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Articles 50941 - 50970 of 52385
Full-Text Articles in Physical Sciences and Mathematics
Groundwater - Surface Water Integration Study In The Grand Prairie Of Arkansas, Carl L. Griffis
Groundwater - Surface Water Integration Study In The Grand Prairie Of Arkansas, Carl L. Griffis
Technical Reports
A mathematical model of the Quaternary Aquifer of the Grand Prairie, Arkansas was developed and used to evaluate a variety of methods of artificially recharging this aquifer. In addition, the model was used to evaluate the impact of various levels of water management and the probable movement of artificially recharged water in the aquifer. Improved water management and the use of recharge wells were the two alternatives that showed the most promise as potential solutions. The rate of movement of recharged water was determined by the model to be 300 ft./year under a gradient of 16 ft./mile.
Characterization Of Water Movement Into And Through Soils During And Immediately After Rainstorms, C. T. Haan
Characterization Of Water Movement Into And Through Soils During And Immediately After Rainstorms, C. T. Haan
KWRRI Research Reports
The movement of water into and through soils in the unsaturated state is basic to many water resources problems including rainfall-runoff models, ground water recharge, irrigation, drainage, evapotranspiration and the movement of pollutants in soils. This study was conducted in an effort to determine if the flow equation based on Darcy's Law and the continuity equation could be used to describe watershed infiltration and thus be incorporated into hydrologic models.
The results of the study indicate that even on apparently uniform soils there is a great deal of variability in soil water properties. Handling this variability plus the difficulty of …
Water Resources News, Volume 4, No. 9, November 1972
Water Resources News, Volume 4, No. 9, November 1972
Water Current Newsletter
Conference Proceedings Available
Assistance Grants for Nebraska
Niobrara, Nebraska - Moving
Congress Heaps CEQ Report
Bureau Studies Saline Water
New Administrative Regions for USGS
Unfair Attacks on Pesticide Pollution
Numerical Designation of Bureau Regional Offices Obsolete
Water Pollution Control Measure Becomes Law
Gavins Point Dam
Water Dollars Down the Drain
Federal Pollution Laws
New Food Industry Uses Heated Water
War Between the Worlds
Waste Discharge Exceptions Banned
National Water Commission Report
Water Resources News, Volume 4, No. 8, October 1972
Water Resources News, Volume 4, No. 8, October 1972
Water Current Newsletter
Updated Version of Proposed Regulations Now Available
EPA Issues New Application Form for Submission of Grant Proposals
Reclamation and Reuse of Solids and Wastes
Fall Meeting of Nebraska Section of AWRA
Technology Transfer Conference
OWRR Director Resigns
Requested Delay in Big Blue Plan
Missouri River Waterfront
Missouri River Basin Commission Notes
Missouri River Money Hurdle
Fish Tale
Water Pollution Veto Overturned
OWRR Priorities for Fiscal 1974
D.O. And Other Tests, Walter A. Lawrance
Mill Pollution, Walter A. Lawrance
Press Reports, Walter A. Lawrance
Pool Studies, Walter A. Lawrance
Computer Sheets, Walter A. Lawrance
Special Reports, Walter A. Lawrance
L.A. General Data, Walter A. Lawrance
A Gastric Battery For Fish, Earl R. Kendle, Larry A. Morris
A Gastric Battery For Fish, Earl R. Kendle, Larry A. Morris
Nebraska Game and Parks Commission: Staff Research Publications
We previously described, in Transactions of the American Fisheries Society (1965), vol. 94, p. 193-194 “A device for holding objects in the stomachs of fish," consisting of a 1/16-inch plastic rod formed to loop around the isthmus and extend down the gullet into the stomach. This harness was developed to secure an experimental gastric battery, not reported at that time. The battery was intended to power an ultrasonic tracking transmitter.
After 20-day trials of seven combinations of metals in an electrolytic solution of 0.5 percent hydrochloric acid, we chose gold and cadmium for the battery plates on the basis of …
Development And Testing Of A Double-Beam Absorption Spectrograph For The Simultaneous Determination Of Different Cations In Water, William H. Dennen
Development And Testing Of A Double-Beam Absorption Spectrograph For The Simultaneous Determination Of Different Cations In Water, William H. Dennen
KWRRI Research Reports
Construction and testing of a double-beam absorption spectrographic analysis system using a d. c. arc multielement source has been conducted. An optical system design which brings analytical and reference beams together to illuminate the upper and lower portions of the spectrograph slit has been shown to be functional. However, ad. c. arc will not serve as a multielement source for the intended purposes because of excessive thermal broadening of emission lines.
A direct excitation d. c. arc method was reviewed which can be used for the rapid determination of some cations in water.
Phytoplankton Successions And Lake Dynamics In Las Vegas Bay, Lake Mead, Nevada, Ervon R. Koening, Richard W. Tew, James E. Deacon
Phytoplankton Successions And Lake Dynamics In Las Vegas Bay, Lake Mead, Nevada, Ervon R. Koening, Richard W. Tew, James E. Deacon
Publications (WR)
Phytoplankton successions, applications of the general growth equation, and physical measurements have been employed to investigate events occurring at the interface between industrial and sewage effluent contained in Las Vegas Wash and the waters of Lake Mead, Nevada. The data indicate that the entering waters tend to form a density current interrupted at intervals by dynamic effects generated in the lake. The dynamic relationships described here for the spring months suggest that a much more thorough understanding of physical, chemical and biological interactions is necessary to permit solution of the numerous problems of Las Vegas Bay discussed or alluded to …
Water Resources News, Volume 4, No. 7, September 1972
Water Resources News, Volume 4, No. 7, September 1972
Water Current Newsletter
North Loup Project Approved
NWC Endorses Cost-Sharing for All Federal Water Resource Projects
Tuition for Training Courses Imposed by EPA
Water Problems Emphasized by EPA
Environmental Protection Agreement Signed by US-USSR
Hazards Linked with Large-Scale Water Developments
NWC Recommends Enactment of Waterway User Charges
Refuse for Recreational Grounds
Water Development and Population Dispersal
Engineering Short Course
Rare Breed of Fish May Get Dam For Home
World Record Flow Measured on Amazon
Dam Inspection Bill Signed by President
Flood Insurance
Characteristics of Water Resources Research Centers
Drinking Water Legislation
A Preliminary Bibliography And Lake Index Of The Inland Mineral Waters Of The World, D. B. Mccarraher
A Preliminary Bibliography And Lake Index Of The Inland Mineral Waters Of The World, D. B. Mccarraher
Nebraska Game and Parks Commission: Staff Research Publications
This preliminary- bibliography and lake index has been prepared by the author on the basis of information available in the Office of Limnology, Hastings College, Nebraska. Although all source material available there has been searched, it is recognized that many papers, especially those published in regional languages may have been left out. Readers are requested to point out such omissions and any inaccuracies that require correction.
This preliminary bibliography will be circulated among specialists in the subject for corrections to the citations and for suggested additions to the list. It is planned that the paper will then be revised to …
The Relation Between Soil Characteristics, Water Movement And Nitrate Contamination Of Ground Water, Grant W. Thomas, Matthew Mcmahon
The Relation Between Soil Characteristics, Water Movement And Nitrate Contamination Of Ground Water, Grant W. Thomas, Matthew Mcmahon
KWRRI Research Reports
Soils from several areas in Kentucky were placed in columns and leached with Ca(NO3)2. Subsoils high in iron oxide were found to retard the leaching of nitrate very significantly. In other soils, the nitrate moved through as fast as or slightly faster than the water.
Field application of nitrogen to corn was most efficient when done in the spring or summer near the time that the corn takes it up. The one exception to this was a red soil, where fall application of nitrogen resulted in little loss due to the retarding effect mentioned in the …
A Mathmatical Model Of Primary Productivity And Limnological Patterns In Lake Mead, Lorne G. Everett
A Mathmatical Model Of Primary Productivity And Limnological Patterns In Lake Mead, Lorne G. Everett
Publications (WR)
The temporal and spatial changes in chemical and biological properties of Lake Mead have been investigated, thereby indicating the sources of water pollution and the time of highest pollution potential. Planktonic organisms have been shown to indicate the presence of water problems. Macro- and micro-nutrient analyses have shown that primary productivity is not inhibited by limiting concentrations. A mathematical model has been developed, tested with one set of independent data, and shown worthy of management utility. Although the model works very well for the Lake Mead area, the physical reality of the Multiple Linear Regression equation should be tested on …
Location Of Solution Channels And Sinkholes At Dam Sites And Backwater Areas By Seismic Methods: Part Ii, Vincent P. Drnevich, D. Raghu
Location Of Solution Channels And Sinkholes At Dam Sites And Backwater Areas By Seismic Methods: Part Ii, Vincent P. Drnevich, D. Raghu
KWRRI Research Reports
Four seismic field methods and a laboratory method are used to determine shear wave propagation velocities and shear moduli for two sites. The four seismic methods are: standard seismic refraction survey, down hole shooting refraction survey, transient Rayleigh wave survey, and crosshole shooting survey. A torsional resonant column apparatus was used for the laboratory tests. The cross hole shooting method gave the best results because direct measurements were made. Criteria for using this method are given. Methods which measure compression wave velocity give inconsistent results because the conversion to shear wave velocity is very sensitive to Poisson's ratio. Laboratory tests …
Location Of Solution Channels And Sinkholes At Dam Sites And Backwater Areas By Seismic Methods: Part I, Vincent P. Drnevich, S. R. Smith, E. P. Cleveland
Location Of Solution Channels And Sinkholes At Dam Sites And Backwater Areas By Seismic Methods: Part I, Vincent P. Drnevich, S. R. Smith, E. P. Cleveland
KWRRI Research Reports
The basic concepts associated with the sledge hammer seismic refraction survey are reviewed and a modified version called down hole shooting is discussed. The latter method has distinct advantages for rock surface profiling. These include: calibration at the end points of the survey, measurement of vertical wave propagation velocities directly, and having a refracted wave ray path for almost the entire survey length.
The down hole shooting seismic refraction survey has been simulated with the digital computer. The method can handle any shaped rock surface profile and generates corresponding travel time curves for the forward and reverse profile surveys. This …
Water Resources News, Volume 4, No. 6, Summer 1972
Water Resources News, Volume 4, No. 6, Summer 1972
Water Current Newsletter
OWRR Issues Bibliography Series
Water Problems Emphasized More by EPA
Irrigation with Feedlot Effluent Studies by ARS
Industry Largest Water User in US
Satellite Launch Open Study
Colorado River Salinity Costs to be Studied
House Approves $150,000 Appropriations to Study of Cross-Florida Barge Canal
EPA Banned DDT
USBR Announces Water Resources Thesaurus
Estimates of Nation's Energy Resources Made by USGS
Hydraulic And Sediment Transport Studies In Relation To River Sediment Control And Solid Waste Pollution And Economic Use Of The By-Products, Bruce R. Moore, Michael R. Short
Hydraulic And Sediment Transport Studies In Relation To River Sediment Control And Solid Waste Pollution And Economic Use Of The By-Products, Bruce R. Moore, Michael R. Short
KWRRI Research Reports
The distribution of sediments and conditions of transport were studied in the Kentucky, Big Sandy and Ohio Rivers. The sand and coal were in transport at different flow velocities for the rivers and the deposition of these sediments was a direct function of the flow conditions at a particular locality.
The flow conditions of transport of the sediments were studied in flumes as were the hydraulic conditions in model dredge holes to determine the feasibility of trapping sediment. The conditions of scour and fill were also established and compared with known conditions in a dredge hole in the Ohio River. …
Impact Of A Proposed Reservoir On Local Land Values, Philip Drucker, Charles R. Smith, Allen C. Turner
Impact Of A Proposed Reservoir On Local Land Values, Philip Drucker, Charles R. Smith, Allen C. Turner
KWRRI Research Reports
This project was designed to study the impact of private preconstruction land acquisition in a Central Kentucky area in which a flood-control dam and reservoir impoundment is planned. The research design was built around use of anthropological concepts and research techniques. By these means it was possible to analyze the perceived values of land to traditionalist residents, among which social and economic security concepts are paramount. Recent land purchases, locally believed to have been made chiefly by "outsiders," (urbanites from nearby Louisville), at prices out of line in terms of local agricultural worth, has been extremely unsettling contributing to the …
Environmental Status Report - January, February, March/April, May, June 1972, Florida Power Corporation
Environmental Status Report - January, February, March/April, May, June 1972, Florida Power Corporation
Reports
The publication of this issue of the Environmental Status Report incorporates the environmental activities of Florida Power Corporation from January to June, 1972_ As with the last Report, a six-month period is included, rather than two separate quarters, due to a scarcity of time_ It is hoped that the next issue will find the Report back on a Quarterly schedule_ The following is a summarization of the Company's supporting and associated activities from January 1, 1972 to June 30, 1972_ This work has been contributed to by many in the Company, and has been coordinated as a principal responsibility of …
Lipotes Vexillifer , Robert L. Brownell Jr., Earl S. Herald
Lipotes Vexillifer , Robert L. Brownell Jr., Earl S. Herald
United States Department of Commerce: Staff Publications
Order Cetacea, Family Platanistidae, Subfamily Iniinae. The genus Lipotes now includes one species Lipotes vexillifer as treated below. No sub- species are recognized.
The Prairie Naturalist Volume 4, No. 2. June 1972
The Prairie Naturalist Volume 4, No. 2. June 1972
The Prairie Naturalist
EDITORIAL: Coordination: A Step for Environmental Protection ▪ Paul B. Kannowski
AN ANALYSIS OF BARN OWL AND GREAT HORNED OWL PELLETS FROM WESTERN NEBRASKA ▪ Eric A. Rickart
SUMMER OBSERVATIONS OF THE SHORT-EARED OWL IN THE RED RIVER VALLEY ▪ W. J. Walley
ADDITIONAL GLAUCOUS GULL RECORD FOR NORTH DAKOTA ▪ B. J. Rose
MIGRATION OF BIRDS IN NORTH DAKOTA DURING FALL 1971 ▪ Douglas H. Johnson, John T. Lokemoen and Paul F. Springer
WIDGEONGRASS BALLS ON ALKALI LAKES ▪ George A. Swanson and Paul F. Springer
A PROBABLE INSTANCE OF SONGBIRD COLLISION MORTALITY ▪ R. Wayne Weier
MUNICIPAL FLOODPLAIN …
The Development And Constitutionality Of The 1971 Delaware Coastal Zone Act, Francis Cameron
The Development And Constitutionality Of The 1971 Delaware Coastal Zone Act, Francis Cameron
Marine Affairs Theses and Major Papers
In June 1971, the Delaware Legislature passed the Delaware Coastal Zone Act that barred heavy manufacturing industry from locating in an area one to six miles deep along the state's 115 mile coastline. The act created a State Coastal Zone Industrial Control Board to hear appeals from decisions of the State Planner. In addition, the act prohibited the construction in the bay of marine terminals for the transshipment of liquid and solid bulk materials of any substance, (specifically aimed at offshore oil and coal transfer) from vessels to onshore facilities. The law's immediate effect was to block several hundred million …
Oil Pollution And The Coastal State, J. T. O'Brien
Oil Pollution And The Coastal State, J. T. O'Brien
Marine Affairs Theses and Major Papers
It will be the purpose of this paper to pose and answer this question...How has the legal competence of a coastal state been strengthened with respect to that state's ability to prevent marine oil pollution? The question by implication presupposes that a certain change in legal competence is in fact occurring. The legal and historical baseline from which to gauge this gradual change will be established by reviewing past milestones in oil pollution law. A closer examination will then be made of recent evolutionary changes in both international and national oil pollution law subsequent to the Torrey Canyon Disaster of …
External States And The Indian Ocean: The Potential For Confrontation, James P. Cartwright
External States And The Indian Ocean: The Potential For Confrontation, James P. Cartwright
Marine Affairs Theses and Major Papers
A study of the common interests of internal and external states in the Indian Ocean and identification of the methods, and their potential for confrontation, employed by external powers in pursuit of their interests. The historical interests of external powers in the Indian Ocean are depicted. Common interests, which have commanded the attention of internal states and external powers during recent years, are identified. The Indian Ocean is divided into five regions, each region characterized by the aforementioned common interests. The assets, mutual relations and interests of the littoral states comprising each region are described. The interests and methods of …
Water Resources News, Volume 4, No. 5, May 1972
Water Resources News, Volume 4, No. 5, May 1972
Water Current Newsletter
New Publications Available from NWRRI
Neuberger Named Chairman - Missouri RBC
Muskie's Pullout May Speed Up the Clearn Water Bill
UCOWR Report Nearing Completion
Clemson Developing Manpower-Training Project to Aid EPA
US and Russia to Cooperate on Water and other Problems
Summer Workshop at Toronto
Hydraulic Dredging Short Course
Dreding Operators Short Course
Government Buying of Waste Bonds is Urged by Treasury
WRC Asks Congress for More Money to Study Water Needs
New Organization
Real Estate Lakes Turning to Messes in a Year
Economic Implications of Pollution Control Policy
Cloud-Seeding Program for Southwestern Oklahoma
New Study Reports Released by Commission