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Articles 48691 - 48720 of 52448

Full-Text Articles in Physical Sciences and Mathematics

A Laboratory Evaluation Of Leachate From The Jim Bridger Power Plant Scrubber Wastes, V. Dean Adams, Mary E. Pitts, Megan J. Dyer Jan 1981

A Laboratory Evaluation Of Leachate From The Jim Bridger Power Plant Scrubber Wastes, V. Dean Adams, Mary E. Pitts, Megan J. Dyer

Reports

Introduction: Scrubber wastes obtained in an affort to limit air pollution generated by coal-fired pwoer plants may contribute to another possible sources of pollution. To date, scrubber wastse have been in a liquid phase which causes disposal problems partially due to the liquid characteristics. The use of solid scrubber wastes and the land deposition of such wastes is proposed. The feasibility of solid scrubber wastes disposal in landfills is under question. The primary area of concern is the effect that water percolation through such wastes would have on groundwater quality parameters. Contamination could result either as precipitation travels downward through …


Lime Neutralization Of So2 Treated Wastewater After Air Stripping, V. Dean Adams Jan 1981

Lime Neutralization Of So2 Treated Wastewater After Air Stripping, V. Dean Adams

Reports

No abstract provided.


Ph Neutralization And Phosphorus Removal From A Sulfur Dioxide (So2) Treated Wastewater Using Lime (Ca(Oh)2) Addition, V. Dean Adams, Richard J. Watts Jan 1981

Ph Neutralization And Phosphorus Removal From A Sulfur Dioxide (So2) Treated Wastewater Using Lime (Ca(Oh)2) Addition, V. Dean Adams, Richard J. Watts

Reports

No abstract provided.


Sulfur Dioxide Treatment Of Secondary Sewage: Effect On Viruses, V. Dean Adams Jan 1981

Sulfur Dioxide Treatment Of Secondary Sewage: Effect On Viruses, V. Dean Adams

Reports

No abstract provided.


Relationship Between The Chesapeake Bay Blue Crab And Its Climatological Environment : Oceanographic And Atmospheric Data, Robert E. Harris Jr., Willard A. Van Engel Jan 1981

Relationship Between The Chesapeake Bay Blue Crab And Its Climatological Environment : Oceanographic And Atmospheric Data, Robert E. Harris Jr., Willard A. Van Engel

Reports

Monthly and annual means of 38 oceanographic and atmospheric variables, for the calendar years 1958 through 1975, are presented in tables.


The Quality Outdoor Recreation Component In Multi-Purpose Conservation Areas: A User Assessment Devised, And Applied To Pinehurst Lake Conservation Area, Gerald Carl Thomas Jan 1981

The Quality Outdoor Recreation Component In Multi-Purpose Conservation Areas: A User Assessment Devised, And Applied To Pinehurst Lake Conservation Area, Gerald Carl Thomas

Theses and Dissertations (Comprehensive)

Recreational demand for out-of-doors space and facilities continues to increase into the 1980’s. Accordingly, multi-purpose conservation areas, by the nature of their designations, require ongoing assessment of the attributes which determine the quality of the recreational experience they afford.

A problem with the master planning process for these multi-use areas is that in the past, little or no consideration has been given to user-recreationist input in the development stages of the master plans. The purpose of this study is to devise a method of assessing user satisfaction towards the recreational quality available at multi-use conservation areas, and to show how …


Oyster Spatfall In Virginia Rivers: 1980 Annual Summary, Dexter S. Haven, Paul C. Kendall Jan 1981

Oyster Spatfall In Virginia Rivers: 1980 Annual Summary, Dexter S. Haven, Paul C. Kendall

Reports

The Virginia Institute of Marine Science (VIMS) conducts weekly surveys from June through early October to obtain oyster spatfall information. Spat counts are made from oyster shells strung on wire and suspended from stakes on public and private beds. The number of spat on shells are counted each week of the spawning season to determine the potential of a particular area for receiving a strike and to predict the most likely period the strikes will occur. Shells planted just before the period of maximum set have the best chance of getting a good strike.


Calcium Carbonate Precipitation As Influenced By Stream Primary Production, Gretchen L. Rupp, V. Dean Adams Jan 1981

Calcium Carbonate Precipitation As Influenced By Stream Primary Production, Gretchen L. Rupp, V. Dean Adams

Reports

The potential influence of periphyton photosynthesis on calcium carbonate precipitation was studied for the Logan River, Bear River Mountains, northern Utah. The water chemistry, hydrology, and benthic primary production of the river were monitored for one year. periphyton photosynthesis and calcium carbonate precipitation were measured concurrently in laboratory experiments utilizing radioisotopic tracers. These experiments investigated the effects of water temperature, velocity, and macronutrient concentration on photosynthetically induced calcium carbonate precipitation. In these experiments, the biologic induction of calcium carbonate precipitation was not correlated with water nutrient level. It did, however, reflect water temperature, and was greatest at approximately 10 degrees …


The Occurrence Of Trihalomethane Compounds In Salt Lake City And Ogden, Utah, Drinking Water Supplies, Thomas Peters, V. Dean Adams, Dennis B. George Jan 1981

The Occurrence Of Trihalomethane Compounds In Salt Lake City And Ogden, Utah, Drinking Water Supplies, Thomas Peters, V. Dean Adams, Dennis B. George

Reports

A purge and trap, gas chromatography system was developed to analyze for trihalomethane (THMs) compounds at the ppb (parts per billion) level in drinking water. Monthly influent and effluent samples were taken from three Weber Basin Water Conservancy Distrcit treatment plants, three Salt Lake City water treatmetn platns, and one Slat Lake Metropolitan water treatment plant. In addition tap water samples were taken at various business and residential locations in Salt Lake City, Utah, and Ogen, Utah. All samples were analyzed for trihalomethanes and total organic carbon (TOC). In addition to monthly sampling, a comparison of the production of THMs …


The Kinetics Of Rotating Biological Contactors Treating Domestic Wastewater, Abraham Pano, E. Joe Middlebrooks, J. H. Reynolds Jan 1981

The Kinetics Of Rotating Biological Contactors Treating Domestic Wastewater, Abraham Pano, E. Joe Middlebrooks, J. H. Reynolds

Reports

Four, four-stage, laboratory scale rotating biological contactor (RBC) units were employed to develop kinetic models for the RBC process when treating domestic wastewater. The study was conducted at three different temperatures of 5 degrees C, 15 degrees C, and 20 degrees C. Each unit operated at a different constant organic loading rate taht ranged from 4 qCOD/m^2/d to 14 gCOD/m^2/d and at a constand detention time of 2 hours. Carbonaceous substrate removals measured as COD cencentrations with the four-stage RBC's were 80, 85, and 90 percent for 5 degrees C, 15 degrees C, and 20 degrees C, respectively. The major …


Natural Salinity Removal Processes In Reservoirs, Jay J. Messer, Eugene K. Israelsen, V. Dean Adams Jan 1981

Natural Salinity Removal Processes In Reservoirs, Jay J. Messer, Eugene K. Israelsen, V. Dean Adams

Reports

A small but significant amount of salinity removal has been reported by various authors to occur in mainstem Colorado River reservoirs. Recalculation of some of these salinity budgets, together with a review of the data bases used, usggests taht removal has not often been conclusively demonstrated. Laboratory microcosm experiments and field data indicate that calcium carbonate precipitation, perhaps with some coprecipitation of magnesium carbonate, is the mechanism responsible for most of the salinity removal in Oneida Reservoir, Idaho. Coprecipitation processes (including ion exchange), coagulation, and bioassimilation do not appear to be important natural salinity removal mechanisms. Finally, loss of calcium, …


A Methodology For Public-Planner Interaction In Multiobjective Project Planning And Evaluation, Mac Mckee, T. Ward Morgan, Rangesan Narayanan, A. Bruce Bishop Jan 1981

A Methodology For Public-Planner Interaction In Multiobjective Project Planning And Evaluation, Mac Mckee, T. Ward Morgan, Rangesan Narayanan, A. Bruce Bishop

Reports

A review of current multiple objective planning techniques is presented. A critique of certain classes of these techniques is offered, especially in terms of the degree to which they facilitate certain information needs of the planning process. Various tools in operations research are used to constructed a new multiple objective planning methodology, called the "Vector Optimization Decision Convergence Algorithm" (VODCA). An application of the methodology pertaining to water resources development in Utah is documented.


A User's Manual For Computer Programs Used In: Model Choice: An Operational Comparison Of Stochastic Streamflow Models For Droughts, W. Robert James, David S. Bowles, Nath T. Kottegoda Jan 1981

A User's Manual For Computer Programs Used In: Model Choice: An Operational Comparison Of Stochastic Streamflow Models For Droughts, W. Robert James, David S. Bowles, Nath T. Kottegoda

Reports

The rapid development of stochastic or operational hydrology over the past 10 years has led to the need for some comparative analyses of the currently available long-term persistence models. Five annual stochastic streamflow generation models (autoregressive, autoregressive-moviing-average (ARMA), ARMA-Markov, fast fractional Gaussian noise, and broken line) are compared on their ability to preserved drought-related time series properties and annual statistics. Using Monto Carlo generation procedures and comparing the average generated statistics and drought or water supply properties, a basis is established to evaluated model performance on four different Utah study streams. A seasonal disaggregation model is applied to each of …


Model Choice: An Operational Comparison Of Stochastic Streamflow Models For Droughts, W. Robert James, David S. Bowles, Nath T. Kottegoda Jan 1981

Model Choice: An Operational Comparison Of Stochastic Streamflow Models For Droughts, W. Robert James, David S. Bowles, Nath T. Kottegoda

Reports

The rapid development of stochastic or operational hydrology over the past 10 years has led to the need for some comparative analyses of the currently available long-term persistence models. Five annual stochastic streamflow generation models (autoregressive, autoregressive-moving-average (ARMA), ARMA-Markov, fast fractional Gaussian noise, and broken line) are compared on their ability to preserve drought-related time series properties and annual statistics. Using Monte Carlo generation procedures and comparing the average generated statistics and drought or water supply properties, a basis is established to evalute model performance on four different Utah study streams. A seasonal disaggregation model is applied to each of …


Update On Estimation Of Water Surface Elevation Probabilities For The Great Salt Lake, L. Douglas James, David S. Bowles, W. Robert James, Ronald V. Canfield Jan 1981

Update On Estimation Of Water Surface Elevation Probabilities For The Great Salt Lake, L. Douglas James, David S. Bowles, W. Robert James, Ronald V. Canfield

Reports

The techniques of operational hydrology, employing an autoregrssive moving average (ARMA (1,0) model were used to replicate historical patterns of streamflow into, precipitation on, and evaporation from the Great Salt Lake. The results were combined with a lake water balance model to simulate lake stage sequences beginning with known initial conditions and extending up to 125 years into the future and used to generate probability distributions for future lake stages. Starting with a spring 1980 high stage of 4200.45 ft msl, the best estimate is that the 1981 spring high will be 4200.19, but there is one change in four …


Hydrosalinity Impacts Of Conservation Measures In The Sevier River Basin, Eugene K. Israelsen Jan 1981

Hydrosalinity Impacts Of Conservation Measures In The Sevier River Basin, Eugene K. Israelsen

Reports

The Sevier River Basin is a water short basin wherein upstream diversions not consumptively used become the water right for downstream users. The diversion-return cycle occurs several times as the stream travels from its mountain source areas to the terminal lake at the lower end of the basin. This study dealt with the proposed implementation of conservation measures which would wawste less diverted water and allow for irrigation of additional acres. The objective was to predict the hydrosalinity impacts of the implementation of these measures. The results indicated that increased consumptive use in the upper areas would decrease the water …


Erosion Inhibitor Performance Evaluation Under Simulated Wind And Rain, C. Earl Israelsen, Eugene K. Israelsen, William N. Mcneill Jan 1981

Erosion Inhibitor Performance Evaluation Under Simulated Wind And Rain, C. Earl Israelsen, Eugene K. Israelsen, William N. Mcneill

Reports

Introduction: Increasing public awareness of the desireability of protecting the environment from soil erosion caused by wind and water has centered attention on large construction projects such as highways and housing subdivisions, as well as on individual building sites and parking lots. If unattended, sediment produced from these areas pollutes surface water, restricts drainage, fills reservoirs, damages adjacent land, and upsets the natural ecology of lakes and streams. The search continues for products and practices that will prevent of lessen the amount of sediment leaving construction sites. Products currently in use include chemical as well as organic materials, and they …


Evaluation Of Particular Mulches For Fostering Plant Growth And Inhibiting Erosion (Phase 2), C. Earl Israelsen, Eugene K. Israelsen, William N. Mcneill Jan 1981

Evaluation Of Particular Mulches For Fostering Plant Growth And Inhibiting Erosion (Phase 2), C. Earl Israelsen, Eugene K. Israelsen, William N. Mcneill

Reports

Introduction: Increasing public awareness of the desireability of protecting the environment from soil erosion caused by wnid and water has centered attention on large construction projects such as highways and housing subdivisions, as well as on individual building sites and parking lots. If unattended, sediment produced from these areas pollutes surface water, restricts drainage, fills reservoirs, damages adjacent land, and upsets the natural ecology of lakes and streams. The search continues for products and practices that will prevent or lessen the amount of sediment leaving construction sites. Products currently in use include chamical as well as organic materials, and they …


Economic Impacts Of Irrigation Technologies In The Sevier River Basin, Theodore R. Frickel, Rangesan Narayanan Jan 1981

Economic Impacts Of Irrigation Technologies In The Sevier River Basin, Theodore R. Frickel, Rangesan Narayanan

Reports

The economic well-being of the semiarid intermountain area requires efficent use of available water supplies. Agriculture, the major water-consuming industry, depends on irrigation water. The adoption of sprinkler systems that increase on-farm irrigation "efficiencies" and the area which can be irrigated from upstream diversions may interfere with the "tenure" of downstream water rights. These downstream effects need to be evaluated before allowing farmers to use the water "saved" to irrigate additional acreages or crops to obtain greater profits. The problem in letting farms expand their irrigated acreage is that the individual farmer increases his profits through increased consumptive use. The …


A Survey And Evaluation Of Shallow Groundwater Contamination Hazards In The State Of Utah, Edward P. Fisk, Calvin G. Clyde Jan 1981

A Survey And Evaluation Of Shallow Groundwater Contamination Hazards In The State Of Utah, Edward P. Fisk, Calvin G. Clyde

Reports

A survey was made to appraise current man-made contamination of shallow groundwater in Utah. Very little has been published on the subject, and most of the information was obtained by personal observation and through interviews of individuals concerned with water quality protection in Utah. After presenting the relevant physiographic, geologic, and hydrologic characteristics of the various regions of Utah and discussing how these relate to groundwater contamination in general, representative groundwater quality hazards in 32 sites or regions in Utah are presented. A very wide range of hazards to groundwater quality was found to exist. These cases cover the range …


The Distribution And Relative Abundance Of Aquatic Oligochaeta In The Upper Cache River System, Southern Illinois, In Relation To Water Quality, Mark Julian Wetzel Jan 1981

The Distribution And Relative Abundance Of Aquatic Oligochaeta In The Upper Cache River System, Southern Illinois, In Relation To Water Quality, Mark Julian Wetzel

Masters Theses

Species composition, distribution, abundance, and water quality relationships of aquatic oligochaetes occurring in the upper Cache River system, southern Illinois were investigated. Forty-two taxa of oligochaetes including 16 naidids, 22 tubificids and representatives of the families Aeolosomatidae, Branchiobdellidae, Enchytraeidae, and Lumbriculidae were collected. Four species of oligochaetes new to Illinois, Limnodrilus psammophilus Loden, L. rubripenis Loden, Psammoryctides (Spencerius) californianus Brinkhurst, and Haemonais waldvogeli Bretscher were collected during this study. Another species of Limnodrilus new to science is reported here, as yet undescribed. The thesis that aquatic oligochaetes can be used as true water quality indicator organisms is rejected. It is …


Influence Of Marinas On Hydrocarbons In Sediments Of Two Estuarine Creeks, Evangelos Alexandros Voudrias Jan 1981

Influence Of Marinas On Hydrocarbons In Sediments Of Two Estuarine Creeks, Evangelos Alexandros Voudrias

Dissertations, Theses, and Masters Projects

No abstract provided.


The Status Of Marine Turtles In Chesapeake Bay And Virginia Coastal Waters, Maryellen Lutcavage Jan 1981

The Status Of Marine Turtles In Chesapeake Bay And Virginia Coastal Waters, Maryellen Lutcavage

Dissertations, Theses, and Masters Projects

No abstract provided.


Recolonization Of Meiobenthos In Oiled Azoic Subtidal Muddy Sands Of The York River Estuary, Virginia, Daniel M. Alongi Jan 1981

Recolonization Of Meiobenthos In Oiled Azoic Subtidal Muddy Sands Of The York River Estuary, Virginia, Daniel M. Alongi

Dissertations, Theses, and Masters Projects

No abstract provided.


Volume 4, Number 12 (December 1980), The Solar Ocean Energy Liaison Dec 1980

Volume 4, Number 12 (December 1980), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Monthly Planet, 1980, December, Mark Gardner, Huxley College Of The Environment, Western Washington University Dec 1980

Monthly Planet, 1980, December, Mark Gardner, Huxley College Of The Environment, Western Washington University

The Planet

No abstract provided.


Methods For Biological, Chemical, And Physical Analyses In Reservoirs, Penelope E. Kellar, Sherell A. Paulson, Larry J. Paulson Dec 1980

Methods For Biological, Chemical, And Physical Analyses In Reservoirs, Penelope E. Kellar, Sherell A. Paulson, Larry J. Paulson

Publications (WR)

This manual contains detailed descriptions of biological, chemical and physical sampling and analytical procedures used at the Lake Mead Limnological Research Center. The manual was prepared in response to requests made by numerous individuals involved in the Las Vegas Valley Water Quality Program. This manual represents what we consider to be a reasonably complete compilation of methods useful in studying both general and specific limnological questions. While each section is sufficiently detailed to be of use to investigators with little experience in limnological methodology, the methods can be used on a wide variety of lakes and reservoirs, with relatively little …


Volume 4, Number 11 (November 1980), The Solar Ocean Energy Liaison Nov 1980

Volume 4, Number 11 (November 1980), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Water Current, Volume 12, No. 6, November/December 1980 Nov 1980

Water Current, Volume 12, No. 6, November/December 1980

Water Current Newsletter

Proposal Deadline for OWRT Annual Cooperative Program
New Staff Addition
Legislative Record Available
General Guidelines Available
Water Resource Seminar Series
MRBC Launches Missouri River Flood Plain Study
Interim Study on Irrigated Western Farmlands Indicates Most Are Small Operations
Federal Water Resources Research Priorities
Research Review: Remotely Sensed Crop Temperatures for Water Resources Management


Tb101: The Relevance Of Option Value In Benefit-Cost Analysis, Stephen D. Reiling, Mark W. Anderson Nov 1980

Tb101: The Relevance Of Option Value In Benefit-Cost Analysis, Stephen D. Reiling, Mark W. Anderson

Technical Bulletins

This publication represents a review and a critical re-evaluation of the literature dealing with option value. This literature is rich and dynamic and provides a fascinating sequence of articles, comments, and rebuttals. Reevaluation of the concept requires a rather comprehensive review of this literature, which is something that has not been provided to date. The literature review is also important because the work of some authors has been systematically overlooked in the course of the debate. As a result of this oversight, the original formulation of the concept continues to be cited in the literature even though its practical significance …