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Articles 50341 - 50370 of 52670
Full-Text Articles in Entire DC Network
Programming Phase Of Water Response Ecosystem Model: Ii. Abiotic Submodels, P. W. Lommen, K. A. Marshall
Programming Phase Of Water Response Ecosystem Model: Ii. Abiotic Submodels, P. W. Lommen, K. A. Marshall
Progress reports
No abstract provided.
Programming Phase Of Water Response Ecosystem Model: Iv. Perennial Plant, Nitrogen And Decomposition Submodels, P. W. Lommen, D. C. Wilkin
Programming Phase Of Water Response Ecosystem Model: Iv. Perennial Plant, Nitrogen And Decomposition Submodels, P. W. Lommen, D. C. Wilkin
Progress reports
No abstract provided.
Water Current, Volume 8, No. 1, January/February 1976
Water Current, Volume 8, No. 1, January/February 1976
Water Current Newsletter
Evolving Groundwater Management Policies
Water Resources Seminars
1976 Water Conference
Water Research in Nebraska
OWRT Seeks Applications for One-Year Appointment as Research Scholar
Nonpoint Sources Causing Water Quality Problems
Research Review: Mapping Model for Determining Land Suitable for Irrigation
Reflectant Induced Modification Of Soybean Canopy Radiation Balance. Iv. Leaf And Canopy Temperature, M. W. Baradas, B. L. Blad, N. J. Rosenberg
Reflectant Induced Modification Of Soybean Canopy Radiation Balance. Iv. Leaf And Canopy Temperature, M. W. Baradas, B. L. Blad, N. J. Rosenberg
School of Natural Resources: Faculty Publications
No abstract provided.
Forest Management Planning For Timber Production: A Goal Programming Approach, Krishna P. Rustagi
Forest Management Planning For Timber Production: A Goal Programming Approach, Krishna P. Rustagi
Yale School of the Environment Bulletin Series
No abstract provided.
Blood And Tissue Identification Of Selected Birds And Mammals, Part Ii: Cross Reaction Patterns Of Birds And Mammals, Using Deer, Bovine, Raccoon, Chicken And Mallard Duck Antiserum, Part 3, David W. Oates, Debra L. Weigel
Blood And Tissue Identification Of Selected Birds And Mammals, Part Ii: Cross Reaction Patterns Of Birds And Mammals, Using Deer, Bovine, Raccoon, Chicken And Mallard Duck Antiserum, Part 3, David W. Oates, Debra L. Weigel
Other Publications in Wildlife Management
Part 3 (pp. 56-85)
Mammals (Figure 10)
Antelope
Badger
Beaver
Bobcat
Buffalo
Domestic Cat
Cow
Coyote
White-Tailed Deer
Dog
Elk
Red Fox
Blood And Tissue Identification Of Selected Birds And Mammals, Part Ii: Cross Reaction Patterns Of Birds And Mammals, Using Deer, Bovine, Raccoon, Chicken And Mallard Duck Antiserum, Part 4, David W. Oates, Debra L. Weigel
Blood And Tissue Identification Of Selected Birds And Mammals, Part Ii: Cross Reaction Patterns Of Birds And Mammals, Using Deer, Bovine, Raccoon, Chicken And Mallard Duck Antiserum, Part 4, David W. Oates, Debra L. Weigel
Other Publications in Wildlife Management
Part 4 (pp. 86-114)
Mammals (Figure 10), continued
Horse
Human
Mink
Opossum
Pig
Porcupine.
Prairie Dog
Raccoon
Big Horn Sheep
Domestic Sheep
Striped Skunk
Fox Squirrel
Discussion
Sealing Farm Dams, I A F Laing, R. G. Pepper
Sealing Farm Dams, I A F Laing, R. G. Pepper
Journal of the Department of Agriculture, Western Australia, Series 4
Research over the past 10 years has shown that it is technically possible to seal many leaking farm dams. In some situations a cheap chemical treatment is effective but in most cases it is cheaper to construct a replacement dam.
This article reviews the situation in western Australia and outlines some of the methods used for sealing dams.
Efficiency Of Sprinkler Irrigation Systems, T C. Calder
Efficiency Of Sprinkler Irrigation Systems, T C. Calder
Journal of the Department of Agriculture, Western Australia, Series 4
Shallow-rooted vegetable crops growing on sandy soils in hot, often windy summer weather, pose a difficult watering problem for most Western Australian vegetable growers.
Irregularities in wetting patterns are common. Wind effects are seldom taken into account in system design. The increasing popularity of knocker-type sprinklers makes these considerations particularily important.
Laboratory Apparatus For Providing Diel Temperature Regimes For Aquatic Animals, Wayne A. Wurtsbaugh, G. Davis
Laboratory Apparatus For Providing Diel Temperature Regimes For Aquatic Animals, Wayne A. Wurtsbaugh, G. Davis
Watershed Sciences Faculty Publications
In studies of the effects of elevated temperature on aquatic organisms, little emphasis has been placed on modeling the fluctuating temperatures to which organisms are exposed in nature. To some extent this may be related to problems of design and maintenance of apparatus for fluctuating temperature control. The complexity of apparatus used to provide cycled temperatures has ranged from manually controlled valves for introducing water of different temperatures into aquariums (Kelso 1972), to a complex and expensive feedback system, regulated by rotating cams, that controls the temperature of influent water (Honeywell Cam Programmer Thermometers, Fort Washington, Pennsylvania). To facilitate studies …
Capability Of Integer Programming Algorithms In Solving Water Resource Planning Problems, Trevor C. Hughes, William J. Grenney, A. Bruce Bishop, Calvin G. Clyde, Rangesan Narayanan, Paul E. Pugner
Capability Of Integer Programming Algorithms In Solving Water Resource Planning Problems, Trevor C. Hughes, William J. Grenney, A. Bruce Bishop, Calvin G. Clyde, Rangesan Narayanan, Paul E. Pugner
Reports
The feasibility of optimizing large regional water resource planning problems by means of integer programming algorithms is analyzed. Two types of integer programming models are developed: (1) A water supply model including 23 separate but geographically related community systems; and (2) a river basin water quality model including 15 point sources of wastewater, 4 types of pollutants, 6 surveillance points, and 7 alternative treatment processes. The water supply model was structured as a mixed integer problem (some continuous variables included) while the water quality model was an all integer problem. Four integer programming algorithms were tested on the sample problems …
Evaluation Of The Addition Of Granular Media Filtration To Wastewater Treatment Plants To Meet New Standards, Madhusudan M. Dawda, M. L. Davidson, E. J. Middlebrooks
Evaluation Of The Addition Of Granular Media Filtration To Wastewater Treatment Plants To Meet New Standards, Madhusudan M. Dawda, M. L. Davidson, E. J. Middlebrooks
Reports
A dual media filtration study was carried out at the central Weber Wastewater Treatment Plant in Ogden, Utah, to evaluate its feasibility as a tertiary treatment to meet new effluent quality standards. A review of the literature indicated that dual media filters were more efficient than conventional single media sand filters because of the “in depth” filtration achieved by dual media filters. An experimental filter was operated at four different hydraulic loading rates, ranging from 3 to 6 gpm/ft 2 (122.10 to 244.20 1/min/m2), to evaluate its effects on effluent quality. Hydraulic loading rate was shown not to affect suspended …
Iron Dynamics In A Gas-Water-Sediment Microcosm, Peter A. Cowan, V. Dean Adams, Donald B. Porcella
Iron Dynamics In A Gas-Water-Sediment Microcosm, Peter A. Cowan, V. Dean Adams, Donald B. Porcella
Reports
Iron dynamics in eutrophic systems were studied in the laboratory utilizing gas-water-Sediment phase sealed microcosms. Sediments from Hyrum Reservoir (2.4 percent iron by weight) were placed in the dark to simulate the hypolimnetic regions of a eutrophic impoundment. Iron both chemically and physically was readily available to microorganisms of the aqueous phase because iron in these systems was soluble. In the light microcosms, which simulated shallow littoral regions of eutrophic impoundments, iron was found in higher aqueous phase concentrations than was predicted chemically and physically; this was rationalized through biological mechanisms. The experiment was conducted in two phases: Phase I …
Disposal Alternatives For Intermittent Sand Filter Scrapings Utilization And Sand Recovery, Jerry T. Elliott, Daniel S. Filip, James H. Reynolds
Disposal Alternatives For Intermittent Sand Filter Scrapings Utilization And Sand Recovery, Jerry T. Elliott, Daniel S. Filip, James H. Reynolds
Reports
A three phase study is used to develop disposal alternatives and cost analysis for algae laden sand scrapings removed from intermittent sand filters used to polish wastewater lagoon effluent. Phase I, Irrigation Technique, explores the feasibility of supplying sufficient water to sand scrapings to leach out entrapped material. Details of removal with amount of water applied are presented. Phase II, Soil Application, tests with lysimeters soil response to application of the algae laden sand material. Physical and chemical parameters are not markedly altered where algae laden sand is applied to the soil surface. Phase III, Plant Bioassays, grew tall fescue …
Nitrogen Cycling In Microcosms And Application To The Biology Of The Northern Arm Of The Great Salt Lake, John C. Stube, Frederick J. Post, Donald B. Porcella
Nitrogen Cycling In Microcosms And Application To The Biology Of The Northern Arm Of The Great Salt Lake, John C. Stube, Frederick J. Post, Donald B. Porcella
Reports
No abstract provided.
Application Of A Hydrologic Model To The Planning And Design Of Storm Drainage Systems For Urban Areas, George B. Shih, Eugene K. Israelsen, Robert N. Parnell, Jr., J. Paul Riley
Application Of A Hydrologic Model To The Planning And Design Of Storm Drainage Systems For Urban Areas, George B. Shih, Eugene K. Israelsen, Robert N. Parnell, Jr., J. Paul Riley
Reports
A generally applicable hybrid computer program is developed to simulate runoff from urban watersheds, and is applied to represent the outflow hydrographs of three urban watersheds located within Salt Lake County, Utah. The gaged outflow of the watersheds provided a means for comparing the observed and the simulated final outflow hydrographs. Each of the three watersheds was subdivided into spatial units or subzones, and the outflow hydrographs for each subzone were obtained by abstracting interceptions, infiltration, and depression storage from the rainfall hyetograph of each subzone. The resulting hydrograph outflow of each subzone was routed to the Jordan River, the …
Bsam: Basin Simulation Assessment Model Documentation And User Manual, Utah Water Research Laboratory
Bsam: Basin Simulation Assessment Model Documentation And User Manual, Utah Water Research Laboratory
Reports
No abstract provided.
An Economic Appraisal Of Reuse Concepts In Regional Water Supply Planning, Rangesan Narayanan, Bartell C. Jensen, A. Bruce Bishop, Kenneth S. Lyon
An Economic Appraisal Of Reuse Concepts In Regional Water Supply Planning, Rangesan Narayanan, Bartell C. Jensen, A. Bruce Bishop, Kenneth S. Lyon
Reports
Using a conceptual model of a water supply firm, the necessary conditions for production and market efficiency are derived when renovated wastewater is considered as a potential water resource. The nature and extent of the supply augmentation due to recycled reuse is demonstrated using classical optimization techniques. Three stages of short-run supply corresponding to no recycling, partial recycled reuse and complete recycling of all reclaimable water are identified through appropriate Lagrangian Multipliers as well as graphical techniques. A mathematical programming model is structured to determine the optimal water resource allocation and pricing policy for Salt Lake County. By maximizing the …
User Oriented Systems Analysis For Regional Municipal Water Supply Planning, Paul E. Pugner, Trevor C. Hughes
User Oriented Systems Analysis For Regional Municipal Water Supply Planning, Paul E. Pugner, Trevor C. Hughes
Reports
No abstract provided.
An Empirical Analysis Of Predictors Of Income Distribution Effects Of Water Quality Controls, John E. Keith, Ming C. Chen, Don C. Reading, Robert Johnson
An Empirical Analysis Of Predictors Of Income Distribution Effects Of Water Quality Controls, John E. Keith, Ming C. Chen, Don C. Reading, Robert Johnson
Reports
No abstract provided.
Colorado River Basin Modeling Studies: Proceedings Of A Seminar Held At Utah State University Logan , Utah July 16-18, 1975, Calvin G. Clyde, Donna H. Falkenborg, J. Paul Riley
Colorado River Basin Modeling Studies: Proceedings Of A Seminar Held At Utah State University Logan , Utah July 16-18, 1975, Calvin G. Clyde, Donna H. Falkenborg, J. Paul Riley
Reports
Preface: Computer modeling is an important and valuable tool for water resources planning and management. In recent years many different modeling approaches and techniques have been developed. Some have been applied in the Colorado River Basin. A brief and incomplete search showed over fifty reports on modeling in the Colorado River Basin alone. The main motivation for this Seminar was the indication that (1) much duplication of effort is occuring among Colorado River modeling studies due to lack of information and (2) much of the knowledge now available on modeling is not being effectively applied to real problems. The overall …
Private Water Supplies, Maine Department Of Human Services
Private Water Supplies, Maine Department Of Human Services
Maine Collection
Private Water Supplies
Department of Human Services, Augusta, Me. (Reprinted 1976).
Contents: Introduction / General Requirements / Types of Private Water Supplies / Procurement of Safe Water / Distribution / Appendix A & B
Sensitivity Of Vertebrate Embryos To Heavy Metals As A Criterion Of Water Quality: Phase Iii: Use Of Fish And Amphibian Eggs As Bioindicator Organisms For Evaluating Water Quality, Wesley J. Birge, Albert G. Westerman, Jeffrey A. Black
Sensitivity Of Vertebrate Embryos To Heavy Metals As A Criterion Of Water Quality: Phase Iii: Use Of Fish And Amphibian Eggs As Bioindicator Organisms For Evaluating Water Quality, Wesley J. Birge, Albert G. Westerman, Jeffrey A. Black
KWRRI Research Reports
Fish and amphibian eggs, embryos and early posthatched (larval) stages were evaluated as bioindicator organisms with which to monitor the quality of natural water resources. Eggs of 9 species were cultured in water collected from each of 11 Inner Bluegrass rivers and streams. The latter were chosen to represent water sources varying in quality from extremely poor to good. Selection was based on the sources and magnitude of pollution, and the diversity and density of piscine populations. Cultures were maintained in vitro, using 12-hour changes of water.
Averaging data for all 9 animal species, egg hatchability (embryonic survival) ranged …
Blood And Tissue Identification Of Selected Birds And Mammals, Part Ii: Cross Reaction Patterns Of Birds And Mammals, Using Deer, Bovine, Raccoon, Chicken And Mallard Duck Antiserum, Part 1, David W. Oates, Debra L. Weigel
Blood And Tissue Identification Of Selected Birds And Mammals, Part Ii: Cross Reaction Patterns Of Birds And Mammals, Using Deer, Bovine, Raccoon, Chicken And Mallard Duck Antiserum, Part 1, David W. Oates, Debra L. Weigel
Other Publications in Wildlife Management
Most enforcement cases involving our laboratory deal with the identification of a blood stain or meat sample which is suspected to be deer. Determining whether it is, indeed, from deer is not difficult. But, if the sample is not deer, exact identification can prove to be a more time consuming and tedious process. To eliminate the need to obtain antiserum for each individual species and aid identification, we undertook an investigation on which species and the extent to which several species may cross react with antisera of some common birds and mammals, especially deer. Deer, cow, and raccoon were selected …
Blood And Tissue Identification Of Selected Birds And Mammals, Part Ii: Cross Reaction Patterns Of Birds And Mammals, Using Deer, Bovine, Raccoon, Chicken And Mallard Duck Antiserum, Part 5, David W. Oates, Debra L. Weigel
Blood And Tissue Identification Of Selected Birds And Mammals, Part Ii: Cross Reaction Patterns Of Birds And Mammals, Using Deer, Bovine, Raccoon, Chicken And Mallard Duck Antiserum, Part 5, David W. Oates, Debra L. Weigel
Other Publications in Wildlife Management
Part 5 (pp. 114-117) References Appendix
Blood And Tissue Identification Of Selected Birds And Mammals, Part Ii: Cross Reaction Patterns Of Birds And Mammals, Using Deer, Bovine, Raccoon, Chicken And Mallard Duck Antiserum, Part 2, David W. Oates, Debra L. Weigel
Blood And Tissue Identification Of Selected Birds And Mammals, Part Ii: Cross Reaction Patterns Of Birds And Mammals, Using Deer, Bovine, Raccoon, Chicken And Mallard Duck Antiserum, Part 2, David W. Oates, Debra L. Weigel
Other Publications in Wildlife Management
Part 2 (pp. 19-55) Protein Patterns: Birds (Figure 9)
The reproductions illustrate avian crossreaction patterns obtained from chicken antiserum and mallard duck antiserum, using immunoelectrophoresis and immuno diffusion. Table 1 summarizes immunoelectrophoresis cross-reactions. Species included in the study are:
BIRDS
Chicken Gallus gallus
Coot Fulica americana
Crow Corvus brachyrhynchos
Mourning Dove Zenaidura macoura
Mallard Duck Anas platyrhynchos
Golden Eagle Aquila chrysaetos
Snow Goose Chen hyperborea
Eared Grebe Podiceps caspicus
Red-tailed Hawk Buteo jamaicensis
Great Horned Owl Bubo virginianus
White Pelican pelecanus erythrorhynchos
Ring-necked Pheasant Phasianus colchicus
Pigeon Columba livia
Prairie Chicken Tympanuchus cupido
Bobwhite Quail Colinus virginianus
Merriam's Turkey Meleagris …
Comparison Of Economic Returns From Grain Crops, H M. Fisher
Comparison Of Economic Returns From Grain Crops, H M. Fisher
Journal of the Department of Agriculture, Western Australia, Series 4
While wheat is still generally the most profitable crop in Western Australia the relative profitability of barley and linseed has risen in the last few years; in southern areas they are likely to be at least as profitable as wheat.
Oats has fallen in profitability relative to wheat, and grain legumes have suffered a marked fall. Yields of these grains have increased with the introduction of new varieties but their price increases have not kept pace with those of wheat and barley. The present relationship of yields and costs indicates that substantial price changes will be needed to change the …
1976 Sunflower-Safflower Irrigated Variety Trial 1976-1977, G J. Parlevliet
1976 Sunflower-Safflower Irrigated Variety Trial 1976-1977, G J. Parlevliet
Experimental Summaries - Plant Research
In 1975/76 two varieties of sunflower, Hysun 10 and Hysun 20, as well as Safflower (Gila) were grown in a large alternative crop demonstration. Results were sufficiently good to warrant more and closer examination. This led to the present variety trial using varieties suggested by Mr. M. Poole. The aim was to evaluate six sunflower varieties and one safflower. The work was carried out in the light of reduced profitability of peas, beans and some fruit crops. This results in a number of growers having irrigation water and equipment under-employed. Other farmers are after a crop which will give them …
Use Of Stockpods For Nesting By Giant Canada Geese, Paul M. Bultsma
Use Of Stockpods For Nesting By Giant Canada Geese, Paul M. Bultsma
Electronic Theses and Dissertations
A study of giant Canada geese (Branta canadensis maxima) nesting on stockponds in western South Dakota was conducted during 1974 and 1975. Analysis of 10 selected variables at nests on natural sites indicated that distance of water below high water level and percent slope from wetland to horizon, contributed the most to the use of the site. Distance from wetland to horizon and disturbance factors were two important variables measured to determine use of artificial nesting structures. First nests were initiated on 1 April 1974 and 8 April 1975. Twenty-five nests (16 percent) were located on artificial nesting structures, and …
The Aquatic Ecology Of Two Seasonal Marshes In Eastern South Dakota, Walter K. Donaldson
The Aquatic Ecology Of Two Seasonal Marshes In Eastern South Dakota, Walter K. Donaldson
Electronic Theses and Dissertations
Zooplankton, benthos, nekton, aufwuchs, and the physical-chemical limnology of two seasonal marshes in eastern South Dakota were monitored from April-June 1975. Bothwell and Lund Marshes contained water from 15 April-July 1975. The dominant i. ons, Ca ++, Mg+ +, and sulfate, made the water hardness non-carbonate. Floating vegetation, Lemna trisulca and Cladophora sp., became abundant in both marshes during the first week of June, and formed large thick mats by the end of June 1975. Daphnia pulex was the dominant zooplankter in Bothwell Marsh and made up 33% of the zooplankton density during the 1975 season. The population was triacmic, …