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Articles 1 - 18 of 18
Full-Text Articles in Fresh Water Studies
Report On Water Pollution Problems In Las Vegas Wash And Las Vegas Bay, Environmental Protection Agency
Report On Water Pollution Problems In Las Vegas Wash And Las Vegas Bay, Environmental Protection Agency
Publications (WR)
This report was prepared by the Federal Water- Quality Administration, Pacific Southwest Region, now the Environmental Protection Agency (EPA), Region IX, at the request of the State of Nevada, Department of Health, Welfare, and rehabilitation. In a letter, dated December 5, 1969, this agency asked for technical assistance, as authorized by the Federal Water Pollution Control Act, in developing discharge standards appropriate for Las Vegas Bay, Lake Mead, and the Lower Colorado River. The subsequent study was performed by EPA from January through August, 1970. The establishment of Nevada State Water Quality Standards for these waters will enable responsible officials …
A Study Of Phytoplankton Dynamics In Lake Fayetteville As A Means Of Assessing Water Quality, Richard L. Meyer
A Study Of Phytoplankton Dynamics In Lake Fayetteville As A Means Of Assessing Water Quality, Richard L. Meyer
Technical Reports
Phytoplankton community was analyzed for seasonal and vertical distribution in Lake Fayetteville. This northwest Arkansas reservoir maintains a stable water level and chemical input with a relatively constant, slow overflow. Its source is groundwater seepage through a calcareous substrate with little contribution from the limited drainage basin. Phytoplankton community development with its associations and assemblages, chlorophylls -a, -b and c, and biomass distribution are described. The seasonal cycles of the chemical parameters NH4-N, NO2-N, NO3-N, ortho-phosphate, silicon, pH, HCO3- and total-alkalinity plus oxygen are described and discussed. The physical parameters of temperature, light and climate are included. The interaction of …
Interim Report On Water Quality Investigation Degray Reservoir, Arkansas, J. Nix
Interim Report On Water Quality Investigation Degray Reservoir, Arkansas, J. Nix
Technical Reports
Impoundment of the Caddo River near Arkadelphia, Arkansas began in August, 1969. Detailed patterns of the dissolved oxygen distribution in this reservoir are presented for the period September, 1969 through April, 1971. Although the reservoir had not reached normal pool elevation, thermal stratification accompanied by severe hypolimnic oxygen depletion has been observed. The dissolved oxygen data show that an under flow occurs in the fall of the year and carries dissolved oxygen into the hypolimnic zone. The gradients of dissolved oxygen concentration observed during the winter indicate that the reservoir does not undergo complete mixing. A short summary of the …
Phytoplankton Composition At Lake Drummond In The Dismal Swamp, Virginia, William Howard Poore Jr.
Phytoplankton Composition At Lake Drummond In The Dismal Swamp, Virginia, William Howard Poore Jr.
Biological Sciences Theses & Dissertations
Abstract unavailable.
A Conceptual Draft Of A Dynamic Hydro-Biological Model For Lake Mead, L. G. Everett, Bureau Of Reclamation
A Conceptual Draft Of A Dynamic Hydro-Biological Model For Lake Mead, L. G. Everett, Bureau Of Reclamation
Publications (WR)
Food and energy transformation in an aquatic system must be understood in order to develop a simulation approach. This report provides a comprehensive study of an aquatic ecosystem. The objectives of this report are to show:
(1) the biological relationships in an aquatic system
(2) the role of nutrients in the biological cycle
(3) the role of abiotic factors in a limnetic environment
(4) the status of the art of "Eutrophication modeling".
1971 Field Experimental Results, T. O. Albertsen
1971 Field Experimental Results, T. O. Albertsen
Experimental Summaries - Plant Research
Maintenance P and S for pastures in low rainfall areas
66MO6, 67MO1, 68NO5, 68TS1, 65A1, 65C5, 69WH1,66KA7, 66LG1, 68LG1, 65N5, 67GE2, 67NO5, 66NA3, 66ME3, 66NO9.
Stocking rate and rate of super on Cyprus barrel Medic pasture
66M30.
Continuous cropping with N.P.S.
69NO1, 60NA1, 69ME1,69TS1.
Super rates for wheat
71GE5, 71GE6, 71GE40, 71J22, 71N15
Gypsum rates on rape
71GE31, 71TS24, 71TS25, 71NO22, 71NA22,71NA23, 71KA1, 71KA14, 71BY1, 71BR15, 71AL9.
Rates of phosphorus and sulphur on rape and wheat
71A16
Trial Results 1971, M L. Poole
Trial Results 1971, M L. Poole
Experimental Summaries - Plant Research
This report summarizes data for the following trials:
Trial 1. Rape varieties x time of seeding - Mt Barker R.S.
Trial 2. Rape varieties x time of seeding - Gibson
Trial 3. Rape varieties x time of seeding - Badgingarra R.S.
Trial 4. Rape harvesting trial-moisture content - Mt. Barker R.S.
Trial 5. Time of seeding x rates of seeding safflower
Trial 6. Time of seeding x rates of seeding sunflower
Trial 7. Depth control drill trial on rape.
Trial 8. Method of seeding trial on rape.
Trial 9. Sandblast trial - EDRS - Failed.
Trial 10. Rape varieties x …
Micronutrients And Biological Patterns In Lake Mead, Hasan K. Qashu, Lorne G. Everett, J. S. Carlson, Bureau Of Reclamation
Micronutrients And Biological Patterns In Lake Mead, Hasan K. Qashu, Lorne G. Everett, J. S. Carlson, Bureau Of Reclamation
Publications (WR)
Progressive increases in concentration of dissolved solids in the Colorado River water from Lake Powell to Imperial Dam seem to alter plankton dynamics and biological productivity of the river. Also, changes in biological productivity and micronutrients concentrations occur within the same reservoir. Development of a digital simulation model to predict micronutrients concentrations and biological productivity is necessary for diagnosing changes in plankton population and effluent-carrying capacity of the system.
The objectives of the study are: (1) to determine trace metal balance at different locations in Lake Mead, (2) to measure biological productivity and conduct plankton population counts at each sampling …
The Effect Of Las Vegas Wash Effluent Upon The Water Quality In Lake Mead, D. A. Hoffman, P. R. Tramutt, F. C. Heller, Bureau Of Reclamation
The Effect Of Las Vegas Wash Effluent Upon The Water Quality In Lake Mead, D. A. Hoffman, P. R. Tramutt, F. C. Heller, Bureau Of Reclamation
Publications (WR)
This study developed from observations made during an earlier study on Lake Mead which was reported in CHE-70, Water Quality Study of Lake Mead. Results from that study indicated that poor-quality water was flowing into the Las Vegas Bay reach of Boulder Basin, Lake Mead. Also reports of deteriorating water quality, resulting in taste and odors in domestic water supplies taken from Boulder Basin as well as a reduction in the attractiveness of Las Vegas Bay for recreational uses caused by aquatic plants and algae blooms, indicated a need for a concentrated study concerning the effects of flows from Las …
Environmental Changes Produced By Cold-Water Outlets From Three Arkansas Reservoirs, Carl E. Hoffman, Raj V. Kilambi
Environmental Changes Produced By Cold-Water Outlets From Three Arkansas Reservoirs, Carl E. Hoffman, Raj V. Kilambi
Technical Reports
Water qualities of two natural streams (Buffalo and Kings Rivers), one new coId-tailwater (Beaver), and two old coId-tailwaters (Norfork and Bull Shoals) in northwestern Arkansas were studied from July 1965 through October 1968. The essential difference between the old cold-tailwaters and natural streams is a change in water quality which allows the development of a new productive ecological environment. Features which typify the old tailwaters are as follows: (1) relatively homioithermal temperatures; (2) stream beds scoured by strong hydoelectric power generation currents; (3) abundant phytoplankton and benthic macroinvertebrates; and (4) absence of warm water game fishes. Environmental factors characterizing natural …
The Role Of Chemical Stimuli In The Pre-Spawning Behavior Of The Striped Blenny, Chasmodes Bosquianus, Marvis Lynn Haines
The Role Of Chemical Stimuli In The Pre-Spawning Behavior Of The Striped Blenny, Chasmodes Bosquianus, Marvis Lynn Haines
Dissertations, Theses, and Masters Projects
No abstract provided.
Benthic Macroinvertebrate Communities As Indicators Of Pollution In The Elizabeth River, Hampton Roads, Virginia, Michael Donald Richardson
Benthic Macroinvertebrate Communities As Indicators Of Pollution In The Elizabeth River, Hampton Roads, Virginia, Michael Donald Richardson
Dissertations, Theses, and Masters Projects
No abstract provided.
Analysis Of Morone Saxatilis And Morone Americanus Spawning And Nursery Area In The York-Pamunkey River, Virginia, Ronald Gilbert Rinaldo
Analysis Of Morone Saxatilis And Morone Americanus Spawning And Nursery Area In The York-Pamunkey River, Virginia, Ronald Gilbert Rinaldo
Dissertations, Theses, and Masters Projects
No abstract provided.
Age And Growth Of The Silver Perch (Bairdiella Chrysura), Scott F. Rhodes
Age And Growth Of The Silver Perch (Bairdiella Chrysura), Scott F. Rhodes
Dissertations, Theses, and Masters Projects
No abstract provided.
Age And Growth Of The Northern Puffer, Sphoeroides Maculatus (Bloch And Schneider), Joanne Lyczkowski-Shultz
Age And Growth Of The Northern Puffer, Sphoeroides Maculatus (Bloch And Schneider), Joanne Lyczkowski-Shultz
Dissertations, Theses, and Masters Projects
No abstract provided.
Impoundment Effects On Water Quality As Reflected In Parasitism Of Reservoir Basses, David A. Becker
Impoundment Effects On Water Quality As Reflected In Parasitism Of Reservoir Basses, David A. Becker
Technical Reports
Our aquatic environments are rapidly becoming useless as natural resources through pollution from various sources. It is therefore necessary for us to further understand the various means which relate to this process. The interrelationships between the physico-chemical and biological water qualities undergo marked changes during the ageing of a reservoir. Eutrophication of these impoundments render them rela-tively useless as natural resources. It thus becomes apparent that we must gain further knowledge of these processes if we are to devise methods for proper reservoir management.
The Role Of An Anadromous Fish, The Alewife, Alosa Pseudoharengus (Wilson), In Pesticide Transport, Thomas A. Barnard
The Role Of An Anadromous Fish, The Alewife, Alosa Pseudoharengus (Wilson), In Pesticide Transport, Thomas A. Barnard
Dissertations, Theses, and Masters Projects
No abstract provided.
Catfish Management In The James River, Virginia, James A. Lanier
Catfish Management In The James River, Virginia, James A. Lanier
Dissertations, Theses, and Masters Projects
No abstract provided.