2) to remove nitrate-nigrogen (i.e., reduction to a gaseous form) from the secondary wastewater effluent. To accomplish th above task, a jar test procedure was established and the concentration of NO3-N along with the concentration of NH3-N present in the secondary wastewater, treated with SO2, were measured initially and after 10 min, 20 min, 30 min, 40 min, and 24 hr. Then, the percent NO3-N removal was calculated, comparing the NO3-H concentrations measured in each treatment with the initial values. The above procedures were conducted for …
Energy Impacts Of Water Based Recreation, J. Clair Batty, David A. Bell, E. Bruce Godfrey, Craig Howell, J. Paul Riley, Thomas C. Stoddard
Energy Impacts Of Water Based Recreation, J. Clair Batty, David A. Bell, E. Bruce Godfrey, Craig Howell, J. Paul Riley, Thomas C. Stoddard
Reports
The overall objective of the study reported here was to determine to what extent energy accounting could supplement and/or complement economic benfit/cost analyses of water management projects and to specifically examine the energy impacts of water based recreation. The energy accounting literature was carefully reviewed and an energy accounting methodology applicable to water management was devised. Data pertaining to receation at five reservoirs in Utah were assembled from visitation recoreds and on-site surveys. Energy requirements for site construction, travel to and from the recreation site, and recreation at the site were estimated. It was determined that energy devoted to water …
Defining Stream Fish Microhabitat Requirements For Water Project Planning, William T. Helm
Defining Stream Fish Microhabitat Requirements For Water Project Planning, William T. Helm
Reports
Brown trout daily activities were divided into two braod categories, resting and feeding, and the population was divided into three size groups (one of which is reported on here), based on the timing and location of these activities. Microhabitat components, measured previously in four rivers at sites occupied by fish, were utilized to develop usable componenet ranges for each size group and activity to illustrate the breadth of component values utilized out of the total range available. Microhabitat is thus described as a range of numerical values for each componenet of a specific set of components. A 90 meter section …
Guidelines For Minimizing Salinity Buildup In Groundwaters Of Utah, Edward P. Fisk, Calvin G. Clyde
Guidelines For Minimizing Salinity Buildup In Groundwaters Of Utah, Edward P. Fisk, Calvin G. Clyde
Reports
In arid Utah practically all of the replenishable surface water supplies are nearly fully developed. At least some groundwater resources are being used in every basin. Groundwater use is expanding throughout the state and in some areas the draft is nearly equal to the sustained yield. Irrigated agriculture is the major water user. Multiple reuse of water is common in many areas, but as salinity increases with each cycle of usage, salinity also is usually the limiting factor for usefulness. Effective control of salinity buildup will permit more efficient and more extensive use of the state’s waters with potentially large …
The Water Requirements And Pollutant Potential In The Gasification Of Carbonaceous Shales, Jeffery A. Cissell, V. Dean Adams, Joel E. Fletcher, Daniel S. Filip, Dennis B. George
The Water Requirements And Pollutant Potential In The Gasification Of Carbonaceous Shales, Jeffery A. Cissell, V. Dean Adams, Joel E. Fletcher, Daniel S. Filip, Dennis B. George
Reports
A laboratory-scale, batch operated gasifier was used to evaluate the heating value, process and cooling water requirements, and water pollution potential of gasification of carbonaceous shales. These potentially valuable fossil fuels are found over large areas of Southern and Eastern Utah and vary widely in quality depending on the amount of intermixed inorganic material. The results indicate that a synthesis gas, consisting primarily of hydrogen and carbon monoxide, can be produced from carbonaceous shales. The total heating values of the synthesis gas from the carbon shales examined ranged from 4 to 62 percent of that of coal. The process water …
Hydraulics And Numerical Solutions Of Steady-State But Spatially Varied Debris Flow, Alfredo A. Deleon, Roland W. Jeppson
Hydraulics And Numerical Solutions Of Steady-State But Spatially Varied Debris Flow, Alfredo A. Deleon, Roland W. Jeppson
Reports
Debris flow is a natural phenomenon triggered by special conditions that combine: high intensity rainfall, material available for transport, slopes steep enough to induce flowage, and insufficient protection of the ground by vegetation and/or other erosion control means. These conditions are very common in semiarid and arid regions in Utah, other Western states and many other parts of the globe. Previously, the two models proposed to solve debris flow are the Bingham plastic model and the dilatants model. Both these models depend upon coefficients that are not easy to obtain. Therefore, they are not very useful in practice. According to …
Organizational Alternatives To Achieve Greater Uniformity In State-Wide Water Rights Management In Utah, Daniel H. Hoggan, Kirk R. Kimball, Jay M. Bagley, Frank W. Haws
Organizational Alternatives To Achieve Greater Uniformity In State-Wide Water Rights Management In Utah, Daniel H. Hoggan, Kirk R. Kimball, Jay M. Bagley, Frank W. Haws
Reports
In the distribution of water among users in the state of Utah there is lack of organizational uniformity. On some rivers, the state engineer is assisted by river sommissioners who have been appointed to measure and monitor water deliveries. On other rivers there are no comissioners; problems and disputes must be settled on a case by case basis by the state engineer. The responsibilities, arrangements, salaries, and methods of payment for commissioners vary from basin to basin. A more unifed distribution organization composed of state-employed water sommissioners would have several advantages over the existing system of commissioners employed by local …
Further Studies Of A Cache Valley Residence Having A Groundwater Heat Pump, Michael L. Henrie
Further Studies Of A Cache Valley Residence Having A Groundwater Heat Pump, Michael L. Henrie
Reports
The thermal behavior of a 5-ton groundwater heat pump and the wood-frame house in which it is installed (located in Logan, Utah, latitude 44°49’; elevation 4775 ft.) were investigated during two 30 day peak use periods, the first in late summer and the second in mid-winter. Continuous measurements were taken of indoor and outdoor temperatures, groundwater temperatures, supply and return air temperatures, gallons of groundwater cycled, and Btu rejected or absorbed. These measurements were used for 1) determining the instantaneous heat gains and/or heat losses of the house by conduction and infiltration of both periods studied and 2) computing the …
Impacts Of Western Coal, Oil Shale, And Tar Sands Development On Aquatic Environmental Quality: A Technical Information Matrix; Volume 1 Introduction And Instructions, Jay J. Messer, Charles I. Liff, Kurt Gernerd, Frederick J. Post
Impacts Of Western Coal, Oil Shale, And Tar Sands Development On Aquatic Environmental Quality: A Technical Information Matrix; Volume 1 Introduction And Instructions, Jay J. Messer, Charles I. Liff, Kurt Gernerd, Frederick J. Post
Reports
Introduction: The Upper Colorado River Basin contains vast deposits of coal, oil shale, and tar sands, which could undergo extensive development should oil prices rise or an international situation restrict oil imports. Naturally, the prospect of development of these alternative fossil fuels resources has led to concern over how extraction and conversion activities will impact environmental quality. A thorough understanding of the nature and magnitude of the resulting envionemental impacts is a necessary prerequisite, if the costs and risks of such activites are to be weighed against the economic benefits. When we set out to evaluated these costs and risks, …
Salt Uptake In Natural Channels Traversing Mancos Shales In The Price River Basin, Utah, J. Paul Riley, D. George Chadwick, Lester S. Dixon, L. Douglas James, William J. Grenney, Eugene K. Israelsen
Salt Uptake In Natural Channels Traversing Mancos Shales In The Price River Basin, Utah, J. Paul Riley, D. George Chadwick, Lester S. Dixon, L. Douglas James, William J. Grenney, Eugene K. Israelsen
Reports
Field and laboratory measurements of process rates for runoff and salt movement were used to develop and calibrate a hydrosalinity model of outlfows from the Price River Basin at Woodside, Utah. The field measurements were specifically used to formulate a model for estimating surface flow (both overland and from small ephemeral channels) in the Coal Creek Basin on the valley floor of the Price River Basin. The basin simulation assessment model (BSAM) was used to combine local flows and model total outflow from the Price River. The results must be regarded as a first generation model that, while giving ostensibly …
Potential Of Water And Salt Yields From Surface Runoff On Public Lands In The Price River Basin, J. Paul Riley, Eugene K. Israelsen, William N. Mcneill, Brian Peckins
Potential Of Water And Salt Yields From Surface Runoff On Public Lands In The Price River Basin, J. Paul Riley, Eugene K. Israelsen, William N. Mcneill, Brian Peckins
Reports
The report examines possible sources of dissolved salts in the Price River basin. Ephemeral and intermittent streams contributed dissolved salts and are the focus of the study. Seven subwatersheds and the Price River at Heiner are investigated to examine the effects of existing watershed characteristics on runoff and dissolved salts production. Alternatley, the report examines the effects of specific land treatments on surface runoff quantity and quality. Various instrumentation techniques are evalauted to help improve future data collected capabilities in intermittent channels. The examination of the data reveals various trends that might be considered for further investigation in subsequent studies.
An Evaluation Of Water Conservation Techniques In The Upper Colorado River Basin, Rangesan Narayanan, Douglas R. Franklin
An Evaluation Of Water Conservation Techniques In The Upper Colorado River Basin, Rangesan Narayanan, Douglas R. Franklin
Reports
The Upper Colorado River Basin states contain large deposits of oil shale, tar sands, crude oil, coal, and natural gas, which are or could be used to produce refined petroleum products, natural and synthetic gas, and eletrical power. Agriculture is the predominant water consuming industry of the basin, accounting for 90 percent of the total depletions. Future energy development in the Upper Colorado River Basin will compete with agriculture for the limited supply of water by bidding up the price of water. The study attempts to identify the need for government-sponsored water conservation measures in conjunction with other water saving …
Development Of Contingency Plans And Scientific Background Studies For Applying Weather Modification During Drought Periods In Utah, David S. Bowles, Marjorie Frantz, Terry Glover, E. Arlo Richardson, Joe L. Sutherland
Development Of Contingency Plans And Scientific Background Studies For Applying Weather Modification During Drought Periods In Utah, David S. Bowles, Marjorie Frantz, Terry Glover, E. Arlo Richardson, Joe L. Sutherland
Reports
A multi-disciplinary study of drought in utah was conducted as a part of the Bureau of Reclamation's Southwest Drought Research Program. The study was administered by the Utah Division of Water Resources. Utah drought was investigated from a variety of viewpoints, including drought climatology, drought meteorology, hydrologic effects of drought, and economic effects of drought. A stand-by wintertime cloud seeding program was designed for all sections of the state. An economics model was then used to determine benfits to the state as a result of the seeding program.
Hydrologic Series Generation From The Spectral Density Function, Ronand V. Canfield
Hydrologic Series Generation From The Spectral Density Function, Ronand V. Canfield
Reports
Computer simulation of hydrologic processes has become an effective analytical tool for analysis of complicated water resource systems. Present methods of generating sequences place practical limits on the ability of the methods to preserve an observed autocorrelation structure. This report explores the use of spectral characteristics in the generation of time series. Because of the correspondence between the spectral density function and the autocorrelation function of a time series, the spectrum can be used to fit any of the empirical autocorrelation structures observed in hydrologic sequences. The problem of maintaining an observed correlation structure in a generated sequence is reduced …
A Multivariate Water Quality Index For Use In Management Of A Wildland Watershed, Ramzi Mahmood, Jay J. Messer, Frank J. Nemanich, Charles I. Liff, Dennis B. George
A Multivariate Water Quality Index For Use In Management Of A Wildland Watershed, Ramzi Mahmood, Jay J. Messer, Frank J. Nemanich, Charles I. Liff, Dennis B. George
Reports
Executive Summary: Summary: Multivariate statistical techniques were used to define a method for establishing a water quality index (WQI) for use in protecting the stream environment in a high mountain watershed. The purpose of the WQI was to aggregate water quality parameters in such a way that the effects of low level increments in mining, grazing, logging and other activities could be related to a change in the value of a single entity, aquatic environmental aquality, in a linear programming (LP) management model. Several data aggregation methods were explored, using water quality data collected over 5 years (1975-1979) by the …
Salt Loading From Efflorescence And Suspended Sediments In The Price River Basin, David S. Bowles, Hooshang Nezafati, Rao K. Bhasker, J. Paul Riley, R. J. Wagenet
Salt Loading From Efflorescence And Suspended Sediments In The Price River Basin, David S. Bowles, Hooshang Nezafati, Rao K. Bhasker, J. Paul Riley, R. J. Wagenet
Reports
Salinity control is a major component of water management in arid climates and irrigated areas and one of particular concern in the Colorado River Basin. The alts enter the water as it flows over land or moves through the soil or geologic formations. The principal salt collection processes are 1) dissolution from the soil surface during runoff events, 2) transpiration of soil water leaving salt residuals, 3) efflorescence left by evaporating seepage and then dissolved by subsequent runoff, 4) dissolution with weathering of fixed bed channels, 5) salts released by sediments entering the channel from sheet, gulley, and bank erosion, …
Reverse Osmosis In The Treatment Of Drinking Water, R. Ryan Dupont, Talbert N. Eisenberg, E. Joe Middlebrooks
Reverse Osmosis In The Treatment Of Drinking Water, R. Ryan Dupont, Talbert N. Eisenberg, E. Joe Middlebrooks
Reports
An extensive review of the literature was conducted and results were evaluated for the use of the reverse osmosis process in the treatment of drinking water supplies. All aspects of reverse osmosis technology, including pretreatment requirements; membrane type and configuration; membrane cleaning and maintenance; and reverse osmosis removal of organics, inorganics, and microbial contaminants were incorporated inot the literature evaluation. A survey (Appendix E) of existing full scale reverse osmosis installations was also carried out and results of the survey are discussed. In light of data presented in the literature and results of the survey conducted, the following recommendations were …
Lake Powell Water Quality Programs And Associated Files, A Users' Guide To Programs Powell And Powplot, United States Department Of The Interior, Bureau Of Reclamation
Lake Powell Water Quality Programs And Associated Files, A Users' Guide To Programs Powell And Powplot, United States Department Of The Interior, Bureau Of Reclamation
Water
During the summer of 1980, work began at the Engineering and Research Center, Bureau of Reclamation, to develop a computerized method for analyzing Lake Powell water quality data. Lake Powell, in southeastern Utah is formed by Glen Canyon Dam on the Colorado River at Page, Arizona. This work was carried out by Mr. Greg A. Keller under the supervision of Mr. David H. Merritt in the Colorado River Water Quality Office. By July of 1981, two computer programs, named POWELL and POWPLOT, had been produced. This document is intended to provide guidance for the user of these programs.
Ellis-Pahsimeroi, Final Grazing Environmental Impact Statement, United States Department Of Interior, Bureau Of Land Management, Idaho
Ellis-Pahsimeroi, Final Grazing Environmental Impact Statement, United States Department Of Interior, Bureau Of Land Management, Idaho
Range Management Plans (ID)
The Ellis-Pahsimeroi Grazing Environmental Impact Statement analyzes the effects of livestock grazing on 380,458 acres of public land in central Idaho. Six grazing management alternatives are presented for consideration and are analyzed in terms of their projected economic, social and environmental effects. Each alternative analyzes a different level of allocating the vegetative resource among competing uses.
This document will be used to determine the proper level of livestock grazing on the public lands, using the multiple use sustained-yield concept. Its contents exemplify the conflicting demands being placed on public lands throughout the West and the concessions necessary to achieve parity …
Ellis-Pahsimeroi Final Grazing Environmental Impact Statement, United States Department Of The Interior Bureau Of Land Management
Ellis-Pahsimeroi Final Grazing Environmental Impact Statement, United States Department Of The Interior Bureau Of Land Management
Final Environmental Impact Statements (ID)
This document will be used to determine the proper level of livestock grazing on the public lands, using the multiple use sustained-yield concept. Its contents exemplify the conflicting demands being placed on pubic lands throughout the West and the concessions necessary to achieve parity between resource needs and resource use. The range land management program selected for the Ellis-Pahsimeroi area will be based upon the analysis presented in this document.
Bruneau-Kuna Grazing Environmental Impact Statement Final, United States Department Of The Interior Bureau Of Land Management
Bruneau-Kuna Grazing Environmental Impact Statement Final, United States Department Of The Interior Bureau Of Land Management
Final Environmental Impact Statements (ID)
The Bruneau-Kuna Grazing Environmental Impact Statement analyzes the effects of livestock grazing on 2,379,014 acres of public land in southwest Idaho. Four grazing management alternatives to the Proposed Action are presented and analyzed in terms of their projected economic, social and environmental effects. Each alternative analyzes a different level of allocating the vegetative resource among competing users. This document will be used to determine the proper level of forage allocation to livestock and wildlife use on the public lands, using the multiple use sustained-yield concept. The rangeland management program selected for the subject public land will be based upon the …
Land Use Inventory Of Salt Lake County, Utah From Color Infrared Aerial Photography 1982, Kevin P. Price, Reynold D. Willie, Douglas J. Wheeler, Merrill K. Ridd
Land Use Inventory Of Salt Lake County, Utah From Color Infrared Aerial Photography 1982, Kevin P. Price, Reynold D. Willie, Douglas J. Wheeler, Merrill K. Ridd
All U.S. Government Documents (Utah Regional Depository)
Salt lake County, Utah's major population center, continues to experience rapid urban growth. The Impacts of urbanization on land use patterns and natural resources in the county are of particular Interest to both state and local policy makers and planners. The effect of urban development on a dwindling agricultural land base and water resources must be assessed to allow a rational basis for future water allocation and land use planning .
Flood Insurance Study, Federal Emergency Management Agency
Flood Insurance Study, Federal Emergency Management Agency
All U.S. Government Documents (Utah Regional Depository)
This Flood Insurance Study investigates the existence and severity of flood hazards in the City of Logan, Cache County, Utah, and aids in the administration of the National Flood Insurance Act of 1968 and the Flood Disaster Protection Act of 1973. This study will be used to convert Logan to the regular program of flood insurance by the Federal Emergency Management Agency (FEMA). Local and regional planners will use this study in their efforts to promote sound flood plain management.
Paradox Area Characterization Summary And Location Recommendation Report, United States Department Of Energy
Paradox Area Characterization Summary And Location Recommendation Report, United States Department Of Energy
All U.S. Government Documents (Utah Regional Depository)
Through its National Waste Terminal Storage (NWTS) Program, the Department of Energy (DOE) is responsible for providing facilities to permanently dispose of high-level nuclear waste (HLW) in a manner that will ensure public health and safety and that will be environmentally acceptable. The program has placed principal emphasis on developing deep, underground repositories, with efforts targeted toward having the first facility operational between 1999 and 2006. To reach this objective, an extensive program has been developed to find sites that would be suitable for a repository. A draft National Plan for Siting High-Level Radioactive Waste Repositories, recently published by DOE …
Paradox Basin Site Characterization Report Preparation Papers Gibson Dome Location, United States Department Of Energy
Paradox Basin Site Characterization Report Preparation Papers Gibson Dome Location, United States Department Of Energy
All U.S. Government Documents (Utah Regional Depository)
This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, not any of their employees, make any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the …