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Articles 7591 - 7620 of 8090
Full-Text Articles in Physical Sciences and Mathematics
Urban Storm Runoff Inlet Hydrograph Study Volume 3: Hydrologic Data For Two Urban Highway Watersheds In The Salt Lake City Area, Utah, Joel E. Fletcher, Cheng-Lung Chen
Urban Storm Runoff Inlet Hydrograph Study Volume 3: Hydrologic Data For Two Urban Highway Watersheds In The Salt Lake City Area, Utah, Joel E. Fletcher, Cheng-Lung Chen
Reports
The main objective of this study is to develop an accurate design method for computing inlet hydrographs of surface runoff, with average recurrence intervals of 10, 25, and 50 years, from typical urban highway by flood routing technique. Hydrologic data such as the rainfall intensity, runoff flow rate, air temperature, wind velocity, and soil moisture content were collected during rainfall seasons in 1972 and 1973 on two urban highway watersheds in the Salt Lake City area, Utah. These data were used in the verification of a mathematical model simulating the surface runoff from such highway watersheds. The difficulties and inherent …
The Natural Salinity Of The Colorado River, Stewart J. Williams
The Natural Salinity Of The Colorado River, Stewart J. Williams
Reports
No abstract provided.
Impacts Of Energy Development On Utah Water Resources, Barry C. Saunders
Impacts Of Energy Development On Utah Water Resources, Barry C. Saunders
Reports
Introduction: Choosing a theme for a conference especially one for a group of diverse disciplines such as the American Water Resources Association encompasses, is always a challenge. you find yourself torn between thigns you'd really like to talk and hear about, and topics you think will draw attendance. It was most fortunate when somebody came up with the idea of Water for Energy, becasue to my way of thinking, it met both of these ends. There is no denying that starting in late 1973, energy has been the catchword, and the energy crisis has been the bandwagon to leap upon. …
Development Of A Management Framework Of The Great Salt Lake, J. Paul Riley, Calvin G. Clyde, William J. Grenney, Yacov Y. Haimes, Craig T. Jones
Development Of A Management Framework Of The Great Salt Lake, J. Paul Riley, Calvin G. Clyde, William J. Grenney, Yacov Y. Haimes, Craig T. Jones
Reports
No abstract provided.
Shoreline Situation Report City Of Hampton, Virginia, Carl H. Hobbs Iii, Gary L. Anderson, Robert J. Byrne, John M. Zeigler
Shoreline Situation Report City Of Hampton, Virginia, Carl H. Hobbs Iii, Gary L. Anderson, Robert J. Byrne, John M. Zeigler
Reports
No abstract provided.
Removal Of Phosphorus From Static Sewage Effluent By Waterhyacinth, W Harold Ornes
Removal Of Phosphorus From Static Sewage Effluent By Waterhyacinth, W Harold Ornes
W. Harold Ornes
Waterhyacinth [Eichhornia crassipes (Mart.) Solms] was grown in static sewage effluent during May to July 1974 in outdoor concrete containers with a capacity of 760 liters and a surface area of 1.66 m². The plants were removed weekly from one-half of the surface area of the containers during 5-wk growth periods. Tissue phosphorus (P) and nitrogen (N), plant productivity, and some parameters of water quality were measured. A maximum uptake of 5,500 µg of P/g dry weight of plant material occurred when the level of orthophosphate phosphorus (available P) in the effluent was 1.1 µg/ml. Phosphorus in the effluent was …
Hydraulic And Flow Studies Related To Sediment Transport, Kentucky River, Kentucky, Bruce R. Moore, Michael R. Short, Thomas Wachs
Hydraulic And Flow Studies Related To Sediment Transport, Kentucky River, Kentucky, Bruce R. Moore, Michael R. Short, Thomas Wachs
KWRRI Research Reports
This study related the conditions of flow and channel shape to distribution of sediment types in the Kentucky River. Seven distinct types of sediment association were delineated and these have a regular pattern of distribution influenced by the presence of navigation locks and dams. The most suitable locations for commercial extraction of bed material were clearly indicated and the variations of sand size delineated by the study. The irregular discharge pattern of the stream indicates potential problems in the disposal of solid waste pollutants.
A remeasurement of the dredge hole in the Ohio River indicated a continuation of the same …
Development And Preliminary Application Of Mathematical Models To The Weber Basin, W. J. Grenney, D. S. Bowles, M. D. Chambers, J. P. Riley
Development And Preliminary Application Of Mathematical Models To The Weber Basin, W. J. Grenney, D. S. Bowles, M. D. Chambers, J. P. Riley
Reports
The adoption of stream standards, whether for direct application or for the establishment of realistic effluent standards, creates a need to predict the impact of pollution loads on river water quality during critical flow periods or as the result of future user demands. Because of the complexity of aquatic systems, mathematical models are an excellent medium for bringing together the state-of-the-art knowledge from a variety of disciplines into a form which can be readily applied to practical problems. Applying a mathematical model to a river system has the added advantage of providing a structure for the systematic consideration of the …
Multiple Uses Of Utah Irrigation Canals: Cache County As A Case Study, James J. Kennedy, Komain Unhanand
Multiple Uses Of Utah Irrigation Canals: Cache County As A Case Study, James J. Kennedy, Komain Unhanand
Reports
Irrigation use is an obvious benefit of Utah canals that has been recognized for over 100 years. This study attempts to illustrate other, less obvious, uses. the major use examined was recreational, but canals are presently functioning as storm drainage systems and have potential for diverting flood crests in many river systems.
Recreational use of canals falls into two categories. There is passive use such as its landscape values, affects on creating shade and bird-wildlife habitat, etc., that is difficult to quantify but no less important than active canal use such as tubing, hiking, bank-play, bicycling, etc. We selected several …
Water Current, Volume 6, No. 11, November 1974
Water Current, Volume 6, No. 11, November 1974
Water Current Newsletter
Guest Editorial: Earl R. Kendle, Chief, Research Division, Nebraska Game and Parks Commission
Deadline for Research Proposals
NWRRI Hires Research Associate
Underground Water Supplies Remain the Same
Greater Priority Urged for Platte Level B Study
Coming Crisis -- Water Shortage?
EPA Orders Study of Nation's Drinking Water
Water Resources Council to Conduct Project Cost Sharing Study
Corps of Engineers Reviewing Project Deauthorization
Methods for Cleaner Irrigation Runoff
Water Proponents Defend Water Resource Spending
Expo '74 "Tote Board" or Resource Use
ERTS Can Locate Energy Resources and Protect Environment
Research Review: Water Quality Study of Runoff from Agricultural Lands
Water Current, Volume 6, No. 10, October 1974
Water Current, Volume 6, No. 10, October 1974
Water Current Newsletter
From the Desk of the Director
Thanks Don for a Job Well Done
Deadline for Research Proposals
NWRRI Hosts Research in Action Conference
Learn About Nebraska's Water Quality
NWRRI Advisory Committee Meets
Director Lectures at Maine
Hydrologist Position Available
Forestry Chairman Sought
Wise Water Use Advocated
MRBC Director Sees Adequate Water for Planned Development
MRBC Committee on Energy and Environment
Energy Research and Development Adminstration Established
EPA Reports on Future Wastewater Treatment Plant Needs
New Criteria for EPA Grants
"Second America" Needs Discussed by USGS
Research Review: Disposal of Cattle Feedlot Runoff on Agricultural Land
Water Current, Volume 6, No. 9, September 1974
Water Current, Volume 6, No. 9, September 1974
Water Current Newsletter
From the Desk of the Director
Deadlines for Research Proposals
NWRRI Hosts Research in Action Conference
Opening: River Basin Planner
Hal Schroeder Speaks at ICE/WRC Conference
$1.6 Billion for Nebraska Sewage Needs
FY 1975 Title II Projects Announced
Discount Rate for Water Resources Projects Increases
Water Gun: Toy or Tool?
EPA Administrator Comments on Chlorine
Completed Water Projects Ignored
Senator Defends Current Water Policies
Rail-Barge System May Join Hands
Urban Water Pollution
New General Counsel of WRC
Research Review: Recharge Simulation Model
Sodium, Potassium, Calcium And Magnesium Content Of Northwest Arkansas Rain Water In 1973 And Trace Metal Analyses Of 1974 Rains, G. H. Wagner, R. W. Holloway
Sodium, Potassium, Calcium And Magnesium Content Of Northwest Arkansas Rain Water In 1973 And Trace Metal Analyses Of 1974 Rains, G. H. Wagner, R. W. Holloway
Technical Reports
No abstract provided.
Metabolic Capabilities Of Sulfur Oxidizing Bacteria And Their Role In Water Pollution, M. I. H. Aleem
Metabolic Capabilities Of Sulfur Oxidizing Bacteria And Their Role In Water Pollution, M. I. H. Aleem
KWRRI Research Reports
This report describes investigations into the physiology of microorganisms that are commonly involved in the oxidation of inorganic sulfur compounds. The metabolic activities of these bacteria play a potent role in several fields of economic importance such as strip mining operations, water pollution, corrosion, metallurgy, petroleum technology and soil fertility processes.
The oxidation of inorganic sulfur compounds was studied in the chemolithotrophs Thiobacillus denitrificans, Thiobacillus A2, Thiobacillus neapolitanus, and a photolithotroph Rhodopseudomonas palustris. Cell suspensions from all of the thiobacilli catalyzed completely the oxidation of sulfide, thiosulfate, and sulfite to sulfate. The oxidation of thiosulfate in R. palustris …
Powers Of The State Of Kentucky In Implementing An Effluent Tax As A Part Of An Interstate Ohio River Basin Water Pollution Control Program, Anita L. Morse, Edward Zeigler
Powers Of The State Of Kentucky In Implementing An Effluent Tax As A Part Of An Interstate Ohio River Basin Water Pollution Control Program, Anita L. Morse, Edward Zeigler
KWRRI Research Reports
This report is intended to set forth some of the problems and solutions involved in financing and regulating water quality control. The purpose is to record some of the major problems confronting those who legislate water quality, those who espouse technological answers, and those who see the problem in terms of economic solutions. The limits placed by political and institutional constraints on solutions to these problems are frequently not understandable.
Within this report are contained separate investigations: a study of federal-interstate relations and the interstate compact; a study of Kentucky's common law approach to water rights; a study of financing …
Water Current, Volume 6, No. 8, August 1974
Water Current, Volume 6, No. 8, August 1974
Water Current Newsletter
Guest Editorial: Mandatory versus Voluntary, Dayle Williamson, Executive Secretary, Nebraska Natural Resources Commission
Deadlines for Research Projects
NWRRI Hosts Research in Action Conference
DEC Director Named
Nebraska Receives Discharge Elimination Report
Sewage Treatment Plant in Lincoln
Nebraska Drought
South Dakota Seeks Additional Missouri River Benefits
Main-Stem Water Marketing
OWRR Reorganized
ERTS Begins Third Year in Orbit
Sirotherm - An Australian Development for Purifying Water
Purpose, Policy and Objectives
Research Review: Alternatives in Area Management of Groundwater
Build-Up Of Mineral Content In Lake Dardanelle And The Effect On Zooplankton, Tom N. Palko
Build-Up Of Mineral Content In Lake Dardanelle And The Effect On Zooplankton, Tom N. Palko
Technical Reports
No abstract provided.
Analysis Of Unsteady Flow Toward Artesian Wells By Three-Dimensional Finite Elements, Yang H. Huang, Shen-Jyh Wu
Analysis Of Unsteady Flow Toward Artesian Wells By Three-Dimensional Finite Elements, Yang H. Huang, Shen-Jyh Wu
KWRRI Research Reports
A three-dimensional finite element computer program was developed for analyzing unsteady flow toward artesian wells. The program is designed especially for determining the drawdown around an artesian well penetrating fully or partially a nonhomogeneous and anisotropic aquifer of irregular shape and cross section. It can also be used as a general program for aquifer simulation and evaluation. A major advantage of the program lies in the minimum amount of input data required. By assuming the top and bottom boundaries of the aquifer as two arbitrary planes, the aquifer will be divided into six- or eight-node elements, and their nodal coordinates …
Water Current, Volume 6, No. 7, July 1974
Water Current, Volume 6, No. 7, July 1974
Water Current Newsletter
Guest Editorial: Hal L. Schroeder, Chairman, Water Resources Research Institute Advisory Committee
Deadlines for Research Proposals
Research Contracts from Old West Commission
State Reclamation Projects Funded
Water Management Needed in Nebraska
DEC Issues Power Plant Permit
Rann Proposal Guidelines Available
Water Resources Information Program
Principles and Standards - Procedure #1
New Energy Developments Will Use More Water
Research Review: A Regional Model for Predicting Great Plains Evapotranspiration
Water Salvage Potentials In Utah, Volume I. Open Water Evaporation And Monolayer Suppression Potential, Trevor C. Hughes, E. Arlo Richardson, James A. Franckiewicz
Water Salvage Potentials In Utah, Volume I. Open Water Evaporation And Monolayer Suppression Potential, Trevor C. Hughes, E. Arlo Richardson, James A. Franckiewicz
Reports
An estimate of the potential in Utah for evaporation suppression by the monolayer film method is presented. The model estimates evaporation suppression as a function of wind speed, a four parameter exposure factor, and reservoir size. The estimated suppression factors vary from 0 to 30 percent and average 11 percent of the statewide total annual evaporation. Estimates of May to October evaporation and suppression potential are calculated for each of the 227 impoundments in the surface water inventory. A forthcoming report in this series will examine the potential for evaporation suppression by thermal destratification. This procedure, which is already being …
Water Current, Volume 6, No. 6, June 1974
Water Current, Volume 6, No. 6, June 1974
Water Current Newsletter
From the Desk of the Director
1974 Summer Institute
Deadlines for Research Proposals
Support Available for PhD Candidates
EPA and Feedlot Industries
EPA--No Exception
Fire on Asbestos
Solar Hot Water Heater Available
Cancer from Drinking Water
1975 Autos May Be Health Hazards
Soil Acts as Neutralizer
Jack C. Jorgensen Appointed Associate Director of OWRR
New State Institute Directors
Research Review: Improved Water and Fertility Management in Irrigation Systems
Water Current, Volume 6, No. 5, May 1974
Water Current, Volume 6, No. 5, May 1974
Water Current Newsletter
From the Desk of the Director
1974 Summer Institute
Dr. Peter Huntoon to Wyoming
Deadlines for Research Proposals
Two Matching Grants Funded
OWRR Scientist to Visit Nebraska
Nebraska's Research Needs
Water Permit Program Changes Hands
MRBC Announces Planning Goals and Objectives
Barbarossa Named MRBC Director of Planning
Nation's Water Quality - Getting Better or Worse?
Water Resources Development Act Signed
OSW Funds Cut (Again!)
EPA and WPCF to Recommend Changes to PL 92-500
More Flexibility for Effluent Guidelines
Research Review: Biological Control of "Sphaerotilus natans" and Other Related Species in Waste Waters
Water Current, Volume 6, No. 4, April 1974
Water Current, Volume 6, No. 4, April 1974
Water Current Newsletter
From the Desk of the Director
1974 Summer Institute
National Commission on Water Quality Announces Study Plans
Maximum Water Resources Development Urged
Department for Natural Resources Nixed in Favor of Short-Term Measures
Controversy Reigns Over Project Discount Rate
EDF Questions Flood Control Projects
Research Review: Practical Treatment of Feedlot Runoff
Distribution Of Trace Metals In A Warm Water Release Impoundment, J. Nix
Distribution Of Trace Metals In A Warm Water Release Impoundment, J. Nix
Technical Reports
A water quality study of the DeGray Reservoir, Arkansas, was conducted beginning immediately following the beginning of impoundment through the first year in which the reservoir was operated near normal pool elevation. DeGray Reservoir is the first major dam in Arkansas to be equipped with upper level release capabilities. Temperature, dissolved oxygen, and turbidity were measured in situ at stations located over the old river channel. Samples were taken from selected levels within the water column at each station and analyzed for the following parameters: pH, sodium, potassium, calcium, magnesium, nitrate, phosphate, sulfate, chloride, fluoride, alkalinity, COD, iron, manganese, copper, …
Finitely Generated Modules Over Bezout Ringsrwiegand@Unl.Edu, Roger Wiegand, Sylvia Wiegand
Finitely Generated Modules Over Bezout Ringsrwiegand@Unl.Edu, Roger Wiegand, Sylvia Wiegand
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
Let R be a Bezout ring (a commutative ring in which all finitely generated ideals are principal), and let M be a finitely generated R -module. We will study questions of the following sort: (A) If every localization of M can be generated by n elements, can M itself be generated by n elements? (B) If M 0 R m = Rn for some m, n, is Af necessarily free? (C) If every localization of M has an element with zero annihilator, does M itself have such an element? We will answer these and related questions for various familiar classes …
Water Current, Volume 6, No. 3, March 1974
Water Current, Volume 6, No. 3, March 1974
Water Current Newsletter
From the Desk of the Director
Water Resources Seminar Series
1974 Summer Institute
Administration Water Budget - FY 1975
Bureau of Reclamation
Office of Water Resources Research
Office of Saline Water
Water Resources Council
Commisson on Water Quality
US Geological Survey
Stream Channelization Critiicized
Investments in Transportation
Cloud Seeding Impacts Researched
$7 Billion Proposed for Environmental Programs
WRC Issues New Guidelines
Research Review: Biological Control of Blue-Green Algae
Seasonal Changes In Water Quality And Primary Productivity In Doe Valley Lake, Edmond J. Bacon, Stuart E. Neff
Seasonal Changes In Water Quality And Primary Productivity In Doe Valley Lake, Edmond J. Bacon, Stuart E. Neff
KWRRI Research Reports
Primary productivity and water quality were studied in Doe Valley Lake, a 147-hectare impoundment on Doe Run, a spring-fed stream in Meade County, Kentucky, from 13 June 1969 to 31 July 1972. Doe Valley Lake is monomictic during most winter seasons, but it is dimictic during more severe winters because of its morphometry and location on the borderline climatic region for dimictic lakes (37° N latitude). Oxygen depletion in the hypolimnion is severe, and anaerobic conditions usually prevail by late June. A hypolimnetic areal deficit of 0.038 mg/cm2/day was calculated. Supersaturation of oxygen in the epilimnion was common, …
Water Resources News, Volume 6, No. 2, February 1974
Water Resources News, Volume 6, No. 2, February 1974
Water Current Newsletter
From the Desk of the Director
1974 Summer Institute
NWRRI Research Seminar
Water Resources Seminar Series
Future Water Use - Coal vs. Irrigation
Yellowstone River Basin Study Proposed
EPA Increases Tuition Fees
Changing Attitudes in the Corps
Social Effects of Public Works Projects
Water Programs Reorganized, Replaced and Removed
WRC's 6-7/8% Rate May Be Reduced
Cost Sharing Receives a Back Seat
Research Review: Digital Simulation of Conjunctive-Use Irrigation in Dawson County, Nebraska
Development Of Prediction Relationships For Water Requirements With Irrigation Cooling, Billy J. Barfield, John N. Walker, F. A. Payne
Development Of Prediction Relationships For Water Requirements With Irrigation Cooling, Billy J. Barfield, John N. Walker, F. A. Payne
KWRRI Research Reports
A model for predicting leaf temperatures during an off-on mist cycle is presented. The model uses a combination of energy budget and aerodynamic techniques. The model was tested for dry leaf temperature and evapotranspiration predictions using average hourly data from Arizona. The accuracy was good. It was also tested for dry leaf temperature predictions using two to three minute data with a widely varying net radiation. When reasonable values of stomatal resistance were used, the agreement was again good.
The model was tested for prediction of wet leaf temperature prediction with a ten minute on, fifty minute off mist irrigation …
Water Resources News, Volume 6, No. 1, January 1974
Water Resources News, Volume 6, No. 1, January 1974
Water Current Newsletter
From the Desk of the Director
1974 Summer Institute
Water Resources Seminar Series
Energy Conference Proceedings Available
Feedlots Pollute Western Water
Geothermal Energy Dangerous
Water Funds on Ice
Insurance Sales Up But Not Final
REAP Funds May Freeze
River Moratorium Continued
Do-It-Yourself Dam Plan Approved
Environment and Energy Headed in Same Direction
Pavement with Ready-Made Holes
Research Review: Biophysical Control of Water Loss