Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- University of Nebraska - Lincoln (7165)
- Utah State University (1473)
- Department of Primary Industries and Regional Development, Western Australia (728)
- University of Nevada, Las Vegas (684)
- Portland State University (600)
-
- University of Arkansas, Fayetteville (543)
- University of Texas Rio Grande Valley (479)
- Loyola Marymount University and Loyola Law School (457)
- Old Dominion University (430)
- University of Colorado Law School (366)
- University of South Florida (365)
- SIT Graduate Institute/SIT Study Abroad (338)
- Louisiana State University (330)
- South Dakota State University (322)
- University of Kentucky (315)
- Clemson University (286)
- Edith Cowan University (256)
- Chulalongkorn University (220)
- Montana Tech Library (194)
- City University of New York (CUNY) (193)
- Montclair State University (191)
- United Arab Emirates University (164)
- International Centre of Insect Physiology and Ecology (156)
- Nova Southeastern University (152)
- University of Texas at El Paso (151)
- New Jersey Institute of Technology (140)
- Western Kentucky University (132)
- Wright State University (126)
- University of Rhode Island (123)
- Cal Poly Humboldt (121)
- Keyword
-
- Water quality (452)
- Western Australia (427)
- Climate change (422)
- Conservation (305)
- Sustainability (283)
-
- Invasive species (247)
- United States (225)
- Ecology (218)
- Biodiversity (183)
- Environment (183)
- Management (171)
- Agriculture (168)
- Nitrogen (151)
- Remote sensing (143)
- Wetlands (140)
- Restoration (138)
- Groundwater (137)
- Water (137)
- Nebraska (129)
- Habitat (124)
- Survival (124)
- Fisheries (120)
- Pollution (120)
- Drought (110)
- Climate (105)
- Natural resources (103)
- GIS (101)
- California (97)
- Environmental (97)
- Florida (97)
- Publication Year
- Publication
-
- United States Department of Agriculture Wildlife Services: Staff Publications (1276)
- School of Natural Resources: Faculty Publications (957)
- The Prairie Naturalist (483)
- Electronic Theses and Dissertations (398)
- School of Earth, Environmental, & Marine Sciences Faculty Publications (366)
-
- Independent Study Project (ISP) Collection (325)
- United States Geological Survey: Staff Publications (317)
- Theses and Dissertations (316)
- Memorandum (315)
- United States Department of Commerce: Staff Publications (301)
- Reports (290)
- Theses (270)
- LSU Master's Theses (235)
- School of Natural Resources: Dissertations, Theses, and Student Research (223)
- Water Current Newsletter (223)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (221)
- Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications (221)
- UNLV Theses, Dissertations, Professional Papers, and Capstones (214)
- Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298 (197)
- Silver Bow Creek/Butte Area Superfund Site (186)
- The Probe: Newsletter of the National Animal Damage Control Association (186)
- Graduate Theses and Dissertations (180)
- Environmental Science and Management Faculty Publications and Presentations (175)
- Fisheries Research Reports (173)
- USF Tampa Graduate Theses and Dissertations (172)
- Great Plains Wildlife Damage Control Workshop Proceedings (171)
- Arkansas Water Resources Center Technical Reports (170)
- Joint Fire Science Program Research Project Reports (160)
- All Peer-Reviewed Publications (156)
- Dissertations and Theses (149)
- Publication Type
Articles 20581 - 20610 of 22660
Full-Text Articles in Entire DC Network
The Probe, Issue 51 - March 1985
The Probe, Issue 51 - March 1985
The Probe: Newsletter of the National Animal Damage Control Association
THE PROBE
National Animal Damage Control Association No. 51 March, 1985
How Delicate is the Balance of Nature?
Changing U.S. Trapping Policy – A Handbook for Activists
1080 Registration
Letters to Ye Ed
8th U.S. circuit Court of Appeals states Indians may kill endangered species.
Financial Status of NADCA
Defenders of Wildlife Finances
USDI to USDA
Mountain Lions
Raccoon Roundworm
Gibson Island Fracas
Big Bend National Park Biosphere Reserve: A History Of Scientific Study - Volume I: A Narrative Description Of Scientific Study, John A. Bissonette, John W. Ault Iii
Big Bend National Park Biosphere Reserve: A History Of Scientific Study - Volume I: A Narrative Description Of Scientific Study, John A. Bissonette, John W. Ault Iii
Wildland Resources Faculty Publications
In 1971 the United Nations Educational, Scientific, and Cultural Organization (UNESCO) created the Man and the Biosphere (MAB) Program for the purpose of promoting rational use of the earth's resources. Formal involvement by the U.S. began in 1974. By 1976, 28 biosphere reserves had been selected in the U.S., including Big Bend National Park (BBNP) (Fig. 1). The purpose of this 2-volume report was to provide an interdisciplinary reference volume of literature citations for BBNP and the surrounding Chihuahuan Desert, and to provide a synopsis of research completed at BBNP.
The Prairie Naturalist Volume 17, No. 1. March 1985
The Prairie Naturalist Volume 17, No. 1. March 1985
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
TABLE OF CONTENTS
COMMUNITY ANALYSIS OF THE FOREST VEGETATION IN THE LOWER PLATTE RIVER VALLEY, EASTERN NEBRASKA ▪ S. J. Rothenberger
RECOLONIZATION OF A BURNED PRAIRIE BY MEADOW VOLES (Microtus pennsylvanicus) ▪ P. L. Vacanti and K. N. Geluso
AMERICAN COOT HABITAT IN NORTH DAKOTA ▪ H. A. Kantrud
OBSERVATIONS ON PRAIRIE DOG DISPERSAL IN MONTANA ▪ C. J. Knowles
WINTER FOOD HABITS OF THE SWIFT FOX ON THE CENTRAL HIGH PLAINS ▪ D. M. Zumbaugh and J. R. Choate
BOOK REVIEW
Ground …
Environmental Impact Of Being Busy In The Creation, Delmar Vander Zee
Environmental Impact Of Being Busy In The Creation, Delmar Vander Zee
Pro Rege
No abstract provided.
The Probe, Issue 50 - February 1985
The Probe, Issue 50 - February 1985
The Probe: Newsletter of the National Animal Damage Control Association
THE PROBE
National Animal Damage Control Association No. 50 February, 1985
Predator Control
Forest Service
New Sheep Depredation Control Method
The Effects of Shooting
Coyotes
Prevention and Control of Wildlife Damage
Coyote Lure
The Common Lab Rat
Brodifacoum
The Futre of Sport Hunting
The Defenders of Wildlife
Chaning U.S. Trapping Policy
Goats damaging the environment on San Clemente island.
ADC to USDA?
Letters to Ye Ed
Grizzly Eating Sheep
Eradicating Fruit Fly From Carnarvon, Kingsley Thomas Fisher
Eradicating Fruit Fly From Carnarvon, Kingsley Thomas Fisher
Journal of the Department of Agriculture, Western Australia, Series 4
Late last year the Mediteranean fruit fly (Ceratitis capitata Weidemann) was eradicated from Canarvon, Western Australia by using an intergrated programme of sterile insect releases and bait spraying.
The eradication marked the end of a four-year study on the use and effectiveness of the Sterile Insect Technique, a biological control technique which uses an insect pest against itself. such a study can be used as a basis for treating other threatening insect pests, such as the serious cattle pest screw-worm fly, should they be found in Asustralia.
Being a biological control method, the Sterile Insect Technique is an exellent …
Water Quality For Irrigation, P R. George
Water Quality For Irrigation, P R. George
Journal of the Department of Agriculture, Western Australia, Series 4
Although irrigation and salinity problems are frequently inseperable, there is a range of management methods that can be used to handle marginal quality water. Freuently these methods are simple, but require careful planning.
The wide range in tolerance of crops to salinity can be exploiter to ensure that appropriate crops are selected for the water available.
Because crops vary in their sensitivity to salt uptake in the leaves or the roots, watering methods can be changed to avoid problems. For profitable production enough water should be applied to ensure adequate water is available for plant growth as well as to …
The Endangered Species Act And Water Development Within The South Platte Basin, Lawrence J. Macdonnell, University Of Colorado Boulder. Natural Resources Law Center, Geological Survey (U.S.), Colorado Water Resources Research Institute
The Endangered Species Act And Water Development Within The South Platte Basin, Lawrence J. Macdonnell, University Of Colorado Boulder. Natural Resources Law Center, Geological Survey (U.S.), Colorado Water Resources Research Institute
Books, Reports, and Studies
v, 122, 19 p. : maps ; 28 cm
Cooperatives: Their Effectiveness And Limitations For Small-Scale Fisheries Development, Hiroaki Yonesaka
Cooperatives: Their Effectiveness And Limitations For Small-Scale Fisheries Development, Hiroaki Yonesaka
Marine Affairs Theses and Major Papers
Increased experience in fisheries cooperatives of developing countries has called into question a long-held presumption about their desirability and feasibility. In this context, this study attempts to reformulate the cooperative approach for small-scale fisheries in a realistic policy framework. First, past failures of fisheries cooperatives are analyzed from three different angles: the uniqueness of the fishing industry, systems intrinsic to the cooperative, and development policy. Second, various possibilities of building viable cooperatives are explored by introducing two key concnpets: the strategic option and the operational option. On the one hand, the strategic option implies that it is imperative to integrate …
Evaluation Of The U. S. Army Corps Of Engineers' Decision-Making Process For Selection Of Dredged Material Disposal Sites, Brian P. Thompson
Evaluation Of The U. S. Army Corps Of Engineers' Decision-Making Process For Selection Of Dredged Material Disposal Sites, Brian P. Thompson
Marine Affairs Theses and Major Papers
This study evaluates the decision-making process of the U.S. Army Corps of Engineers (COE) as it applies to the selection of land or open-water disposal sites for sediment from dredging projects planned by the COE. The study seeks to illustrate: 1) the structure of the COE decision-making process as provided for in laws, regulations, and COE policies; 2) the operational, economic, and environmental variables that might influence COE decision-making; 3) how the New England Division of the COE makes decisions on disposal sites for dredged material through consideration of operational, economic and environmental objectives. The study finds that the COE …
The Probe, Issue 49 - January 1985
The Probe, Issue 49 - January 1985
The Probe: Newsletter of the National Animal Damage Control Association
THE PROBE
National Animal Damage Control Association No. 49 January, 1985
ADC to USDA?
National Pesticide
Information Retrieval System
Mole Control Gum
Letters to Ye Ed
2nd Eastern Wildlife Damage Control Conference
ASTM
Mouse Contamination
USFWS Trappers
Control of Starlings
Zinc Phosphide
White-Tailed Deer: Ecology and Management
Wildlife Pest Control Around Gardens and Homes
Wildlife Control Technology
Animal Damage Control
The Green Movement: Implications For Animals, Ronnie Z. Hawkins
The Green Movement: Implications For Animals, Ronnie Z. Hawkins
Environment Collection
The Green movement, a newly emerging political movement that is both global in scope and firmly anchored to each local region at the grassroots level, is destined to be of great import to those concerned with the status of nonhuman animals in our society. Closely allied with deep ecology and bioregionalism, Green thinking embodies an alteration in our perception of the human organism: no longer seen as separate from and superior to all the other components of the ecosystem, our species is placed in context as one among many interdependent forms of life, with the attainment of a sustainable balance …
Fisheries Report No 69 - The Western Rock Lobster Fishery 1979 - 1980, R. S. Brown, E. H. Barker
Fisheries Report No 69 - The Western Rock Lobster Fishery 1979 - 1980, R. S. Brown, E. H. Barker
Fisheries Research Reports
The fishery for the western rock lobster Panulirus cygnus one of the most important single fisheries in Australia and an important export earner for the State. Western Australia produced 10 724 tons in 1979/80, out of a total Australian catch of rock lobster of 14 739 tons. The fishery is governed by a complex set of regulations which have been reviewed by Bowen (1971) and Hancock (1981) and which are designed to limit the total fishing effort to acceptable levels and to enforce a legal minimum size. It is thus important to constantly monitor the state of the fishery both …
Fisheries Report No 72 - The Western Rock Lobster Fishery 1980 - 1981, R. S. Brown, E. H. Barker
Fisheries Report No 72 - The Western Rock Lobster Fishery 1980 - 1981, R. S. Brown, E. H. Barker
Fisheries Research Reports
The fishery for the western rock lobster Panulirus cygnus is one of the most important single fisheries in Australia and an important export earner for the State. Western Australia produced 9 957 tonnes in 1980/81, out of a total Australian catch of rock lobster of 15 565 tonnes. The fishery is governed by a complex set of regulations which have been reviewed by Bowen (1971) and Hancock (1981) and which are designed to limit the total fishing effort to acceptable levels and to enforce a legal minimum size. It is thus important to constantly monitor the state of the fishery …
Fundy Tidal Power: A Need To Reassess The Environmental Framework Protecting The Transboundary Environment, Robert W. Rudolph
Fundy Tidal Power: A Need To Reassess The Environmental Framework Protecting The Transboundary Environment, Robert W. Rudolph
Marine Affairs Theses and Major Papers
The concept of harnessing the tides for energy is receiving renewed attention in the maritime provinces of Canada and northeastern United States where a scarcity of indigenous energy resources exists. While proposals for several small tidal power facilities are being considered in Maine, in Canada, Nova Scotia officials are moving ahead with plans for a major tidal power project (4,028 MW) in the Minas Basin in the Bay of Fundy. The vast majority of the power generated from this facility is expected to be exported to the New York and New England areas which have a greater energy demand that …
Fisheries Report No 70 - The Western Rock Lobster Fishery 1982 - 1983, R. S. Brown, E. H. Barker
Fisheries Report No 70 - The Western Rock Lobster Fishery 1982 - 1983, R. S. Brown, E. H. Barker
Fisheries Research Reports
The fishery for the western rock lobster Panulirus cygnus is one of the most important single fisheries in Australia and an important export earner for the State. Western Australia produced a record 12 416 tons in 1982/83, out of a total Australian rock lobster catch of 18 192 tons. The fishery is governed by a complex set of regulations which have been reviewed by Bowen (1971) and Hancock (1981) and which are designed to limit the total fishing effort to acceptable levels and to enforce a legal minimum size. It is thus important to constantly monitor the state of the …
Fisheries Report No 68 - The Commercial Fishery For Barramundi (Lates Calcarifer) In Western Australia, Dr N. Morrissy
Fisheries Report No 68 - The Commercial Fishery For Barramundi (Lates Calcarifer) In Western Australia, Dr N. Morrissy
Fisheries Research Reports
Commercial catch and effort data from the Western Australian fishery for barramundi, Lates calcarifer, over eight years to 1982-83 were analysed. Major stocks and areas of this fishery are Cambridge Gulf (Ord River, port of Wyndham), Kimberley coast, King Sound and Broome coast (Fitzroy River, ports of Derby and Broome), and Pilbara coast (ports of Port Hedland, Roebourne and Onslow) where the Ashburton River is the southern limit to the distribution of barramundi on the west coast. As elsewhere, barramundi stocks are associated with river systems. The Low annual catch of about 30 tonnes appears to be due to the …
Community Ecology, Robert K. Rose, Elmer C. Birney
Community Ecology, Robert K. Rose, Elmer C. Birney
Biological Sciences Faculty Publications
COMMUNITIES with Microtus tend to be structurally simple, usually grasslands or tundra, and to have no more than two species of Microtus and rarely more than six species of small mammals. Microtus often dominates both numerically and in total small mammal biomass, especially at higher latitudes. The small mammal community is most influenced by Microtus through its fluctuations in density, and thus also in biomass, by its relatively high level of diurnal activity, and by its year-round activity. Other species of small mammals may be adversely affected because Microtus usually is larger and behaviorally dominant and also because the mere …
Acidification Sources In Red Alder And Douglas-Fir Soils -- Importance Of Nitrification, H. Van Miegroet, D. W. Cole
Acidification Sources In Red Alder And Douglas-Fir Soils -- Importance Of Nitrification, H. Van Miegroet, D. W. Cole
Watershed Sciences Faculty Publications
Precipitation, throughfall, forest floor, and soil leachate samples were monitored continuously in 1981 and 1982 in a N-poor Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] forest and a red alder (Alnus rubra Bong.) forest growing adjacently on a glacial soil in western Washington. The purpose of the study was to quantify the relative importance of atmospheric vs. natural sources of H+ input to forest soil acidification, and to determine the role of N transformation processes in the overall H+ balance of soils with different N status. Rainwater samples had an avg pH of 4.7 and annual H+ deposition via precipitation averaged 320 …
The Vertical Distribution And Feeding Chronology Of Larval Bear Lake Sculpin (Cottus Extensus) In Bear Lake, Utah-Idaho, D. Neverman Devroy, Wayne A. Wurtsbaugh, S. Ohlhorst
The Vertical Distribution And Feeding Chronology Of Larval Bear Lake Sculpin (Cottus Extensus) In Bear Lake, Utah-Idaho, D. Neverman Devroy, Wayne A. Wurtsbaugh, S. Ohlhorst
Watershed Sciences Faculty Publications
Preliminary sampling in Bear Lake, Utah/Idaho, with bottom trawls and larval fish nets indicate
Analysis Of Arkansas Fur Harvest Records - 1942-1984: Ii. Species Accounts, James H. Peck, Joseph D. Clark, Tiny Sheldon, Gary A. Heidt
Analysis Of Arkansas Fur Harvest Records - 1942-1984: Ii. Species Accounts, James H. Peck, Joseph D. Clark, Tiny Sheldon, Gary A. Heidt
Journal of the Arkansas Academy of Science
Fur harvest records were maintained by the Arkansas Game and Fish Commission on the following 16 furbearers: badger, beaver, bobcat, eastern spotted skunk (civet), coyote, gray fox, long-tailed weasel, mink, muskrat, nutria, opossum, raccoon, red fox, red wolf, river otter, and striped skunk. These harvest records were analyzed for each species in terms of mean pelt price and numbers of pelt sold by region (Ozark Mountains, Ouachita Mountains, Gulf Coastal Plain, and Mississippi Delta) per year. Historical or biological influences important in interpreting species accounts are presented.
Changes In Forest Soils Following Clearcutting Of Pine Forests In The Ouachita Mountains Of Arkansas, Harlan R. Stoin, Bajuri Bin Kadmin, Lyell F. Thompson
Changes In Forest Soils Following Clearcutting Of Pine Forests In The Ouachita Mountains Of Arkansas, Harlan R. Stoin, Bajuri Bin Kadmin, Lyell F. Thompson
Journal of the Arkansas Academy of Science
Soil characteristics of the mineral surface soil (0-6 cm) on three small watersheds in the Ouachita Mountains of Arkansas from which the pine forests have been clearcut, crushed, and burned for site preparation were studied for the first two years following clearcutting and compared to soils from adjacent uncut pine forest watersheds. Following clearcutting and burning, soil pH was generally higher than in uncut forest soils. The greatest pH differences occurred within several months of burning and generally decreased through the end of the second year. Soil organic matter content was lower immediately following clearcutting and burning and increased to …
Evaluation Of Seasonal Habitat Use By White-Tailed Deer In Eastern South Dakota, Thomas James Kramlich
Evaluation Of Seasonal Habitat Use By White-Tailed Deer In Eastern South Dakota, Thomas James Kramlich
Electronic Theses and Dissertations
Seasonal use of selected habitat types by white-tailed deer (Odocoileus virginianus) was investigated using radio telemetry locations during 1983 and 1984, on a predominantly agricultural area in east-central South Dakota. In the summer of 1983, radio-collared deer used corn, shelterbelts, and wetlands in proportion to their availability. Soybeans, grainfields, and grasslands were avoided. Deer selected shelterbelts in the fall and wetlands during the winter months, for protective cover. Habitat use shifted in the spring and shelterbelts received heavy use, once they became free of drifted snow. Shelterbelts continued to be selected by deer during the summer of 1984. IN the …
Evaluation Of Structure And Growth Of Bluegills And Black Bullheads Stocked With Largemouth Bass In South Dakota Farm Ponds, Charles E. Morris
Evaluation Of Structure And Growth Of Bluegills And Black Bullheads Stocked With Largemouth Bass In South Dakota Farm Ponds, Charles E. Morris
Electronic Theses and Dissertations
A two-year study estimated standing stock, growth, condition, survival rates, and population structure of bluegills (Lepomis macrochirus) and black bullheads (Ictalurus melas) stocked in South Dakota farm ponds with largemouth bass (Micropterus salmoides). Bluegills and black bullheads reproduced during the second growing seasons and by the end of the study three year-classes of fishes were present in most ponds. Mean back-calculated bluegill total lengths at annuli 1-3 were 58, 125, and 153 mm, respectively. Mean back-calculated black bullhead total lengths at annuli 1-3 were 82, 182, and 240 mm, respectively. A significant north vs south difference (P≤0.05) in third-year bullhead …
Analysis Of Arkansas Fur Harvest Records - 1942-1984: Iii. Harvest-Price Relationships, Joseph D. Clark, Gary A. Heidt, Tina Sheldon, James H. Peck
Analysis Of Arkansas Fur Harvest Records - 1942-1984: Iii. Harvest-Price Relationships, Joseph D. Clark, Gary A. Heidt, Tina Sheldon, James H. Peck
Journal of the Arkansas Academy of Science
Correlation and linear regression analyses between mean annual pelt price and total harvest of 13 Arkansas furbearer species between 1965 and 1983 were performed for state and regions (Ozark Mountains, Ouachita Mountains, Gulf Coastal Plain, and Mississippi Delta). Statewide, strong correlations (r > 0.80) were identified for bobcat (Felis rufus), coyote (Canis latrans), gray fox (Urocyon cinereoargenteus), mink (Mustela vison), nutria (Myocastor coypus), opossum (Didelphis virginiana), and raccoon (Procyonlotor). Moderate correlations (r = 0.55 - 0.79) were identified for eastern spotted skunk (Spilogale putorius), muskrat (Ondatra zibethicus), river otter (Lutra canadensis), and striped skunk (Mephitis mephitis). Nonsignificant correlations (r < 0.468) were shown for beaver (Castor canadensis) and long-tailed weasel (Mustela frenata). Regional differences were noted for each species.
Watershed Land Uses And Phosphorus Export Coefficient Relationships: A Planning Tool For Lake Resources Management, Carl R. Stapleton
Watershed Land Uses And Phosphorus Export Coefficient Relationships: A Planning Tool For Lake Resources Management, Carl R. Stapleton
Journal of the Arkansas Academy of Science
Relationships between nonpoint source pollutant loadings and water quality degradation in lakes have been established. However, practical methodologies necessary to identify and manage nonpoint sources in accordance with lake water quality indices have been lacking. Objectives of the current study were as follows: (1) to compare predicted model values for in-lake total phosphorus (TP) concentrations with actual values; and (2) to determine the applicability of areal phosphorus loading models for lake resources management. The research site was located 19 km west of the City of Little Rock in the Lake Maumelle basin. Areal total phosphorus (TP) loadings in g m^-2yr^-1 …
Efficiency Of Two Black-Tailed Prairie Dog Rodenticides And Their Impacts On Non-Target Bird Species, Anthony Dean Apa
Efficiency Of Two Black-Tailed Prairie Dog Rodenticides And Their Impacts On Non-Target Bird Species, Anthony Dean Apa
Electronic Theses and Dissertations
In 1983 zinc phosphide, strychnine with prebait, and strychnine without prebait were applied to black-tailed prairie dog (Cynomys ludovicianus) colonies in west-central South Dakota. Short-term (4 days later) and long-term (1 year later) poison efficiency and impact (short-term and long-term) on horned larks (Eromophila alpestrus) and other seed-eating birds of the prairie dog colonies were evaluated. Prairie dog burrow densities ranged from 54-187 burrows/ha with an average burrow density of 114 ±8 (± SE) burrows/ha. Rodenticide short-term control reduced active burrows by 95% with zinc phosphide, 42% with only strychnine, and 78% with prebaited strychnine. More zinc phosphide was consumed …
Distribution, Temperature Selection, And Gonadal Development Of Fishes In A Power Plant Cooling Reservoir, Henry R. Maddux
Distribution, Temperature Selection, And Gonadal Development Of Fishes In A Power Plant Cooling Reservoir, Henry R. Maddux
Electronic Theses and Dissertations
The distribution, temperature selection, and gonadal development of fishes in the Big Stone Power Plant cooling reservoir were examined from July 1982 through July 1983. A total of 46.8% of the fishes captured during this study were from the discharge area, while 31.8% and 21.4% of the fish occurred in the mixing and intake areas, respectively. The mean water temperature occupied by common carp (Cyprinus carpio) ranged from 7.5 C in February to 31.2 C in August. Black bullheads (Ictalurus melas) were generally benthic and captured in the cooler water. The mean water temperature occupied by black bullheads ranged from …
A Study Of Trihalomethane Precursors In Deer Creek Reservoir, Megan J. White, V. Dean Adams
A Study Of Trihalomethane Precursors In Deer Creek Reservoir, Megan J. White, V. Dean Adams
Reports
Deer Creek Reservoir and tributaries were monitored from May to December 1983 in a study of the occurrence of trihalomethane (THM) precursors in the reservoir and nutrient dynamics of the reservoir system. Microcosms were used to study the effect of the following parameters on THM precursor production in the reservoir system: phosphorus loading, sediment, algal growth, and application of algicide. Additionally, THM precursor concentrations of interstitial water were analyzed in reservoir and microcosm sediment samples. Microcosms treated with ahigh phosphorus loading (70 ug/1) had THM precursor concentrations significantly higher than those measured in microcosms treated with a low phosphorus loading …
Development Of Design Criteria For Sensitizer Photooxidation Treatment Systems, Richard J. Watts, V. Dean Adams, E. Joe Middlebrooks
Development Of Design Criteria For Sensitizer Photooxidation Treatment Systems, Richard J. Watts, V. Dean Adams, E. Joe Middlebrooks
Reports
Sensitized photooxidation is a physicochemical process that can degrade many toxic and refractory organic pollutants. A trace quantity of sensitizer added to the waste absorbs visible light; electronically excited intermediates then transfer the energy to decompose the waste. Engeineering design criteria were developed for industrial waste treatment lagoons that would use sensitized photooxidation. Design criteria were developed regarding optimum lagoon pH, optimum sensitizer concentration, depth and sizing of lagoons, dissolved oxygen requirements, and effect of temperature on photooxidation rate. Treatment of the refractory pesticides bromacil, terbacil, and fluometuron was investigated using methylene blue and riboflavin as sensitizers. Methylene blue-sensitized photooxidation …