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Articles 22411 - 22440 of 22648
Full-Text Articles in Entire DC Network
A Theoretical Study Of Infiltration Into Range And Forest Soils, Joel E. Fletcher, Yehia Z. El-Shafei
A Theoretical Study Of Infiltration Into Range And Forest Soils, Joel E. Fletcher, Yehia Z. El-Shafei
Reports
More than 400 rainfall simulator experiments were examined to detect which soil properties could be used to computer infiltration time relationships. Three theoretical equations were tested to determine their efficacy for calculating infiltration time relationships from soil and site characteristics. It was shown that both the modified Green and Ampt and Fletcher equations could by successfully used. Darcian type equations were developed on laboratory type samples which would show the relations between soil, solution and rainfall properties and infiltration. These latter equations have not been tested on undisturbed soils but give excellent agreement between measured and computed values for time …
A Thermodynamic Analysis Of A Primary Waste Stabilization Pond, David W. Hendricks
A Thermodynamic Analysis Of A Primary Waste Stabilization Pond, David W. Hendricks
Reports
Traditional design practice for waste stabilization ponds is based upon the premise that sufficient photosynthetic oxygen must be produced within the pond to satisfy oxygen requirements of the incoming waste flow. Thus, because algae production is proportional to pond surface area, surface organic loading rate is a principal design criterion (hydraulic detention time is the other) . That a possible adverse energy trade exists in the sequence of coupled reactions (aerobic waste degradation-photosynthesis) has been largely ignored. This work is focused on quantitatively articulating this energy trade, in terms of algae produced vis a vis waste degraded. This is done …
Some Ecological Relations Of Fairy Shrimps In Alkaline Habitats Of Nebraska, D. B. Mccarraher
Some Ecological Relations Of Fairy Shrimps In Alkaline Habitats Of Nebraska, D. B. Mccarraher
Nebraska Game and Parks Commission: Staff Research Publications
Ecological studies on the distribution of fairy shrimps have been made from 246 sites in the sandhills region of Nebraska. New records for Nebraska have been established for Artemia salina, Branchinecta campestris, B. lindahli, B. mackini and Cyzicus mexicanus. Seasonal populations of shrimp have been located in habitats containing permanent fish populations. Water mineralization was the dominant environmental condition related to the distribution of phyllopods with sodium and potassium compounds predominating in the strongly alkaline lakes. Several of the Artemia lakes were classified as hydroxide sites. Many of the alkaline ponds, where B. lindahli and B. campestris flourish, are …
Water Resources News, Volume 2, No. 1, January 1970
Water Resources News, Volume 2, No. 1, January 1970
Water Current Newsletter
Implementation of Legislative Bill LB57
Council on Environmental Quality Established
Users Charges Suggested for Flood Control and Navigation
Applied Mathematical Programming in Water Resources
NSF Seeks Proposals for Research on Social Problems
Tentative Regulations Issued for Water Pollution Control Grants
Research on Phosphate-Free Detergents Sought
Land Grant Colleges Urge Expansion of Water Centers
GAO Review of Pollution Control Effort
Additional Urban Water Needed
Listing of FWPCA Awards in Research
Research Review
New Publications Received by the Institute
Man And His Environment: The Ecological Limits Of Optimism, R. S. Miller, G. M. Woodwell, W. R. Burch, P. A. Jordan, R. L. Means
Man And His Environment: The Ecological Limits Of Optimism, R. S. Miller, G. M. Woodwell, W. R. Burch, P. A. Jordan, R. L. Means
Yale School of the Environment Bulletin Series
No abstract provided.
Natural Variation In Susceptibility Of Pinus To Neodiprion Sawflies As A Basis For The Development Of A Breeding Scheme For Resistant Trees, Walter R. Henson, Louis C. O'Neil, Francois Mergen
Natural Variation In Susceptibility Of Pinus To Neodiprion Sawflies As A Basis For The Development Of A Breeding Scheme For Resistant Trees, Walter R. Henson, Louis C. O'Neil, Francois Mergen
Yale School of the Environment Bulletin Series
No abstract provided.
Chemical Analyses Of Plant Tissues From The Hubbard Brook Ecosystem In New Hampshire, Gene E. Likens, F. Herbert Bormann
Chemical Analyses Of Plant Tissues From The Hubbard Brook Ecosystem In New Hampshire, Gene E. Likens, F. Herbert Bormann
Yale School of the Environment Bulletin Series
No abstract provided.
The Ocean Resource: A Scenario For Its Control, Ronald Poitras
The Ocean Resource: A Scenario For Its Control, Ronald Poitras
Marine Affairs Theses and Major Papers
As man expands his horizons on planet earth, he is beginning to turn increasingly to the oceans as a source of resources, and at a pace commensurate with the growth of his needs and his technical ability. Traditionally the deep sea has always been a "no man's land," an unlimited source of space to be traversed and used infrequently. A scarcity of natural resources and an abundance of human extensions (i.e. technology) are together making deep ocean seclusion a thing of the past. Increasing use of a particular resource is a limited space sooner or later implies an increasing need …
Blind River Dolphin: First Side-Swimming Cetacean, Earl S. Herald, Robert L. Brownell Jr., Fredric L. Frye, Elkan J. Morris, William Evans, Alan Scott
Blind River Dolphin: First Side-Swimming Cetacean, Earl S. Herald, Robert L. Brownell Jr., Fredric L. Frye, Elkan J. Morris, William Evans, Alan Scott
United States Department of Commerce: Staff Publications
The blind river dolphin (Platanista gangetica), first written about by Pliny the Elder in A.D. 72, was found (10 November 1968) to be the first known side-swimming cetacean. The rudimentary eye lacks the lens, but anatomical evidence suggests that the eye may serve as a light sensor. The underwater sound emissions of this species, although similar to those of the Amazon River dolphin (Inia geoffrensis), appear to be produced constantly.
Problems And Management Of Water Quality In Hillsborough Bay, Fl, Federal Water Pollution Control Administration
Problems And Management Of Water Quality In Hillsborough Bay, Fl, Federal Water Pollution Control Administration
Reports
Full scale filed operations began on June 8, 1967. Since that time, a pattern of pollution, water quality degradation and a complex ecological system has been defined.
Fisheries Report No Iv (6) - Report On The Current Status Of Crocodiles In Western Australia, H. Robert Bustard Dr
Fisheries Report No Iv (6) - Report On The Current Status Of Crocodiles In Western Australia, H. Robert Bustard Dr
Fisheries Research Reports
The aim of the survey was fivefold,
(1) to determine the present abundance and composition of saltwater crocodile populations in Western Australia,
(2) to comment on the status of the freshwater crocodile in Western Australia following 7 years of total protection,
(3) to locate study area(s) for detailed work on crocodile biology,
(4) to investigate the feelings of people on the spot (especially shooters or ex-shooters) towards crocodile conservation, and
(5) to investigate law enforcement problems relating to crocodiles
Water Resources News, Volume 1, No. 6, October 1969
Water Resources News, Volume 1, No. 6, October 1969
Water Current Newsletter
FY 1971 Basic Allotment Project Deadline
Data Bank Advisory Committee Appointed by Governor Tiemann
National Symposium on Data and Instrumentation for Water Quality Management
Fund Cutback on Water Resources
Funding for Corps of Engineers Programs
Water and Land Resources Study Committee
Matching Grant Program for FY 1971
1970 Summer Institute on Water Resources
Research Review
New Publications Received by the Institute
Virus Movement In Groundwater Systems, William A. Drewry
Virus Movement In Groundwater Systems, William A. Drewry
Arkansas Water Resources Center Technical Reports
The purpose of this study is to investigate the extent to which soil acts as an agent in the transmission of waterborne viruses. Since many waterborne outbreaks of viral diseases have involved small wellwater supplies contaminated by effluents from subsurface wastewater disposal systems, there is a great need for such information. Results of this study show that virus adsorption by soils is greatly affected by the pH, ionic strength, and soil-water ratio of the soil-water system and various soil properties. Also, it is shown that one cannot predict the relative virus adsorbing ability of a particular soil based on the …
Water Resources News, Volume 1, No. 5, September 1969
Water Resources News, Volume 1, No. 5, September 1969
Water Current Newsletter
New OWRR Director
Data Bank Bill Passed
Natural Resources Districting
Publicatino No. 2 Released
Thermal Pollution
Warren Hall Moves to Office of Science and Technology
Interior Department Organizes Urban Water Resources Research Program
New Director of Office of Saline Water
Changes in the Water Resources Research Act
Short Course - Ground Water Hydrology
Research Review
Sediments Of Biscayne Bay - Distribution And Depositional History, Harold R. Wanless
Sediments Of Biscayne Bay - Distribution And Depositional History, Harold R. Wanless
RSMAS Technical Reports
WANLESS, HAROLD R. (M.S., Marine Geology)
Sediments of Biscayne Bay - Distribution and Depositional History. (September 1967) Abstract of Master's Thesis at the University of Miami. Thesis supervised by Professor A. Conrad Neumann.
Three shallow elongate bays, Biscayne Bay, Card Sound and Barnes Sound trend south from Miami along the southeast Florida coast. Hand probing and coring through Recent sedimentary sequences within and bordering these bays has established the general character of the underlying bedrock topography, has revealed the general features of the sediment bodies and the spatial relations of the sediment types and has given insight into the …
Trace Metal Analysis Of Barren River And Nolin River Reservoirs By Atomic Absorption Spectroscopy, Mary Jo Kennedy
Trace Metal Analysis Of Barren River And Nolin River Reservoirs By Atomic Absorption Spectroscopy, Mary Jo Kennedy
Masters Theses & Specialist Projects
This research was part of a project underway at Barren River and Nolin River Reservoirs in south-central Kentucky. The research was partially supported by a grant through the Sport Fishing Institute, Washington, D.C.
The study reported herein was concerned with the analysis of trace metal concentrations in the two reservoirs. It is believed that the fish population may in part depend upon the trace metals present in the water. It is anticipated that the data presented in this paper will eventually be correlated with the biology studies of the reservoirs being carried out by the Department of Biology of Western …
New Life For Prairie Lakes, Clyde Brashier, T. W. Edminster
New Life For Prairie Lakes, Clyde Brashier, T. W. Edminster
2019: Dr. Clyde Brashier
No abstract provided.
Ultrasonic Shark Tag Monitoring System Technical Report, Thomas Thorson, Gordon Esterberg, James Johnson
Ultrasonic Shark Tag Monitoring System Technical Report, Thomas Thorson, Gordon Esterberg, James Johnson
School of Biological Sciences: Faculty Publications
Table of Contents:
Introduction
Description of System
Ultrasonic Tag
Ultrasonic Tag Monitor
Hyrdophones
Receiver-Recorder Unit
Receiver
Recorder
Batteries
Operation
Figures
Distribution List
Documentation Control Data – R & D (DD Form 1473)
Water Resources News, Volume 1, No. 2, June 1969
Water Resources News, Volume 1, No. 2, June 1969
Water Current Newsletter
OWRR DIRECTOR RESIGNS
RESEARCH ON URBAN WATER RESOURCES
WASTE GUIDE ON THERMAL POLLUTION
INFORMATION CENTER ON EUTROPHICATION
ASSISTANCE ON PREPARATION OF RESEARCH PROPOSALS
THE NATIONAL WATER COMMISSION
TITLE II OWRR RESEARCH
OFFICE OF WATER RESOURCES RESEARCH EXAMPLES OF PRIORITY RESEARCH SUBJECTS FOR TITLE II SUPPORT FISCAL YEAR 1971
RESEARCH REVIEW
NEWSLETTER ITEMS
Taxonomy Of The Common Dolphins Of The Eastern Pacific Ocean, Richard C. Banks, Robert L. Brownell Jr.
Taxonomy Of The Common Dolphins Of The Eastern Pacific Ocean, Richard C. Banks, Robert L. Brownell Jr.
United States Department of Commerce: Staff Publications
Delphinus bairdii Dall is a species of dolphin distinct from D. delphis Linnaeus, with which it has usually been synonymized. D. bairdii has a longer rostrum relative to the zygomatic width of the skull; the ratio of these measurements falls at 1.55 or above for bairdii and 1.53 and below for delphis. In the eastern Pacific Ocean, D. bairdii is found in the Gulf of California and along the west coast of Baja California, Mexico; D. delphis is presently found in the waters off California. Until approximately the beginning of the present century, bairdii occurred farther north in the …
Water Resources News, Volume 1, No. 1. May 1969
Water Resources News, Volume 1, No. 1. May 1969
Water Current Newsletter
OBJECTIVES OF THE NWRRI
NWRRI FISCAL YEAR 1970 PROGRAM SCHEDULE
S-162l RIVER BASINS RESEARCH ACT OF 1969
GROUNDWATER DISTRICT FORMED
PROGRAM FOR THE SECOND EVAPORTRANSPIRATION CONFERENCE
UNIVERSITIES COUNCIL ON WATER RESOURCES (UCOWR)
COUNTY EXTENSION AGENTS TRAINED IN FEEDLOT WASTES MANAGEMENT OWRR MATCHING GRANT APPROVED
FEDERAL WATER POLLUTION CONTROL ADiUNISTRATION FUNDS FOR RESEARCH AND DEVELOPMENT
WATER RESOURCES RESEARCH CATALOG
NWRRI PROJECTS SCHEDULED FOR FUNDING DURING FISCAL YEAR 1970
Stomatopod Crustacea Of The Western Atlantic, Raymond B. Manning
Stomatopod Crustacea Of The Western Atlantic, Raymond B. Manning
Studies in Tropical Oceanography
No abstract provided.
Dolichopodidae (Diptera) And Braconidae (Hymenoptera) Of Curlew Valley, G. F. Knowlton, W.J. Hanson, G.E. Bohart
Dolichopodidae (Diptera) And Braconidae (Hymenoptera) Of Curlew Valley, G. F. Knowlton, W.J. Hanson, G.E. Bohart
Memorandum
No abstract provided.
Promising Results On West Kimberley Pindan Country, A L. Payne
Promising Results On West Kimberley Pindan Country, A L. Payne
Journal of the Department of Agriculture, Western Australia, Series 4
IN the 22 to 28 inch rainfall belt of the West Kimberley area of Western Australia are extensive areas of what is locally known as "pindan" country.
The term "pindan" refers to a light red or yellow sandy soil type supporting scattered Eucalypts, sparse-dense wattle scrub and grasses such as curly spinifex, ribbon grass and native sorghum.
Flora And Fauna Conservation : A Plea To Landholders, Clee Francis Howard Jenkins
Flora And Fauna Conservation : A Plea To Landholders, Clee Francis Howard Jenkins
Journal of the Department of Agriculture, Western Australia, Series 4
MUCH of the recent discussion on conservation has centred around the importance of wild flower reserves and the necessity for protecting one of the State's most important tourist attractions.
Although less important to visitors than the flowers, many of our wild animals hold equal interest for nature lovers and scientists, and they also need protection.
Honey Plants In Western Australia, F. G. Smith
Honey Plants In Western Australia, F. G. Smith
Bulletins - 3000 - 3999
Successful honey production depends, among other things on a good knowledge of the plants which produce nectar.
Every apiarist needs to know which plants are of importance to honey-bees, where those plants occur, and when they flower. He also needs to know which plants produce nectar which will result in the production of good quality honey, and which produce unpalatable or unmarketable honey. To maintain the strength of his bee colonies he also needs to know which plants produce nutritious pollen.
The object of this bulletin is to provide the basic information on these subjects in the main beekeeping areas …
Wood Formation And The Concept Of Wood Quality, Philip R. Larson
Wood Formation And The Concept Of Wood Quality, Philip R. Larson
Yale School of the Environment Bulletin Series
No abstract provided.
Pasture Improvement In South Western Australia, J W. Malcolm
Pasture Improvement In South Western Australia, J W. Malcolm
Journal of the Department of Agriculture, Western Australia, Series 4
"There is no doubt that Australia's enhanced prosperity in the last 30 years has been dependent in no small measure on the use of legume-based pastures." E. M. Hutron, June, 1968. *
THE LAST 30 years have seen an increased interest in pasture improvement which has transformed much of Western Australia. Large areas have been sown to new and improved pasture species—as a result productivity of both livestock and cereal enterprises has risen.
Chemical Ploughing, Geoffrey A. Pearce
Chemical Ploughing, Geoffrey A. Pearce
Journal of the Department of Agriculture, Western Australia, Series 4
PROGRESS in the field of chemical weed control has been spectacular in recent years. One field that is attracting interest is the idea of replacing cultivation with chemical sprays.
Saltland Pastures, C V. Malcolm
Saltland Pastures, C V. Malcolm
Journal of the Department of Agriculture, Western Australia, Series 4
FOLLOWING THE DEVELOPMENT of Agriculture in Western Australia considerable areas of highly productive land have become salt affected to the degree that normal crops and pastures cannot be grown.*
However, species and establishment methods are available which can bring at least some of this land back into production.