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Articles 49981 - 50010 of 52392
Full-Text Articles in Physical Sciences and Mathematics
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 …
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.
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 …
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 …
Hydrologic Impact Of Burning And Grazing On A Chained Pinyon-Juniper Site In Southeastern Utah, Gerald F. Gifford, John C. Buckhouse, Frank E. Busby
Hydrologic Impact Of Burning And Grazing On A Chained Pinyon-Juniper Site In Southeastern Utah, Gerald F. Gifford, John C. Buckhouse, Frank E. Busby
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 …
Distribution Of Microorganisms In Desert Soil, A. T. Vollmer, S. A. Bamberg
Distribution Of Microorganisms In Desert Soil, A. T. Vollmer, S. A. Bamberg
Memorandum
No abstract provided.
Primary Production And Carbon Allocation In Creosotebush: The Effect Of Carbohydrate Levels On Dark Co2 Release, G. L. Cunningham, J. P. Syvertsen
Primary Production And Carbon Allocation In Creosotebush: The Effect Of Carbohydrate Levels On Dark Co2 Release, G. L. Cunningham, J. P. Syvertsen
Memorandum
No abstract provided.
Effects Of Rodents Of Germination Of Desert Annuals, O.J. Reichman
Effects Of Rodents Of Germination Of Desert Annuals, O.J. Reichman
Memorandum
No abstract provided.
Responses And Interactions In Desert Plants As Influenced By Irrigation And Nitrogen Applications, R.B. Hunter, E. M. Romney, A. Wallace, H.O. Hill, T.A. Ackerman, J.E. Kinnear
Responses And Interactions In Desert Plants As Influenced By Irrigation And Nitrogen Applications, R.B. Hunter, E. M. Romney, A. Wallace, H.O. Hill, T.A. Ackerman, J.E. Kinnear
Memorandum
No abstract provided.
Rock Valley Validation Site Report, F. B. Turner
Biology Of Nematodes In Desert Ecosystems, D. W. Freckman, R. Mankau
Biology Of Nematodes In Desert Ecosystems, D. W. Freckman, R. Mankau
Memorandum
No abstract provided.
Jornada Validation Site Report, W. G. Whitford
Responses And Interactions In Desert Plants As Influenced By Irrigation And Nitrogen Application, R. B. Hunter, E. M. Romney, A. Wallace, H. O. Hill, T. A. Ackerman, J. E. Kinnear
Responses And Interactions In Desert Plants As Influenced By Irrigation And Nitrogen Application, R. B. Hunter, E. M. Romney, A. Wallace, H. O. Hill, T. A. Ackerman, J. E. Kinnear
Memorandum
No abstract provided.
Plant Food Preferences Of Two Sympatric Rodents And Their Potential Impact On A Great Basin Shrub Community, E. L. Becker Ii, D. F. Balph
Plant Food Preferences Of Two Sympatric Rodents And Their Potential Impact On A Great Basin Shrub Community, E. L. Becker Ii, D. F. Balph
Memorandum
No abstract provided.
Effects Of Rodents On Germination Of Desert Annuals, O. J. Reichman
Effects Of Rodents On Germination Of Desert Annuals, O. J. Reichman
Memorandum
No abstract provided.
Jornada Validation Site Report, W.G. Whitford
Primary Production And Carbon Allocation In Creosotebush: The Effect Of Leaf Age On Net Gas Exchange Capacity, J. P. Syvertsen, G. L. Cunningham
Primary Production And Carbon Allocation In Creosotebush: The Effect Of Leaf Age On Net Gas Exchange Capacity, J. P. Syvertsen, G. L. Cunningham
Memorandum
No abstract provided.
Curlew Valley Validation Site Report, J. A. Macmahon
Biology Of Nematodes In Desert Ecosystems, D.W. Freckman, R. Mankau
Biology Of Nematodes In Desert Ecosystems, D.W. Freckman, R. Mankau
Memorandum
No abstract provided.
Factors Contributing To Production And Distribution Of Chihuahuan Desert Annuals, P. D. Whitson
Factors Contributing To Production And Distribution Of Chihuahuan Desert Annuals, P. D. Whitson
Memorandum
No abstract provided.
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
Memorandum
No abstract provided.
Programming Phase Of Water Response Ecosystem Model: I. Introduction And Support Programs, P. W. Lommen
Programming Phase Of Water Response Ecosystem Model: I. Introduction And Support Programs, P. W. Lommen
Memorandum
No abstract provided.
Demographic Studies Of Sagebrush Insects As Functions Of Various Environmental Factors, T.H. Hsiao, A.K. Temte
Demographic Studies Of Sagebrush Insects As Functions Of Various Environmental Factors, T.H. Hsiao, A.K. Temte
Memorandum
No abstract provided.
Growth Of Perennials In Response To Varying Moisture And Defoliation Regimes, J. A. Macmahon, B. E. Norton, B. M. Capen
Growth Of Perennials In Response To Varying Moisture And Defoliation Regimes, J. A. Macmahon, B. E. Norton, B. M. Capen
Memorandum
No abstract provided.
Phenology And Function Of Sonoran Desert Annuals In Relation To Environmental Changes, D. T. Patten, W. L. Mckenzie
Phenology And Function Of Sonoran Desert Annuals In Relation To Environmental Changes, D. T. Patten, W. L. Mckenzie
Memorandum
No abstract provided.
Tucson Basin Validation Site Report, J.L. Thames
Plant Demographic Studies Of Desert Annual Communities In Northern Utah Dominated By Non-Native Weedy Species, D. R. Duba, B. E. Norton
Plant Demographic Studies Of Desert Annual Communities In Northern Utah Dominated By Non-Native Weedy Species, D. R. Duba, B. E. Norton
Memorandum
No abstract provided.
Estimation Of Functional Root Biomass And Root And Shoot Response Of Atriplex Confertifolia To Summer Rain, K. C. Hodgkinson, P. S. Johnson, B. E. Norton
Estimation Of Functional Root Biomass And Root And Shoot Response Of Atriplex Confertifolia To Summer Rain, K. C. Hodgkinson, P. S. Johnson, B. E. Norton
Memorandum
No abstract provided.
Plant Growth And Water Transfer Interactive Processes Under Desert Conditions, D. D. Evans, T. W. Sammis, J. Ben Asher
Plant Growth And Water Transfer Interactive Processes Under Desert Conditions, D. D. Evans, T. W. Sammis, J. Ben Asher
Memorandum
No abstract provided.