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Articles 7531 - 7560 of 8291
Full-Text Articles in Physical Sciences and Mathematics
Design Of A Reliable, Inexpensive Recording Rain Gage Which Utilizes Solid-State Memory, Stephen A. Dyer
Design Of A Reliable, Inexpensive Recording Rain Gage Which Utilizes Solid-State Memory, Stephen A. Dyer
KWRRI Research Reports
Researchers working in the general area of water resources frequently have need for precipitation data. Unfortunately, the cost of commercially available recording rain gages is often greater than $1,000 per unit. This report describes a microprocessor-controlled remote recording rain gage which is capable of unattended operation for periods of greater than a month that costs less than $400 in single quantities. The laboratory prototype uses a tipping bucket to collect precipitation in 0.01-inch increments. The time of the bucket tip is stored, using an offset binary format, in solid-state memory. A complete description of the gage hardware is presented along …
Extreme Evapotranspiration By Irrigated Alfalfa: A Consequence Of The 1976 Midwestern Drought, Norman J. Rosenberg, Shashi B. Verma
Extreme Evapotranspiration By Irrigated Alfalfa: A Consequence Of The 1976 Midwestern Drought, Norman J. Rosenberg, Shashi B. Verma
Drought Mitigation Center: Faculty Publications
The rate of evapotranspiration by irrigated alfalfa at Mead, NE (41°09'Nj 96°30'W, elevation 354 m) reached record levels in 1976. Evapotranspiration was measured with precision weighing lysimeters in a field 1.9 ha in size. Evapotranspiration ranged during the growing season from 4.75 to 14.22 mm day-l and exceeded 10 mm day-I on one-third of the days studied. On each day of study the ratio of latent heat flux density (LE) to the sum of the net radiation and soil heat flux densities (Rn+S) was such that LE/ (Rn+S) > 1, indicating the occurrence of significant …
Volume 2, Number 2 (February 1978), The Otec Liaison
Volume 2, Number 2 (February 1978), The Otec Liaison
The OTEC Liaison
No abstract provided.
Water Current, Volume 10, No. 1, January/February 1978
Water Current, Volume 10, No. 1, January/February 1978
Water Current Newsletter
Nebraska Water Resources Center Annual Report 1977
Water Resources Seminars
Deadline for Submitting Annual Allotment Proposals
Slide-Tape Show Available
Grantsmanship Training Program Planned
Paper Presented at AGU Meeting
Water Resources in Nebraska
Manuel Morris Named OWRT Deputy Director
National Irrigation Water Study Announced
New Director at New Mexico
Model Implementation Program (USDA-EPA)
Workshop on Storm Sewer Design
AWRA Conference
Papers Solicited for ASAE Meeting
Short Course on Unsteady Flow in Pipelines
Research Review: Nitrogens Losses from Sprinkler Applied Nitrogen Fertilizer
Dickey-Lincoln School Lakes, Maine, Hydro-Power Decision, October 27, 1978, James B. Longley
Dickey-Lincoln School Lakes, Maine, Hydro-Power Decision, October 27, 1978, James B. Longley
Dickey-Lincoln School Lakes Project
The Dickey-Lincoln School Project would consist of two earthfill structures designed to produce peaking and modest intermediate load power from the St. John River The larger of the two dams, the Dickey Dam, would be located immediately above the confluence of the Allagash and St. John Rivers. The Lincoln School Dam would also be located on the Upper St. John River, eleven miles downstream from the Dickey Dam. The Dickey Dam would have a total length of 10,600 feet and a maximum height of 335 feet. The Lincoln School Dam is considerably smaller and would be 1,600 feet long and …
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix E: Aquatic Ecosystem And Fisheries Studies (Supplement), Christoipher J. Schmitt, Dennis R. Sasseville, Normandeau Associates, Inc., New England Division, United States Army Engineer Division
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix E: Aquatic Ecosystem And Fisheries Studies (Supplement), Christoipher J. Schmitt, Dennis R. Sasseville, Normandeau Associates, Inc., New England Division, United States Army Engineer Division
Dickey-Lincoln School Lakes Project
Sediment mercury concentrations higher than levels normall y considered trace or background were encountered up to 80 cm belo w the sediment-water interface in samples obtained from four oligotrophi c lakes in northern Maine . These lakes are in three different watershed s and are as far as 65 km apart . The values reported are far lower than levels reported elsewhere from contaminated sites . The distributio n and magnitude of the sediment concentrations encountered suggest long-ter m diffuse mercury inputs to the lakes from the watersheds . In addition , concentrations up to twice as high in near-surface …
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix C: Social & Economic Assessment (Supplement 1), Pamela D. Savetsky, New England Division, United States Army Engineer Division
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix C: Social & Economic Assessment (Supplement 1), Pamela D. Savetsky, New England Division, United States Army Engineer Division
Dickey-Lincoln School Lakes Project
A review of available literature on rural communities which have been affected by construction projects of a similar scale has been completed. This review will aid in the development of a scenario of the construction labor peak and decline effects on the Dickey-Lincoln area.
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix J: Coordination With Other Agencies & Public Involvement (Supplement), New England Division, United States Army Corps Of Engineers
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix J: Coordination With Other Agencies & Public Involvement (Supplement), New England Division, United States Army Corps Of Engineers
Dickey-Lincoln School Lakes Project
This agency will be particularly concerned about any impact which this project might have on any existing, proposed or known units of the National Park System, or any known historic, natural or environmental education sites which are currently part of , or eligible for, the National Landmark Program. This report is a planning aid for the proposed Dickey-Lincoln Dams and Reservoirs project in Maine. A number of endangered, rare, or unique animal species are known or suspected to occur in the project area.
An Evaluation Of The Effects Of Dredging Within The Arkansas River Navigation System - Volume I - Introduction, Summary And Conclusions, And Recommendations, Arkansas Water Resources Research Center
An Evaluation Of The Effects Of Dredging Within The Arkansas River Navigation System - Volume I - Introduction, Summary And Conclusions, And Recommendations, Arkansas Water Resources Research Center
Technical Reports
The foundation for the development of the Arkansas River was laid with the authorization of many upstream reservoirs in the comprehensive River and Harbor Act of 1946 signed by President Truman. Subsequent authorizations were forthcoming and work began on many of the bank stabilization facilities in 1950 and on the major structures in 1957. The current McClellan-Kerr Arkansas River Navigation System was substantially completed in 1972. The authorized multiple-purpose plan for the Arkansas River and tributaries provided for the construction of coordinated developments in the interests of navigation, hydroelectric power, flood control, bank stabilization, and related benefits including recreation and …
Volume 1, Number 6 (January 1978), The Otec Liaison
Volume 1, Number 6 (January 1978), The Otec Liaison
The OTEC Liaison
No abstract provided.
Social And Spatial Relationships Of Coyote Families And Neighboring Coyotes, Althoff D. P.
Social And Spatial Relationships Of Coyote Families And Neighboring Coyotes, Althoff D. P.
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Studies On The Role Of Solar Ultraviolet Radiation In "Natural" Water Purification By Aquatic Ecosystems, John Calkins, Jeanne A. Barcelo, Perry Grigsby, Stephen Martin
Studies On The Role Of Solar Ultraviolet Radiation In "Natural" Water Purification By Aquatic Ecosystems, John Calkins, Jeanne A. Barcelo, Perry Grigsby, Stephen Martin
KWRRI Research Reports
The possibility that pollution might deplete the stratospheric ozone layer and intensify solar UV at the earth's surface focuses attention on the role of solar UV in the various ecosystems at the earth's surface. Previous studies suggested that solar UV might contribute to bacterial die off in wastewater and the studies reported here were directed toward elucidating the action of solar UV in "natural" waters.
It has been assumed that solar UV action on aquatic ecosystems can be evaluated (using proper models) on the basis of the following four independently measurable quantities: I) the intensity of solar UV at the …
Hydrology And Water Quality In The Central Kentucky Karst: Phase Ii Part A: Preliminary Summary Of The Hydrogeology Of The Mill Hole Sub-Basin Of The Turnhole Spring Groundwater Basin, James F. Quinlan, Donald R. Rowe
Hydrology And Water Quality In The Central Kentucky Karst: Phase Ii Part A: Preliminary Summary Of The Hydrogeology Of The Mill Hole Sub-Basin Of The Turnhole Spring Groundwater Basin, James F. Quinlan, Donald R. Rowe
KWRRI Research Reports
Water from upland areas flows to small ephemeral and perennial springs that feed sinking streams that are tributary to low-order cave streams. These cave streams, also recharged by diffuse percolation, are part of a dendritic network in which intermediate-order streams join high-order streams that flow to major trunk streams. The trunk in the Mill Hole Sub-basin flows across the bottom of a large karst window, Mill Hole, and joins the trunk of the Patoka Creek Sub-basin. Their combined discharge bifurcates, flows around the collapsed central core of a larger karst window, Cedar Sink, and re-joins to flow as one to …
Fish Of Lake Mead And Lake Mohave, Robert C. Allan, Dennis L. Roden
Fish Of Lake Mead And Lake Mohave, Robert C. Allan, Dennis L. Roden
Publications (WR)
This publication offers an in-depth study of the fish and other organisms that live in Lakes Mead and Mohave. The history and background of the two lakes is offered, as well as information about diseases, parasites, and unusual fish occurrences. Food sources, predation and competition are also discussed.
Final Report Buffalo National River Ecosystems Part Iv, R. E. Babcock, E. E. Dale, R. L. Meyer, D. G. Parker, E. G. Smith, M. D. Springer
Final Report Buffalo National River Ecosystems Part Iv, R. E. Babcock, E. E. Dale, R. L. Meyer, D. G. Parker, E. G. Smith, M. D. Springer
Technical Reports
Sampling point locations and analytical procedures remained unchanged from those outlined in previous Buffalo National River Ecosystem reports. The only significant change in analytical procedures was a reversion to the glass fiber filter method for collection and extraction of samples for chlorophyll analysis. This change was neeessitated by a need for filtering a larger volume to obtain enough chlorophyll for an accurate measurement. Samples were collected monthly from April 9 through December 30. No samples were taken in January or February due to the extremely uncertain traveling conditions caused by the frequent snows. Prior research indicates that the December 30 …
1978-87 Publications Of The Uwrl, Utah Water Research Laboratory
1978-87 Publications Of The Uwrl, Utah Water Research Laboratory
Reports
This brochure is a listing of publications of the Utah Water Research Laboratory, College of Engineering, at Utah State University, Logan, Utah, for 1978 through 1985. Six categories of publications are included: Atmospheric Water Resources Series, General Series, Hydraulics and Hydrology Series, Water Resources Planning Series, Water Quality Series, and Other Publications. Publications out of print may obtained on a short time loan basis from the UWRL Library. When inquiring about or ordering Utah Water Research Laboratory publications please address: Utah Water Research Laboratory Publications Utah State University Logan, UT 84322-8200
Water Quality Analysis Laboratory Procedures Syllabus, P. A. Cowan, D. B. Porcella, V. D. Adams, L. A. Gardner
Water Quality Analysis Laboratory Procedures Syllabus, P. A. Cowan, D. B. Porcella, V. D. Adams, L. A. Gardner
Reports
Introduction: The 1976 edition of "Methods of Chemical Analysis of Water and Wastes" describes chemical analytical procedures to be sued in Water Quality Office (WQO) laboratoires. The methods were chose through the combined efforts of the Regional Analytical Quality Control (AQC) Coordinators, Laboratory Quality Control Officers, and other senior chemicsts in both federal and state laboratories. Method selection was based on the following criteria: 1. The method should measure the desired constitutent with precision and accuracy suffiecient to meet the data needs of WQO in the presence of the interferences normally encountered in polluted waters. 2. The procedures should utilize …
Research On Increased Precipitation By Cloud Seeding: Development Phase, Geoffrey E. Hill
Research On Increased Precipitation By Cloud Seeding: Development Phase, Geoffrey E. Hill
Reports
Development of several instrumentation systems for measuring atmospheric variables related to winter orogaraphic cloud seeding was undertaken. A heated tipping bucket precipitation gage was modified both for reliable use and accuracy of data. A solid state memory device was also developed at UWRL for this project. A parachute dropsonde for measuring vertical air motion was further developed. In addition, instrumentation was placed on board an aircraft for measuring concentrations of super cooled water, ice nuclei, and ice crystals. Airborne measurements during cloud seeding with silver iodide showed that the plumes of seeding material could be detected over a target area, …
Economic Impacts Of Two Proposed Power Plants On Utah's Irrigated Agriculture, Rangesan Narayanan
Economic Impacts Of Two Proposed Power Plants On Utah's Irrigated Agriculture, Rangesan Narayanan
Reports
Introduction: The impact on agriculture of a large coal-fired stream electic plant (such as the proposed Intermountain Power Project near Lynndyl, Utah) or a large nuclear electic plant (such as proposed for the Green River Site near Emery, Utah) depends on a large number of factors. Among the most important are the technology used in power plant design, the site-characteristics of the plant location, the availability of water resources in the vicinity of the plant, the quality of the available water, and the types of agricultural uses and their water requirements. Some of these factors can be defined by obtaining …
Development Of An Erosion Model And Its Application To Phosphate Mine Dumps In Southeastern Idaho, Vinod Prabhakar, Roland W. Jeppson, Loren R. Anderson
Development Of An Erosion Model And Its Application To Phosphate Mine Dumps In Southeastern Idaho, Vinod Prabhakar, Roland W. Jeppson, Loren R. Anderson
Reports
Based on the equations of continuity and motion for sediment transport and the dynamic equation of spatially varied open channel flow, a computer simulation of erosion is developed. The water source for the erosion simulation may be rainfall or snowmelt. To provide snowmelt a computer simulation giving the rate of snowmelt from limited climatic data has been adapted to work conjunctively with the erosion model to provide a dynamic solution to erosion and overland flow, from precipitation and other limited climatic data. The computer simulation model has been tested using climatic data at and near the phosphate mine in Southeastern …
Engineering Properties And Slope Stability Settlement Analysis Related To Phosphate Mine Spoil Dumps In Southeastern Idaho, Richard E. Riker, Loren R. Anderson, Roland W. Jeppson
Engineering Properties And Slope Stability Settlement Analysis Related To Phosphate Mine Spoil Dumps In Southeastern Idaho, Richard E. Riker, Loren R. Anderson, Roland W. Jeppson
Reports
The engineering properties of waste spoil from phosphate mines in Southeastern Idaho were determined through field and laboratory testing. Based on these properties, the slope stability and settlement characteristics of phosphate spoil dumps were determined. Hypothetical examples illustrate possible modes of foundation failures. Such failures might occur when weak foundation soils exist of when there is a lack of embankment-foundation preparation prior to the disposal of waste material. Adequate protection against slope failure occurring through the embankment material can be accomplished by grading embankment finish slopes to 2 ½ horizontal to 1 vertical or flatter and taking proper caution to …
Unsaturated Transient Flow Through Heterogeneous Soils: Numerical Solutions And Analyses Of Three-Dimensional Axisymmetric Flows, Abdolhossien Nassehzadeh-Tabrizi, Roland W. Jeppson, Lyman S. Willardson
Unsaturated Transient Flow Through Heterogeneous Soils: Numerical Solutions And Analyses Of Three-Dimensional Axisymmetric Flows, Abdolhossien Nassehzadeh-Tabrizi, Roland W. Jeppson, Lyman S. Willardson
Reports
This study deals with unsaturated, unsteady water movement through hetergeneous porous media. The specific problem investigated is the transient three-dimensional sxisymmetric flow resulting from water being applied on a horizontal circular area. The heterogeneity of the soil is described by allowing any or all of the five parameters in the Brooks-Corey equations to be any continuous function of depth. Methodologies for obtaining numerical solutions to the resulting nonlinear partial differential equation and its associated initial-boundary value problem have been developed an dimplemented in a computer program. The numerical solution is based on the Crank-Nicolson method of finite differencing and the …
Manual Of Erosion Control Principles And Practices, Calvin G. Clyde, C. Earl Israelsen, Paul E. Packer, Eugene E. Farmer, Joel E. Fletcher, Eugene K. Israelsen, Frank W. Haws, N. V. Rao, Jay Hansen
Manual Of Erosion Control Principles And Practices, Calvin G. Clyde, C. Earl Israelsen, Paul E. Packer, Eugene E. Farmer, Joel E. Fletcher, Eugene K. Israelsen, Frank W. Haws, N. V. Rao, Jay Hansen
Reports
No abstract provided.
Salinity Management Options For The Colorado River. Damage Estimates And Control Program Impacts, F. Bruce Brown, Joel R. Cannon, Ralph C. D'Arge, Larry Eubanks, W. T. Franklin, Charles W. Howe, Ernest B. Jackson, K. L. Leathers, Frank E. Robinson, Don Snyder, Jeffrey T. Young, Robert A. Young
Salinity Management Options For The Colorado River. Damage Estimates And Control Program Impacts, F. Bruce Brown, Joel R. Cannon, Ralph C. D'Arge, Larry Eubanks, W. T. Franklin, Charles W. Howe, Ernest B. Jackson, K. L. Leathers, Frank E. Robinson, Don Snyder, Jeffrey T. Young, Robert A. Young
Reports
Rivers draining arid basins increase in salinity content in the downstream area to the point where water users are often significantly damaged. The problem in some cases can be ameliorated by altering upstream water and land use practices. An economic trade off exists between the cost of such upstream efforts and the downstream benefits achieved. This report examines options for salinity management in the Colorado River Basin. The study sought to provide additional information to estimate 1) economic damages caused by various salt concentrations to agricultural and municipal water users and 2) economic costs of salinity control measures by upstream …
Mathematical Modeling Of A Sociological And Hydrologic Decision System, Wade H. Andrews, J. Paul Riley, Malcolm B. Masteller
Mathematical Modeling Of A Sociological And Hydrologic Decision System, Wade H. Andrews, J. Paul Riley, Malcolm B. Masteller
Reports
The general goal of this study was to develop a functional model of the sociological and related hydrologic elements in flood control decision-making. Conceptual system models were developed for the hydrologic system and for the sociological system. The sociological variables were identified as they related to the steps in the process of the model. Following the conceptual decision process model the social elements of the model were calibrated from data obtained from field studies and mathematical equations were developed and tested. Finally simulations of the process were run. After adjustments were made the model was found to function. Several methodological …
Evaluation Of The Long Term Effects Of Irrigation With Wastewater, James H. Reynolds, M. O. Braun, W. F. Campbell, R. W. Miller, L. R. Anderson
Evaluation Of The Long Term Effects Of Irrigation With Wastewater, James H. Reynolds, M. O. Braun, W. F. Campbell, R. W. Miller, L. R. Anderson
Reports
Introduction: Background: The application of municipal wastewater to the land or using the soil mantle as a wastewater treatment system has been practiced for many years. The history of land application dates back to ancient Athens. Sewage farming or the transportation of wastewater to rural areas for irrigation and disposal was practiced in Eurpose as early as 1559. The practice became fairly widespread in England, France, Germany, Poland, Austria, and the United States during the late 1800's [
Feasibility Of Accelerating Construction Of The Central Utah Project, Trevor C. Hughes, L. Douglas James, Frank Haws, C. Earl Israelsen
Feasibility Of Accelerating Construction Of The Central Utah Project, Trevor C. Hughes, L. Douglas James, Frank Haws, C. Earl Israelsen
Reports
Introduction: Objective: In April, 1977 the President's statement on water projects recommended that a number of federal water development projects, including the Conneville unit of the Central Utah Project, not be completed. The ensuing efforts of project supporters brought about a review of the projected costs, benefits, and other political, social and environmental factors and consequently, the current issue is not whether or not the project should be constructed. Rather, the objective of this report is to examine the following question: Given the fact that at least the 5 units of the CUP which have already been authorized will eventually …
The Impact Of Energy Resource Development Of Water Resource Allocations, John E. Keith, K. S. Turna, Sumol Padunchai, Rangesan Narayanan
The Impact Of Energy Resource Development Of Water Resource Allocations, John E. Keith, K. S. Turna, Sumol Padunchai, Rangesan Narayanan
Reports
This research used a linear programming model of the agricultural and energy sectors of Utah to examine the economically efficient allocation of water between agriculture and energy. Data were collected for agricultural returns, costs, and water requirements; energy returns, costs, and water requirements; and water supply costs. Results indicate that if large scale energy development occurs in the Colorado River Basin in Utah, most of irrigated agriculture will be eliminated, given Utah’s consumptive use constraint under the Upper Colorado Rive Compact. On the other hand, for two more “probable” levels of energy development, including the Energy Research and Development Administration’s …
Utah's 1977 Drought, Trevor C. Hughes, Clark Bigler, Jerry Olds, Richard Griffin, Arlo Richardson, L. Douglas James, Norris Stenquist, James Harvey
Utah's 1977 Drought, Trevor C. Hughes, Clark Bigler, Jerry Olds, Richard Griffin, Arlo Richardson, L. Douglas James, Norris Stenquist, James Harvey
Reports
The Utah Drought of 1976-1977 has been characterized as the wettest drought in history. It was produced by the driest winter season of record followed by summer rains which were much wetter than normal in many regions of the state. Stream-flow is highly correlated with winter rather than summer precipitation and therefore the most severe impacts of the drought were related to the record low stream-flow during 1977 plus the ski industry impacts which were directly related to 1976-1977 snowfall. Drought impacts upon several sectors of the economy plus the extensive responses of all levels of government in the form …
Vulnerability Of Water Supply Systems To Drought, D. T. Jensen
Vulnerability Of Water Supply Systems To Drought, D. T. Jensen
Reports
The objective of this study is to develop a relatively simple and practical method for improving the availability and reliability of information about droughts to those responsibile for water supply management and planning. The information technique developed provides an objective basis for the selection of wate rsupply management alternatives during periods of drought. The derived drought information can assist water supply planners and managers in identifying priorities among proposed water supply developments fron consideration of water supply vulnerability and exisitng drought severity levels. Two drought indices are developed to achieve the overall objective of the study: (1) the drought severity …