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Articles 49351 - 49380 of 52423
Full-Text Articles in Entire DC Network
Erosion Control Product Testing, C. Earl Israelsen, Eugene K. Israelsen, Joel E. Fletcher, Jerald S. Fifield, Ronald V. Canfield
Erosion Control Product Testing, C. Earl Israelsen, Eugene K. Israelsen, Joel E. Fletcher, Jerald S. Fifield, Ronald V. Canfield
Reports
Introduction: Fibrex Corporation has capability for manufacturing various blends of cellulose fibers which have been used at locations throughout the country for temporarily controlling erosion on denuded land areas, and for serving as growth media for grass and other vegetation. Soil and climatic conditions vary greatly where these products are used, and it is not possible to determine by observation whether one is more effective than another in controlling erosion or promoting vegetative growth. Fibrex is desirous of knowing with some degree of confidence which products have the highest level of erosion control so that additional efforts can be directed …
Domestic Water Demand In Utah, Trevor C. Hughes, Robert Gross
Domestic Water Demand In Utah, Trevor C. Hughes, Robert Gross
Reports
Multiple regression and frequency analysis of average month, peak month, peak day, and instantaneous water use by various water supply systems in Utah and Colorado are used to develop water demand functions. The research objective was to predict water demand as a function of a small number of independent variables for which data were easily obtainable and thereby provide an attractive method for use by consulting engineers inf uture planning studies. The independent variables in landscaped area and accounts for use of supplementary ditch or pressure irrigation systems. The demand functions were developed with data from a sample of 14 …
Tabulation And Application Of Pan Evaporation Data For Utah Through 1976, Kenneth G. Hubbard
Tabulation And Application Of Pan Evaporation Data For Utah Through 1976, Kenneth G. Hubbard
Reports
Monthly values of evaporation, wind movement and water temperatures are presently for all available station in Utah. A brief review is given of factors which effect evaporation along with several examples of how pan evaporation data ware used.
Program Development Plan For An Operational Cloud Seeding Project In Utah With Evaluation Included, Geoffrey E. Hill
Program Development Plan For An Operational Cloud Seeding Project In Utah With Evaluation Included, Geoffrey E. Hill
Reports
- Operation Framework
In the arid climate of Southern and Central Utah, there is a continuing need to augment water supplies. While much of the water is needed for summertime use, particularly for irrigation, most of the available water is supplied by winter storms. Therefore, it is for the augmentation of the water stored naturally as snowpack at higher elevations that cloud seeding can make its greatest contribution.
Over the past several years, an attempt has been made to augment the snowpack by cloud seeding. Although there is a physical basis for expecting an increase in precipitation from a scientifically managed …
Research On Increased Winter Orographic Precipitation By Cloud Seeding (Fy 1979) Development Of Cloud Seedability Criteria, Geoffrey E. Hill
Research On Increased Winter Orographic Precipitation By Cloud Seeding (Fy 1979) Development Of Cloud Seedability Criteria, Geoffrey E. Hill
Reports
This research continues the exploration of improved cloud seeding technology through the use of airborne seeding, cloud physics measurements from a research aircraft and ground based measurements for the purpose of understanding transport and diffusion of seeding material, developing seedability criteria, and documenting in-cloud responses to seeding. Development of precipitation measuring and memory devices was continued with the aim of obtaining a network of gages well suited for measurement of winter snowfall in mountainous regions. Results of the research are highlighted by the development of criteria for seeding winter orographic storms. It was found that the cloud top temperature and …
Historical And Projected Municipal And Industrial Water Usage In Utah 1960-2020, Roger D. Hansen, Herbert H. Fullterton, A. Bruce Bishop, Trevor C. Hughes, Ronald Christensen, Davis S. Bowles, Kyle Matteson, Hershel G. Hester Iii, Ronald Mead, Randy Simmons
Historical And Projected Municipal And Industrial Water Usage In Utah 1960-2020, Roger D. Hansen, Herbert H. Fullterton, A. Bruce Bishop, Trevor C. Hughes, Ronald Christensen, Davis S. Bowles, Kyle Matteson, Hershel G. Hester Iii, Ronald Mead, Randy Simmons
Reports
This publication reports the results of a municipal and industrial water use inventory. Data reported covers the period 1960 through 1976. Time series information is aggregated from municipal and industrial system level to country and state totals. Total municipal and industrial withdrawals are divided between surface and groundwater sources. Yearly per capital withdrawal rates are estimated for 50 Utah municipalities and for each of Utah’s 29 counties. Per capita withdrawal rates range from a high of over 400 gallons per capita per day (gcd) in the communities of Delta, Fillmore, Hyrum, Logan, and Morgan to a low of 100 gcd …
Modeling The Performance Of The Intermittent Sand Filter, P. A. Cowan, E. J. Middlebrooks
Modeling The Performance Of The Intermittent Sand Filter, P. A. Cowan, E. J. Middlebrooks
Reports
Several models were developed to predict the efficiency of the intermittent sand filter (ISF) in removing algae from wastewater stabilization pond effluent; volatile suspended solids (VSS) was the analytical technique used to identify algal concentrations. The first (ISF model) and second (modified ISF model) models consisted of two distinct portions: a surface algal layer (SAL) component and a sand phase component. In the ISF model, the sand phase component was described in terms of 20 empirical sand filter efficiency terms (20 ^ coefficients); in the modified ISF model, a functional relationship between ^ and filter depth was developed. The modified …
Groundwater Heat Pump: An Efficient Way To Heat And Cool Your Home, Calvin G. Clyde, E. W. Vendell, K. Hagen
Groundwater Heat Pump: An Efficient Way To Heat And Cool Your Home, Calvin G. Clyde, E. W. Vendell, K. Hagen
Reports
Engineers at the Utah Water Research Laboratory and the Mechanical Engineering Department at Utah State University have looked into the evonomic feasibility of groundwater heat pumps for residential heating and cooling in the Utah climate. They have found that this type of system conserves evergy and may cost less than conventional heating systems. By using a heat pump, thermal energy can be taken from goundwater and can be used to heat homes in the winder and cool them in the summer. If you are a Utah homeowner in an area where the goundwater heat pump system is economical, you may …
A Resource Survey Of Hydroelectric Power Potential In Utah And Southeast Idaho, Calvin G. Clyde, Eugene K. Israelsen, Win-Kai Liu
A Resource Survey Of Hydroelectric Power Potential In Utah And Southeast Idaho, Calvin G. Clyde, Eugene K. Israelsen, Win-Kai Liu
Reports
N searching for alternative sources of energy to supply growing demands, it is essential that renewable sources by thoroughly considered. An essential early step in further hydroelectric power development is to understand in detail the amount and location of the resource. This survey of hydroelectric power potential covers the entire State of Utah, the Bear River Basin in Idaho and Wyoming, and the small part of the Snake River drainage lying in the Utah Power and Light Company service area in Idaho. Streams were covered initially if their flow was estimated to exceed 36 cfs 50 percent of the time. …
Erosion Control During Highway Construction: Volume 1, Calvin G. Clyde, C. Earl Israelsen, Paul E. Packer
Erosion Control During Highway Construction: Volume 1, Calvin G. Clyde, C. Earl Israelsen, Paul E. Packer
Reports
Summary: Highway constuction as we know it today is a high-risk activity with respect to engendering soil erosion. In earlier days of road building, when rights-of-way were generally narrow and excavations mostly shollow, erosion was rarely a serious problem. Only occasionally was it considered necessary to design and apply specific measures for erosion control. With the advent of the superhighway involving far greater widths of right-of-way, and much deeper disturbance of the natural ground to affort the horizontal and vertical highway geometry necessary for high-speed travel, came a several fold increase in erosion potential and a direct need for specific …
Effects Of Oil Shale Leachate On Phytoplankton Productivity, Mary Louise Cleave, V. Dean Adams, Donald B. Porcella
Effects Of Oil Shale Leachate On Phytoplankton Productivity, Mary Louise Cleave, V. Dean Adams, Donald B. Porcella
Reports
The effects of oil shale leachate and salinity additions on the productivity of freshwater algae were studied in the laboratory using batch bioassays. These batch bioassays were used to screen variations of ten salts in single and multiple additions of all possible combinations of the ten salts; water extractions of different processed and unprocessed oil shales; and the concentration effects of both the salts from 0.3 N to 0.05 N as NaCl and the oil shale extractions on the growth of standard test algae and indigenous algae from Lake Powell. The batch bottle bioassays were conducted following the standard algal …
Pre-Impoundment Water Quality Study For The Dominguez Project, Larry Baker, V. Dean Adams, Leslie G. Terry, Jerald S. Fifield, Darwin L. Sorensen
Pre-Impoundment Water Quality Study For The Dominguez Project, Larry Baker, V. Dean Adams, Leslie G. Terry, Jerald S. Fifield, Darwin L. Sorensen
Reports
Introduction: The U.S. Bureas of Reclamation is currently in the process of evaluating a number of water development projects in Southwest Colorado. As a part of the planning process the Bureasu has conducted a water qualtiy investigation, in cooperations with the UWRL, of the stream segments that will be affected by each project. The data collected in this study were used to evaluate the water quality of each stream segment with respect to various beneficial uses of water (agriculture, raw municipal water supply, protection of the aquatic biota) and will provide a baseline by which to assess the impact of …
Pre-Impoundment Water Quality Study For The Mancos Project, Larry Baker, V. Dean Adams, Leslie G. Terry, Jerald S. Fifield, Darwin L. Sorensen
Pre-Impoundment Water Quality Study For The Mancos Project, Larry Baker, V. Dean Adams, Leslie G. Terry, Jerald S. Fifield, Darwin L. Sorensen
Reports
Introduction: The U.S. Bureau of Reclamation is currently in the process of evaluating a number of water development projects in Southwest Colorado. As a part of the planning process the Bureau has conducted a water quality investigation, in cooperation with the UWRL, of the stream segments that will be affected by each project. The data collected in this study were used to evaluate the water quality of each stream segment with respect to various beneficial uses of water (agriculture, raw municipal water supply, protection of the aquatic biota) and will provide a baseline by which to assess the impact of …
Pre-Impoundment Water Quality Study For The Dolores Project, Larry Baker, V. Dean Adams, Leslie G. Terry, Jerald S. Fifield, Darwin L. Sorensen
Pre-Impoundment Water Quality Study For The Dolores Project, Larry Baker, V. Dean Adams, Leslie G. Terry, Jerald S. Fifield, Darwin L. Sorensen
Reports
No abstract provided.
Pre-Impoundment Water Quality Study For The Mc Elmo Project, Larry Baker, V. Dean Adams, Leslie G. Terry, Jerald S. Fifield, Darwin L. Sorensen
Pre-Impoundment Water Quality Study For The Mc Elmo Project, Larry Baker, V. Dean Adams, Leslie G. Terry, Jerald S. Fifield, Darwin L. Sorensen
Reports
Introduction: The U.S. Bureas of Reclamation is currently in the process of evaluating a number of water development projects in Southwest Colorado. As a part of the planning process the Bureasu has conducted a water qualtiy investigation, in cooperations with the UWRL, of the stream segments that will be affected by each project. The data collected in this study were used to evaluate the water quality of each stream segment with respect to various beneficial uses of water (agriculture, raw municipal water supply, protection of the aquatic biota) and will provide a baseline by which to assess the impact of …
Pre-Impoundment Water Quality Study For The San Miguel Project, Larry Baker, V. Dean Adams, Leslie G. Terry, Jerald S. Fifield, Darwin L. Sorensen
Pre-Impoundment Water Quality Study For The San Miguel Project, Larry Baker, V. Dean Adams, Leslie G. Terry, Jerald S. Fifield, Darwin L. Sorensen
Reports
Introduction: Scope of Study: The United State Bureau of Reclamation (USBR) is currently evaluating plans to construct a multipurpose reservoir on the San Miguel River 32 kilometers (20 miles) below Telluride, Colorado. As part of the environmental assessment for this project, the Utah Water Research Laboratory (UWRL) was contracted to conduct an intensive water quality study on the San Miguel River and its tributaries in the vicinity of the project area. In this study water samples were collected during the period from May, 1977, to August, 1978, on a monthly basis from three sites on the San Miguel River and …
Pre-Impoundment Water Quality Study For The West Divide Project, Larry Baker, V. Dean Adams, Leslie G. Terry, Jerald S. Fifield, Darwin L. Sorensen
Pre-Impoundment Water Quality Study For The West Divide Project, Larry Baker, V. Dean Adams, Leslie G. Terry, Jerald S. Fifield, Darwin L. Sorensen
Reports
Introduction: The U.S. Bureas of Reclamation is currently in the process of evaluating a number of water development projects in Southwest Colorado. As a part of the planning process the Bureasu has conducted a water qualtiy investigation, in cooperations with the UWRL, of the stream segments that will be affected by each project. The data collected in this study were used to evaluate the water quality of each stream segment with respect to various beneficial uses of water (agriculture, raw municipal water supply, protection of the aquatic biota) and will provide a baseline by which to assess the impact of …
Proceedings Of The Utah Water Pollution Control Association, 1979 Annual Meeting, Kathleen E. Bayn
Proceedings Of The Utah Water Pollution Control Association, 1979 Annual Meeting, Kathleen E. Bayn
Reports
Preface: This volume is the third published proceedings of the Utah Water Pollution Control Association's Annual Meeting. The Technical Program of the 1979 Annual Meeting was divided into four separate sessions. The opening session (Session I) provided an overview and direction for the entire meeting. Session II-A: Plant Safety, and Session III-A: Plant Safety, centered on the need for establishing appropriate safety procedures at wastewater installations. Session II-B: Selected Topics, was devoted to technical presentations of speical merit and interest to the local environmental engineering profession. Session III-B: Interim Upgrading, considered various alternatives to upgraiding wastewater facilities on an interim …
Random Differential Equations In Water Quality Modeling, Brad A. Finney, David S. Bowles, Michael P. Windham
Random Differential Equations In Water Quality Modeling, Brad A. Finney, David S. Bowles, Michael P. Windham
Reports
A probabilistic river water quality model is developed with the capability of determinging the joint and marginal probability density function of biochemical oxygen demand (BOD) and dissolved oxygen (DO) at any point in a river. The one dimensional steady-state model can be applied to a river system with any reasonable number of point loads and diversions and lateral surface and subsurface inflow. The model can simultaneously consider randomness in the intital conditions, inputs, and coefficients of the water quality equations. Any empirical or known distribution can be used for the initial condition. The randomness in the water quality equation inputs …
Modelling The Influence Of Eutrophication On The Coldwater Fishery Habitat Of Lake Mcconaughy, A "Two-Story" Reservoir, Melvin W. Taylor
Modelling The Influence Of Eutrophication On The Coldwater Fishery Habitat Of Lake Mcconaughy, A "Two-Story" Reservoir, Melvin W. Taylor
Nebraska Game and Parks Commission: Publications
The lifespan of the existing coldwater habitat in Lake McConaughy is unknown, To promulgate effective management and regulatory strategies, a method of predicting this lifespan was needed, Ideally, this procedure should also provide potential management philosophies that would retard eutrophication, The LAKSCI computerized simulation model of Systems Control, Inc, was modified to assist in solving this problem, Data for model input were collected from August 1976 to August 1978. When calibrated the model proved satisfactory for predicting water level and temperatures, but unsatisfactory in prediction of water chemistry without additional data and refinement,
Niobrara-Missouri River Fishery Investigations, Larry W. Hesse, Gene Zeurlein, Roger Vancil, Leonard Koziol, Brad Newcomb, Leigh Ann Retelsdorf
Niobrara-Missouri River Fishery Investigations, Larry W. Hesse, Gene Zeurlein, Roger Vancil, Leonard Koziol, Brad Newcomb, Leigh Ann Retelsdorf
Nebraska Game and Parks Commission: Publications
The Niobrara River heads in the table lands of eastern Wyoming and flows 786 kilometers (km) eastward across Nebraska joining the Missouri River near the town of Niobrara, Nebraska. The Niobrara is the largest Missouri River tributary between the last two mainstem impoundments (Lake Francis Case and Lewis and Clark Lake). Fish movement up the Niobrara is prevented by Nebraska Public Power District's (NPPD's) Spencer Hydroelectric Dam, 63.3 km upstream from the river mouth. The lower reach of the river is turbid and carries a considerable load of sand, silt, and organic debris into the Missouri River. The mean annual …
Nebraska Rainbow Trout, Nebraska Game And Parks, G. Zeurlein, L. Hesse, J. Seeb, L. Wishard
Nebraska Rainbow Trout, Nebraska Game And Parks, G. Zeurlein, L. Hesse, J. Seeb, L. Wishard
Nebraska Game and Parks Commission: Publications
Chapter 1 Lethal and Preferred Temperatures of Lake McConaughy Rainbow Trout Versus Domestic Strain Rainbow Trout By R. Vancil, G. Zuerlein and L. Hesse
Chapter 2 A Nitrifying Filter-Cooling Condenser System for Total Water Re-use in Cold-Water Fish Holding or Rearing Applications By L. Hesse, G. Zuerlein and R. Vancil
Chapter 3 Biochemical Genetic Analysis of Two Strains of Nebraska Rainbow Trout By J. Seeb and L. Wishard
The self-sustaining rainbow trout population living in Lake Mcconaughy and the North Platte River tributaries is unique to the Great Plains region. The population spends most of its adult life in the …
Production Of Synthetic Ampholytes For Isoelectric Focusing, Kenneth A. Pearson, David W. Oates
Production Of Synthetic Ampholytes For Isoelectric Focusing, Kenneth A. Pearson, David W. Oates
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
Synthetic ampholytes can be prepared inexpensively in a small laboratory 0 With approximately $200.00 of glassware (less if some components available), vacuum source, heat source and $5.00 worth of chemicals, one can prepare liters of ampholytes (ph range 3-10). Commercial prices now range from $75.00 to $100.00 for 25 ml, so a substantial savings can be realized.
Critical Areas Planning In Minnesota, Clifton J. Aichinger
Critical Areas Planning In Minnesota, Clifton J. Aichinger
Journal of the Minnesota Academy of Science
The Critical Areas Planning Program was established by Minnesota legislation in 1973. Its primary work is with local units of government, regional or state agencies located within areas possessing significant natural, scientific, cultural or historical resources to develop consistent plans and regulations for area use and management. Local units of government prepare the plans and regulations according to guidelines approved by the governor for each critical area'. with technical and financial assistance from the Environmental Quality Board (EQB). The enabling act directed the EQB to develop an inventory of potential critical areas in the state. Inventory methods were evaluated. The …
Saving The State From Rabbits, Department Of Agriculture, Western Australia
Saving The State From Rabbits, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
A thoughtful look at the rise and fall of rabbit populations in Western Astralia and the work done to achive the current levels.
Additional Comments On Reproductive Strategies And Population Fluctuations In Microtine Rodents, Michael S. Gaines, William M. Schaffer, Robert K. Rose
Additional Comments On Reproductive Strategies And Population Fluctuations In Microtine Rodents, Michael S. Gaines, William M. Schaffer, Robert K. Rose
Biological Sciences Faculty Publications
Recently, Schaffer and Tamarin (1973) proposed a model relating changes in reproductive effort (RE) to fluctuating densities in microtine rodents (lemmings and voles). They assumed (and presented data supporting this assumption) that the major effect of increased crowding would be a reduction in survival among prereproductives, thereby lowering the effective fecundity (Schaffer and Rosenzweig 1977) of their parents. As a consequence, Schaffer and Tamarin argued that the optimal reproductive expenditure, E(N), should decline with increasing population size, N. They also deduced the shape of the zero-growth isocline, N*(E), for differing levels of RE and plotted both E(N) and N*(E) on …
Grain Crop Variety Trials Western Australia 1978-1979, H. M. Fisher, G. B. Crosbie
Grain Crop Variety Trials Western Australia 1978-1979, H. M. Fisher, G. B. Crosbie
Grain and other field crops research reports
The regional crop variety testing programme conducted by the Western Australian Department of Agriculture covers the final two stages of a four stage process of evaluating locally produced crossbreds and introduced material comprising:-
Plant Breeder Trials
Stage 1: Initial small plot yield tests on early generation material - 1 to 3 sites. Stage 2: Small plot yield tests on selected material (F5 derived) - 3 to 4 sites.
Regional Testing Programme
Stage 3: Large scale preliminary trials - 9 to 10 sites. Stage 4: Large scale final yield trials - 40 to 50 sites.
The basis of the regional programme …
Sand Dune Project Stabilises Erosion, Department Of Agriculture, Western Australia
Sand Dune Project Stabilises Erosion, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
Read how the Department of Agriculture's Soil Conservation Service and the Department of Conservation and Environment worked with the Rockingham Shire to upgrade the road and protect the sand dunes.
Contour Cultivation : Cheap Erosion Control, T R. Negus, B. Barrett
Contour Cultivation : Cheap Erosion Control, T R. Negus, B. Barrett
Journal of the Department of Agriculture, Western Australia, Series 4
Although the benefits of contour cultivation are well recognised, it makes cultivation more difficult, particularly if the paddock is split by contour banks and grassed waterways. However, a comparison east of Pingelly indicates that contour cultivation is little more expensive or time-consuming than ordinary cultivation.
Population And Productivity Of A Flock Of Giant Canada Geese In Northeastern South Dakota, Ted A. Clausing
Population And Productivity Of A Flock Of Giant Canada Geese In Northeastern South Dakota, Ted A. Clausing
Electronic Theses and Dissertations
Population and productivity studies of giant Canada geese (Branta canadensis maxima) were conducted in northeastern South Dakota in 1976 and 1977. One hundred ninety-three of 436 randomly selected sample quarter sections on the 5,459 km2 area contained potential goose nesting habitat in 1976. Forty-six pairs, 6 indicated pairs, and 6 single geese were found on these 193 quarter sections during the 1977 nesting season. The population was estimated to be 1,880 geese. Recommendations were to continue aerial surveys in the spring and late summer and to supplement them with annual searches of the sample quarter sections used in this study. …