Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics Commons

Open Access. Powered by Scholars. Published by Universities.®

Environmental Sciences

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 47581 - 47610 of 52435

Full-Text Articles in Physical Sciences and Mathematics

Impact Of Petroleum Exploration Activity On Range Resources And Pastoral Pursuits In The West Kimberley, N Klepacki, S J. Black, M H. Marchant Jan 1985

Impact Of Petroleum Exploration Activity On Range Resources And Pastoral Pursuits In The West Kimberley, N Klepacki, S J. Black, M H. Marchant

Resource management technical reports

No abstract provided.


The Taarblin Experience : A Planned Approach To Soil Conservation, Greg Astbury, Owner/Manager Of Taarblin, Tim Negus Jan 1985

The Taarblin Experience : A Planned Approach To Soil Conservation, Greg Astbury, Owner/Manager Of Taarblin, Tim Negus

Bulletins 4000 -

Many farms in Western Australia were cleared and developed before there was a full and clear understanding of the effects of bush clearing - that is salinization of soil and water supplies, wind and water erosion, waterlogging and soil structure decline. The productive capacity and inherent problems of the different soil types was also largely unknown.

Modern-day Conservation Farm Planning aims to provide a blue-print for the redevelopment of properties to ensure long term soil fertility, to prevent soil erosion and degradation by waterlogging and salinity. It also provides for a spread of reliable stock watering points and more efficient …


Water Well Pump Efficiency Monitor Units, Calvin G. Clyde, Duard S. Woffinden, Graeme Duncan Jan 1985

Water Well Pump Efficiency Monitor Units, Calvin G. Clyde, Duard S. Woffinden, Graeme Duncan

Reports

Indroduction: As the costs for pumping municipal, industrial and irrigation water rise, owners and the public area giving increased attention to energy conservation. One way to conserve energy is to operate water pumps at or near peak efficiency. The measurement of pump efficiency usually requires a special test equipment, a skilled operator and time to perform the test. Owners may find it more economical to waste power than to monitor for inefficiencies. One way to help change this situation is to develop inexpensive equipment for unskilled people to use to obtain rapid measurements of pump efficiency under typical operating conditions. …


Methodology Report: Updating The Estimation Of Water Surface Elevation Probabilities And Associated Damages For Great Salt Lake , David S. Bowles, L. Douglas James, D. George Chadwick, Ronald V. Canfield, Norman Stauffer Jan 1985

Methodology Report: Updating The Estimation Of Water Surface Elevation Probabilities And Associated Damages For Great Salt Lake , David S. Bowles, L. Douglas James, D. George Chadwick, Ronald V. Canfield, Norman Stauffer

Reports

No abstract provided.


Delineation Of Landslide, Flash Flood, And Debris Flow Hazards In Utah, David S. Bowles Jan 1985

Delineation Of Landslide, Flash Flood, And Debris Flow Hazards In Utah, David S. Bowles

Reports

During 1982, 1983, and 1984, abnormally wet conditions in Utah triggered flash floods, landslides, and debris flows. Pore pressures built in hillside soils below melting snows and during prolonged periods of rainfall until the mass suddenly gave way, sometimes as a landslide and other times as a non-Newtonian debris flow that moved rapidly long distances down mountain slopes until finally stiffened by moisture loss or velocity loss because of flatter gradients. Also, runoff from heavy rainfall bursts picked up weathered and other loose material that accumulated on land surfaces over long dry periods . The sediment laden waters flowed out …


Problems Of Small Privately Operated Water Companies In Utah, Jay M. Bagley, Frank W. Haws Jan 1985

Problems Of Small Privately Operated Water Companies In Utah, Jay M. Bagley, Frank W. Haws

Reports

Although one in seven domestic water supply systems in Utah are privately owned and operated, they are characteristically small with 94 percent serving populations of less than 1,000. Per capita costs of service vary greatly but become relatively high for locations that are remote, where terrain and climate are extreme, where scale economies are absent, and where materials and skills for system repair and replacement are not locally available. Statistics indicate that the incidence of water quality violations relate strongly to system size. Yet corrections are often more difficult to achieve because well trained and full time operators cannot be …


A Methodology For Estimating Instream Flow Values For Recreation, Parvaneh Amirfathi, Rangesan Narayanan, A. Bruce Bishop, Dean Larson Jan 1985

A Methodology For Estimating Instream Flow Values For Recreation, Parvaneh Amirfathi, Rangesan Narayanan, A. Bruce Bishop, Dean Larson

Reports

Water flowing in streams has value for various types of recreationists and is essential for fish and wildlife. Since water demdns for offstream uses in the arid west have been steadily increasing, increasing instream flows to enhance the recreational experience might be in conflict with established withdrawals for uses such as agriculture, industries, and households. Since market prices are not observable for instream flows, the estimation of economic value of instream flow would present well known difficulties. The household production function theory was used to build the theoretical model to measure economic value of instream flow. A representative sample of …


Optimal Configuration Of Regional Water Supply Systems (Wasopt2) , Mohamed L. Al-Eryani, Trevor C. Hughes Jan 1985

Optimal Configuration Of Regional Water Supply Systems (Wasopt2) , Mohamed L. Al-Eryani, Trevor C. Hughes

Reports

Any water supply system can be conceptualized as consisting of three componenets--source development facilities (including treatment), transmission facilities, and a distribution network. The scope of this report is limited to the first two--the source related facilities upstream from the distribution network. In the mathematical modeling of regional rural systems, the number of variables, and hence the size of the model, increases rapidly as the number of system componenets and their alternative designs increase. Regardless of the method of solution, manual preparation of large models is cumbersome and is vulnerable to human error both in the computations of the matrix coefficients …


Promoting Economic Incentives For Environmental Protection In The Surface Mining Control And Reclamation Act Of 1977: An Analysis Of The Design And Implementation Of Reclamation Performance Bonds, Barbara Webber, David Webber Jan 1985

Promoting Economic Incentives For Environmental Protection In The Surface Mining Control And Reclamation Act Of 1977: An Analysis Of The Design And Implementation Of Reclamation Performance Bonds, Barbara Webber, David Webber

Faculty & Staff Scholarship

No abstract provided.


Monthly Reports On The State Of Rivers 1985, Albert Kuo Jan 1985

Monthly Reports On The State Of Rivers 1985, Albert Kuo

Reports

Chiefly graphs showing monthly salinity, temperature, dissolved oxygen distributions at slackwater for the James, York, Pamunkey, and Rappahannock Rivers.

1985: April-July; September - November


Ua37/30/2 Wku Research Notecards - E Topics, Lowell Harrison Jan 1985

Ua37/30/2 Wku Research Notecards - E Topics, Lowell Harrison

Faculty/Staff Personal Papers

Notecards created by Lowell Harrison while researching his book Western Kentucky University. The cards transcribed below are for 104 topics beginning with E ranging from Eagle Prep to Extension.


Oyster Spatfall In Virginia Rivers: 1984 Annual Summary, James Whitcomb Jan 1985

Oyster Spatfall In Virginia Rivers: 1984 Annual Summary, James Whitcomb

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 on oyster shells strung on wire and suspended from stakes on public and private beds. The number of spat on shells is 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.


A Study Of Trihalomethane Precursors In Deer Creek Reservoir, Megan J. White, V. Dean Adams Jan 1985

A Study Of Trihalomethane Precursors In Deer Creek Reservoir, Megan J. White, V. Dean Adams

Reports

Deer Creek Reservoir and tributaries were monitored from May to December 1983 in a study of the occurrence of trihalomethane (THM) precursors in the reservoir and nutrient dynamics of the reservoir system. Microcosms were used to study the effect of the following parameters on THM precursor production in the reservoir system: phosphorus loading, sediment, algal growth, and application of algicide. Additionally, THM precursor concentrations of interstitial water were analyzed in reservoir and microcosm sediment samples. Microcosms treated with ahigh phosphorus loading (70 ug/1) had THM precursor concentrations significantly higher than those measured in microcosms treated with a low phosphorus loading …


Development Of Design Criteria For Sensitizer Photooxidation Treatment Systems, Richard J. Watts, V. Dean Adams, E. Joe Middlebrooks Jan 1985

Development Of Design Criteria For Sensitizer Photooxidation Treatment Systems, Richard J. Watts, V. Dean Adams, E. Joe Middlebrooks

Reports

Sensitized photooxidation is a physicochemical process that can degrade many toxic and refractory organic pollutants. A trace quantity of sensitizer added to the waste absorbs visible light; electronically excited intermediates then transfer the energy to decompose the waste. Engeineering design criteria were developed for industrial waste treatment lagoons that would use sensitized photooxidation. Design criteria were developed regarding optimum lagoon pH, optimum sensitizer concentration, depth and sizing of lagoons, dissolved oxygen requirements, and effect of temperature on photooxidation rate. Treatment of the refractory pesticides bromacil, terbacil, and fluometuron was investigated using methylene blue and riboflavin as sensitizers. Methylene blue-sensitized photooxidation …


Assessment Of Control Alternatives For The Great Salt Lake, L. Douglas James, David S. Bowles Jan 1985

Assessment Of Control Alternatives For The Great Salt Lake, L. Douglas James, David S. Bowles

Reports

Introduction: Over the last few years, the rising level of the Great Salt Lake has changed Utah. It has inundated vast waterfowl feeding areas, crippled the salt industry, required raising transcontinental freeways and railroads, threatened metropolitan waste treatment plants, caused a major electrical outage, and damaged many properties. If nothing is done, approximately $3.6 billion of damages in 1985 dollars can be expected by 2050 (James et al, 1985, p.4). This threat led the State Legislature to set aside $100 million (an amount approximating the damages that had then occurred) in January 1985 to identify, select, and implement remedial measures. …


Preliminary Identification, Analysis, And Classification Of Odor-Causing Mechanisms Influenced By Decreasing Salinity Of The Great Salt Lake, C. Earl Israelsen, Darwin L. Sorensen, Alberta J. Seierstad, Charlotte Brennard Jan 1985

Preliminary Identification, Analysis, And Classification Of Odor-Causing Mechanisms Influenced By Decreasing Salinity Of The Great Salt Lake, C. Earl Israelsen, Darwin L. Sorensen, Alberta J. Seierstad, Charlotte Brennard

Reports

Introduction: The rising level of the Great Salt Lake has received a great deal of attention because of the resulting physical damage to adjoining properties, threatened distruption of major transportation facilities, and environmental damage to feeding and resting areas for migratory waterfowl. Another problem of growing concern is that some zones of the lake are producing odors that are objectionable to nearby populated areas. These odors are most offensive during the warm summer months and appear to be increasing with the rising levels and decreasing salinity of the lake water. This report presents the approach taken and the findings of …


Evaluation Of Miramat Under High Velocity Flows, C. Earl Israelsen, Frank W. Haws Jan 1985

Evaluation Of Miramat Under High Velocity Flows, C. Earl Israelsen, Frank W. Haws

Reports

Introduction: Newly constructed earth channels and steep cut and fill slopes on construction projects need temporary protection from water erosion until a protective cover of vegetation can be grown. In some instances the temporary protective measures can be left in position to serve as part of the permanent system. Various kinds of vegetative and chemical mulches are available for use as temporary control measures, and other materials such as jute, fiberglass roving, and excelsior blanket are also in use. However, for large volumes of flow and for high velocities, more substantial materials are required. One class of such materials is …


Identification And Modeling The Impact Of Marine Shale Bedrock On Groundwater And Stream Salinity: Upper Colorado River Basin, Christopher J. Duffy, Jerome J. Jurinak, Sanjay Sangani, Ali Azimi Jan 1985

Identification And Modeling The Impact Of Marine Shale Bedrock On Groundwater And Stream Salinity: Upper Colorado River Basin, Christopher J. Duffy, Jerome J. Jurinak, Sanjay Sangani, Ali Azimi

Reports

Recent studies have shown that groundwater is a major contributor to stream salinity in the Upper Colorado River Basin. The primary salt sources are the marine shales and shale residuum that underlie the soils of much of the basin. A field site in the Price River Basin, a tributary to the Green and Colorado Rivers, was selected to study the physical and chemical factors that control the interactions between groundwater and these shales. Preliminary data were available at the site as a result of a Bureau of Reclamation study conducted by CH2M Hill. On the basis of the CH2M Hill …


Water Education Grades K-6, Donald R. Daugs, C. Earl Israelsen Jan 1985

Water Education Grades K-6, Donald R. Daugs, C. Earl Israelsen

Reports

Preface: Water Activites for Elementary Children is based upon the assumption that children learn best by doing. In education, and especilly in science, talking is not necessarily teaching. The most desireable types of learning involve direct, first hand experience, not just a teacher's interpretation of these experiences. This set of learning experiences has been designed for teachers, teachers-in-training, and children, Each concept includes background information for the teacher and learning activities for the children. Lessons are designed so taht a teacher can successfully teach a unit or lession with a minimum of knowledge, preparation, and equipmnet. Most of the suggested …


Arkansas Water Resources Research Center Pamphlet, Richard L. Meyer Jan 1985

Arkansas Water Resources Research Center Pamphlet, Richard L. Meyer

Arkansas Water Resources Center Technical Reports

Arkansas Water Resources Research Center (AWRRC), through research is committed to meeting the many and varied challenges presented to water quality by Arkansas' burgeoning urban, agricultural, and recreational water demands.


Analysis Of Arkansas Fur Harvest Records - 1942-1984: I. State And Regional Accounts, Gary A. Heidt, James H. Peck, Tiny Sheldon, Joseph D. Clark Jan 1985

Analysis Of Arkansas Fur Harvest Records - 1942-1984: I. State And Regional Accounts, Gary A. Heidt, James H. Peck, Tiny Sheldon, Joseph D. Clark

Journal of the Arkansas Academy of Science

Fur harvest records maintained by the Arkansas Game and Fish Commission from 1942-1984 summarized the number of pelts sold by region (Ozark Mountains, Ouachita Mountains, Gulf Coastal Plain, and Mississippi Delta) and the average price per pelt for 16 furbearers. Analysis of these records showed that in the 1979-80 trapping season (the record year for both harvest and value both in Arkansas and the nation), the value of the Arkansas fur harvest ranked 14th nationally (2.12% of total national value). Fur harvests in Arkansas were high in the 1940's, declined in the 1950's and 1960's and then experienced a rapid …


Analysis Of Arkansas Fur Harvest Records - 1942-1984: Ii. Species Accounts, James H. Peck, Joseph D. Clark, Tiny Sheldon, Gary A. Heidt Jan 1985

Analysis Of Arkansas Fur Harvest Records - 1942-1984: Ii. Species Accounts, James H. Peck, Joseph D. Clark, Tiny Sheldon, Gary A. Heidt

Journal of the Arkansas Academy of Science

Fur harvest records were maintained by the Arkansas Game and Fish Commission on the following 16 furbearers: badger, beaver, bobcat, eastern spotted skunk (civet), coyote, gray fox, long-tailed weasel, mink, muskrat, nutria, opossum, raccoon, red fox, red wolf, river otter, and striped skunk. These harvest records were analyzed for each species in terms of mean pelt price and numbers of pelt sold by region (Ozark Mountains, Ouachita Mountains, Gulf Coastal Plain, and Mississippi Delta) per year. Historical or biological influences important in interpreting species accounts are presented.


Model To Predict Arkansas Gray Fox Fur Harvests, James H. Peck, Gary A. Heidt Jan 1985

Model To Predict Arkansas Gray Fox Fur Harvests, James H. Peck, Gary A. Heidt

Journal of the Arkansas Academy of Science

Linear regression analysis of total gray fox (Urocyon cinereoargenteus) fur harvests from 1954-1983 in Arkansas showed a high correlation with mean pelt values (r = 0.956). Single variable models using linear regression analyses of current season's pelt values (CSPV) and previous season's pelt values (PSPV) were designed to predict fur harvests. These models demonstrated high correlations for predicting harvests (r = 0.933 and r = 0.893 respectively). Regional analyses revealed a high correlation between mean pelt values and harvest for the Ozark Mountain region (r = 0.923), Ouachita Mountain region (r = 0.971 ), and Gulf Coastal Plain (r = …


Response Of Fishes To Revetment Placement, C. H. Pennington, S. S. Knight, M. P. Farrell Jan 1985

Response Of Fishes To Revetment Placement, C. H. Pennington, S. S. Knight, M. P. Farrell

Journal of the Arkansas Academy of Science

Routine fish sampling with hoop nets was conducted monthly from April through December 1978 along natural and revetted riverbanks on the lower Mississippi River near Eudora, Arkansas, to monitor changes in fish populations affected by placement of new revetment for bank protection. Eighteen species of fish were collected with four species comprising over 75% of the total catch. During the months prior to revetment placement, freshwater drum, Aplodinotus grunniens, was the most abundant (32.7% of the catch) species collected. Following in abundance were the flathead catfish, Pylodictis olivaris, (9.8%), common carp, Cyprinus carpio, (7.8%), and blue catfish, Ictalurus furcatus, (3.3%). …


Fluctuations And Relationships Of Selected Physiochemical Parameters In Dardanelle Reservoir, Arkansas, 1975-1982, John D. Rickett, Robert L. Watson Jan 1985

Fluctuations And Relationships Of Selected Physiochemical Parameters In Dardanelle Reservoir, Arkansas, 1975-1982, John D. Rickett, Robert L. Watson

Journal of the Arkansas Academy of Science

Annual and seasonal fluctuations and relationships are described for discharge, turbidity, chloride, total hardness, conductivity and suspended solids over an eight-year period in Dardanelle Reservoir. The parameters fluctuated rather widely primarily in response to seasonal patterns of rainfall. Chloride and conductivity were related and generally fluctuated together as did turbidity and suspended solids. Hardness appeared to vary independently of the others prior to 1979 then varied more closely with chloride after March 1979. Inherent differences between the Illinois Bayou arm and the main Arkansas River sections complicated the precise identification of any overall impact of power plant operation. No significant …


Lime Needs And Trends In Arkansas, Clifford S. Snyder, Stanley L. Chapman Jan 1985

Lime Needs And Trends In Arkansas, Clifford S. Snyder, Stanley L. Chapman

Journal of the Arkansas Academy of Science

Consumption of agricultural lime in Arkansas declined significantly during the past seven years. During each of the past four years, lime consumption was lower than any time since 1960. The quantity of lime needed for optimum crop production on Arkansas' soils is estimated to be 2,678,700 metric tons (MT) (3,000,000 tons), based on University of Arkansas soil testing summaries. Since 1980, less than 285,728 MT(320,000 tons) of lime have been used each year. It is the natural tendency for most soils in Arkansas to become more acidic with time. Periodic addition of agricultural limestone, however, can neutralize soil acidity and …


Watershed Land Uses And Phosphorus Export Coefficient Relationships: A Planning Tool For Lake Resources Management, Carl R. Stapleton Jan 1985

Watershed Land Uses And Phosphorus Export Coefficient Relationships: A Planning Tool For Lake Resources Management, Carl R. Stapleton

Journal of the Arkansas Academy of Science

Relationships between nonpoint source pollutant loadings and water quality degradation in lakes have been established. However, practical methodologies necessary to identify and manage nonpoint sources in accordance with lake water quality indices have been lacking. Objectives of the current study were as follows: (1) to compare predicted model values for in-lake total phosphorus (TP) concentrations with actual values; and (2) to determine the applicability of areal phosphorus loading models for lake resources management. The research site was located 19 km west of the City of Little Rock in the Lake Maumelle basin. Areal total phosphorus (TP) loadings in g m^-2yr^-1 …


Changes In Forest Soils Following Clearcutting Of Pine Forests In The Ouachita Mountains Of Arkansas, Harlan R. Stoin, Bajuri Bin Kadmin, Lyell F. Thompson Jan 1985

Changes In Forest Soils Following Clearcutting Of Pine Forests In The Ouachita Mountains Of Arkansas, Harlan R. Stoin, Bajuri Bin Kadmin, Lyell F. Thompson

Journal of the Arkansas Academy of Science

Soil characteristics of the mineral surface soil (0-6 cm) on three small watersheds in the Ouachita Mountains of Arkansas from which the pine forests have been clearcut, crushed, and burned for site preparation were studied for the first two years following clearcutting and compared to soils from adjacent uncut pine forest watersheds. Following clearcutting and burning, soil pH was generally higher than in uncut forest soils. The greatest pH differences occurred within several months of burning and generally decreased through the end of the second year. Soil organic matter content was lower immediately following clearcutting and burning and increased to …


Environmental Perception And Its Impacts On The Tourist Industry: A Case Study Of The Niagara Region, Donna Marie Senese Jan 1985

Environmental Perception And Its Impacts On The Tourist Industry: A Case Study Of The Niagara Region, Donna Marie Senese

Theses and Dissertations (Comprehensive)

The natural resources of the Niagara Region of Ontario have played an important role in the success of the tourist industry in the region. The Niagara Region has been developed on an industrial and agricultural base since the nineteenth century. Due to conflicting demands of the manufacturing, agricultural and tourism industries for aesthetic, recreational and waste disposal purposes, the physical environment has deteriorated. The research problem of this thesis is to determine the extent of the effect of this deteriorated environment upon the tourist industry in the Niagara Region.

Physical inventories of resources are not adequate in terms of evaluating …


Ending Subsidized Degradation: The Ocean Dumping Example, Brenda Asher Dillman Dec 1984

Ending Subsidized Degradation: The Ocean Dumping Example, Brenda Asher Dillman

Marine Affairs Theses and Major Papers

There is no way to measure, on a global scale, the pollution dumped directly into the oceans, let alone all the tens of thousands of particulates, toxics, and gaseous substances are added each day to the atmosphere surrounding the New York Bight. The aim of this paper is to develop a user fee framework for the ocean dumping of municipal sludge. Such a proposal requires a radical departure from the standards and enforcement approach of today's legislation. The ocean dumping of municipal sludge, while accounting for only a small percentage of the total waste dumped into the Bight, has proven …