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Articles 46591 - 46620 of 52496
Full-Text Articles in Physical Sciences and Mathematics
Outlook On Groundwater: Elementary, Nancy Lockett, Patricia Mead
Outlook On Groundwater: Elementary, Nancy Lockett, Patricia Mead
K-12 Curriculum Supplements
Table of Contents:
--- Forward
--- Activity 1: Life on Planet X
--- Activity 2: Dew Drop Inn
--- Activity 3: Water Magic
--- Activity 4: Drip Trip
--- Activity 5: Checking in at Aquifer Acres
--- Activity 6: Percolation Race
--- Activity 7: Checking Out of Aquifer Acres
--- Activity 8: What Goes Down, Comes Up!
--- Activity 9: Inspect That Drop
--- Activity 10: Old McDump's Farm
--- Activity 11: Pumps and Pipes
--- Activity 12: Who Dumped It?
--- Dilemmas
--- Glossary
Arkansas' Timber Resource: Yesterday, Today, And Tomorrow, Richard A. Kluender, R. L. Willett
Arkansas' Timber Resource: Yesterday, Today, And Tomorrow, Richard A. Kluender, R. L. Willett
Journal of the Arkansas Academy of Science
Demand for forest products continues to rise. Arkansas provides about 4% of the U.S. total forest production and about 12% of the south central region production. Questions exist about the ability of current forest resources to completely meet anticipated future demand. In 1985, the U.S. Forest Service and the Arkansas Timber Study Committee began to analyze the existing forest base to determine whether future demand could be met from the current forest, or if not, what management changes were needed to help meet future demand. In 1985, Arkansas forests covered approximately 48% of the total land area of the state. …
Distribution, Abundance, And Biomass Of Freshwater Mussels (Bivalvia: Unionidae) In Lake St. Clair, Thomas F. Nalepa, Jeffrey M. Gauvin
Distribution, Abundance, And Biomass Of Freshwater Mussels (Bivalvia: Unionidae) In Lake St. Clair, Thomas F. Nalepa, Jeffrey M. Gauvin
United States Department of Commerce: Staff Publications
A mussel population survey was conducted in Lake St. Clair with divers using SCUBA to sample at 29 stations throughout the lake. Mean abundance was 2 m-2 and mean biomass was 4.4 g dry wt m-2. Of the 18 species collected, Lampsilis radiata siliquoidea was by far the most abundant, accounting for 45% of all individuals. The age-frequency distribution of L. r. siliquoidea was dominated by individuals between 9 and 12 years old. In contrast, the second most abundant species, Leptodea fragilis, showed yearly variation in recruitment with no apparent trends in year class strength. Annual …
13.2.1. Waterfowl Use Of Wetland Complexes, Leigh H. Fredrickson, Frederic A. Reid
13.2.1. Waterfowl Use Of Wetland Complexes, Leigh H. Fredrickson, Frederic A. Reid
Waterfowl Management Handbook
Waterfowl are a diverse group of birds that have widely divergent requirements for survival and recruitment. Whistling-ducks, geese, and swans (Anserinae) and ducks (Anatinae) have contrasting life history requirements.
Several goose populations have expanded greatly despite extensive continental wetland losses and degradation. Most expanding populations nest in arctic areas where modifications or disturbance of nesting habitats have been minimal. These grazers often find suitable migratory and wintering habitats in terrestrial or agricultural environments. In contrast, ducks are less terrestrial and populations are influenced more by wetland characteristics, such as quality, total area of wetland basins, and size and configuration of …
13.3.1. Invertebrate Response To Wetland Management, Leigh H. Fredrickson
13.3.1. Invertebrate Response To Wetland Management, Leigh H. Fredrickson
Waterfowl Management Handbook
By gaining greater understanding and appreciation of wetland environments, managers have developed creative insights for waterfowl conservation. Among the most exciting new developments in the understanding of functional wetlands has been the recognition of the important roles of invertebrates in aquatic ecosystems. These roles include trophic linkage from primary production to secondary consumers such as waterfowl, packaging of specific nutritional components such as amino acids and micronutrients for vertebrate predators, and detrital processing of wetland organic material. Although specific invertebrate responses to various management techniques are not always predictable and may differ among invertebrate species, patterns related to water regimes, …
13.3.2. Initial Considerations For Sampling Wetland Invertebrates, Leigh H. Fredrickson, Frederic A. Reid
13.3.2. Initial Considerations For Sampling Wetland Invertebrates, Leigh H. Fredrickson, Frederic A. Reid
Waterfowl Management Handbook
As the importance of invertebrates to waterbird nutrition and detrital processing has become increasingly evident, the need for effective and efficient invertebrate sampling has grown. Identification of invertebrate responses to management requires sampling and selection of appropriate sampling equipment. Goals must be established according to qualitative or quantitative needs, organism characteristics, and wetland types. Management objectives often can be met by sampling specific invertebrates to index the effect of management rather than through long-term studies requiring large sample sizes and intensive effort. Certain wetland and invertebrate characteristics that should be considered when initiating invertebrate sampling are described below.
Outlook On Groundwater: Senior High, Bernard Hermanson, Joyce Meyers
Outlook On Groundwater: Senior High, Bernard Hermanson, Joyce Meyers
K-12 Curriculum Supplements
Table of Contents:
--- Forward
--- Activity 1: Beam Me Up, Soddy
--- Activity 2: The Quiet Pump
--- Activity 3: Buried Treasurer
--- Activity 4: Personally Perceived Million
--- Activity 5: (kon-tam-i-na'-shon)
--- Activity 6: Home - A Hazardous Waste Site?
--- Activity 7: D. B. Smirch (or Clean Up Your Aquifer)
--- Activity 8: It All Comes Out With the Wash
--- Activity 9: It's A Dirty Strain
--- Activity 10: Rate Your Water
--- Activity 11: Contamination Rummy
--- Activity 12: Whodunit?
--- Activity 13: Old Home Place (Modern Pioneers)
--- Activity 14: Agricultural Energy Management
--- …
Investigation Of Tributyltin: Water/Sediment Interactions, Michael A. Unger
Investigation Of Tributyltin: Water/Sediment Interactions, Michael A. Unger
Dissertations, Theses, and Masters Projects
Tributyltin (TBT) and its degradation products dibutyltin (DBT) and monobutyltin (MBT) have been quantitatively analyzed in environmental water samples using gas chromatography with flame photometric detection and gas chromatography/mass spectrometry (GC/MS). The butyltins were extracted from environmental samples with hexane/0.2% tropolone and derivatized with hexyl magnesium bromide to form hexylbutyltins. Full scanning GC/MS was used for confirmation of peak identifications and quantification was done by selective ion monitoring (methane chemical ionization) at m/z 319 (TBT) and m/z 347 (DBT, MBT and tripentyltin, the internal standard). Calibration curves were linear and detection limits were less than 2 ngL&\sp{lcub}-1{rcub}&. GC/MS and GC …
An Assessment Of Tributyltin Contamination In Sediments And Shellfish In The Chesapeake Bay, Francois A. Espourteille
An Assessment Of Tributyltin Contamination In Sediments And Shellfish In The Chesapeake Bay, Francois A. Espourteille
Dissertations, Theses, and Masters Projects
No abstract provided.
Availability Of Lead, Zinc, Copper, And Cadmium To The Peregrine Falcon (Falco Peregrinus) From Waterfowl Of The Craney Island Disposal Area, Douglas Stephen Davis
Availability Of Lead, Zinc, Copper, And Cadmium To The Peregrine Falcon (Falco Peregrinus) From Waterfowl Of The Craney Island Disposal Area, Douglas Stephen Davis
Dissertations, Theses, and Masters Projects
No abstract provided.
Response Of Fish Communities To Habitat Alteration In A Small Ozark Stream, Danny J. Ebert, Stephen P. Filipek
Response Of Fish Communities To Habitat Alteration In A Small Ozark Stream, Danny J. Ebert, Stephen P. Filipek
Journal of the Arkansas Academy of Science
From 1984 to 1986, the Arkansas Highway and Transportation Department reconstructed and upgraded a portion of St. Hwy. 123 west of St. Hwy.7 at Pelsor, Arkansas. As a result of the construction, portions of Haw Creek, Johnson County, Arkansas, a third order stream in the Boston Mountains Ecoregion, were straightened and channelized. In reconstructing specific stream reaches, stream banks were riprapped and vegetated, gabions constructed and positioned, stream substrates and pool-riffle ratios altered. Instream and riparian habitat and fish biomass and diversity in altered reaches were radically altered. Channelized reaches became wide and shallow, lacking overstory cover and pools. Substrate …
The Effects Of Salinity On Cadmium Toxicity To The Bay Mysid, Mysidopsis Bahia Molenock, Peter F. De Lisle
The Effects Of Salinity On Cadmium Toxicity To The Bay Mysid, Mysidopsis Bahia Molenock, Peter F. De Lisle
Dissertations, Theses, and Masters Projects
The effects of salinity on cadmium toxicity to the bay mysid, Mysidopsis bahia Molenock were studied in a series of experiments examining salinity tolerance, effect of salinity on intermolt period, osmoregulatory capacity, interaction of salinity with acute cadmium toxicity, role of changes in cadmium speciation, modification due to calcium antagonism and effects of cadmium on osmoregulatory ability. Upper and lower tolerance limits increased with increasing acclimation salinity. Intermolt duration decreased slightly with increasing salinity. Mysidopsis bahia osmoregulates at salinities from 5 to 37&\perthous& and exhibits an isosmotic point of 24&\perthous&. Hemolymph osmolality attained steady-state condition by 95 min post-transfer to …
Carbon Dioxide Emissions And Fossil Fuel Consumption A Canadian Perspective, John Peter Doucet
Carbon Dioxide Emissions And Fossil Fuel Consumption A Canadian Perspective, John Peter Doucet
Theses and Dissertations (Comprehensive)
The potential climate change due to increased loading of carbon dioxide in the atmosphere has emerged as one of the most significant environmental threats of the late twentieth century. An analysis of a variety of feasible energy demand scenarios for Canada indicates that if we continue to consume the same types and proportions of fuels as we do today, the expected demand for energy in the year 2005 would yield carbon dioxide emissions up to 52.5 per cent greater than that of 1985. On the other hand, if Canada were to alter the types and quantities of fuels required to …
Predicting Potential Aluminum Contamination Of Surface And Ground Waters From Acid Sulfate Enriched Drainages Emanating From Low Neutralization Capacity Watersheds, Anastasios D. Karathanasis, Vasilios P. Evangelou, Y. L. Thompson
Predicting Potential Aluminum Contamination Of Surface And Ground Waters From Acid Sulfate Enriched Drainages Emanating From Low Neutralization Capacity Watersheds, Anastasios D. Karathanasis, Vasilios P. Evangelou, Y. L. Thompson
KWRRI Research Reports
The composition of soil solutions and surface waters emanating from unreclaimed, or partially reclaimed, strip-mined watersheds with low buffering capacity in Kentucky were compared with soil solution compositions of unaffected strata in the watershed. The data suggest that almost 20 years after mining, most soil solutions and surface waters of the disturbed areas still contain high levels of dissolved Al, controlled primarily by the solubilities of a jurbanite-like mineral (upper limit) and alunite (lower limit). Soluble Al in solutions of undisturbed areas was consistent with the solubility of kaolinite or gibbsite. The absence of jurbanite x-ray diffraction peaks suggested the …
Recalibration Of Pagan River Water Quality Model, Albert Kuo, Gamble M. Sisson, Bruce J. Neilson
Recalibration Of Pagan River Water Quality Model, Albert Kuo, Gamble M. Sisson, Bruce J. Neilson
Reports
Two water quality models of the Pagan River were developed in the 1970s by the Virginia Institute of Marine Science. The first model was developed under the CSA (cooperative state agencies) program (Kuo, Lewis and Fang, 1976). It simulated the oxidation of organic matter and the effect that, and reaeration, had on the dissolved oxygen regime of the river. The model included four water quality parameters: salinity, dissolved oxygen, carbonaceous oxygen demand and nitrogenous oxygen demand. A later model, developed as part of the Hampton Roads 208 studies, was an expansion of the first one. It included the nitrogen and …
Analysis Of Effluents And Associated Sediments And Tissue For Toxic Organic Compounds, 1987-1988 : Final Report To Virginia State Water Control Board, Robert Hale, Craig L. Smith
Analysis Of Effluents And Associated Sediments And Tissue For Toxic Organic Compounds, 1987-1988 : Final Report To Virginia State Water Control Board, Robert Hale, Craig L. Smith
Reports
Effluent and sediment samples were collected from 30 point source discharge sites within tributaries to the Chesapeake Bay, and analyzed for the presence of toxic organic compounds. The facilities selected included: municipal treatment plants, oil refining and storage operations, shipyards, military bases, paper companies, electrical power generators and various other manufacturing enterprises. In addition to sediment, shellfish were collected from the receiving streams. Unfortunately, environmental conditions in the vicinity of many of the facilities were unsatisfactory for the long-term survival of shellfish. As a consequence their availability was limited. ....
Integrating Tributary Groundwater Development Into The Prior Appropriation System: The South Platte Experience, Lawrence J. Macdonnell, University Of Colorado Boulder. Natural Resources Law Center, Colorado Water Resources Research Institute
Integrating Tributary Groundwater Development Into The Prior Appropriation System: The South Platte Experience, Lawrence J. Macdonnell, University Of Colorado Boulder. Natural Resources Law Center, Colorado Water Resources Research Institute
Books, Reports, and Studies
46 p. : ill., maps ; 28 cm
The Governmental Context For Natural Resources Development In Indian Country, Susan M. Williams, University Of Colorado Boulder. Natural Resources Law Center
The Governmental Context For Natural Resources Development In Indian Country, Susan M. Williams, University Of Colorado Boulder. Natural Resources Law Center
Books, Reports, and Studies
22 p. ; 28 cm
Water And The American West: Essays In Honor Of Raphael J. Moses, David H. Getches
Water And The American West: Essays In Honor Of Raphael J. Moses, David H. Getches
Books, Reports, and Studies
This digital resource contains only an abstract, cover image and table of contents information from the published book.
Print copy of book is available in the University of Colorado’s Wise Law Library: http://lawpac.colorado.edu/record=b131940~S0
Contents: Foreword / [David H. Getches] -- Biographical note : a tribute to a great lawyer / John M. Sayre -- To settle a new land : an historical essay on water law in Colorado and in the American West / Charles F. Wilkinson -- A global perspective on western water / Gilbert F. White -- The international problem with Mexico over the salinity of the lower …
1988 File Geodatabase Containing Photo Point Locations, Aerial Photos, And Flight Maps, City Of Tampa Department Of Sanitary Sewers Bay Study Group, Pete Reehling, Richard Mckenzie
1988 File Geodatabase Containing Photo Point Locations, Aerial Photos, And Flight Maps, City Of Tampa Department Of Sanitary Sewers Bay Study Group, Pete Reehling, Richard Mckenzie
Data Sets
The Bay Study Group was created by the City of Tampa in 1976 to monitor the effects of pollution abatement that occurred in Hillsborough Bay when the city’s wastewater treatment plant was upgraded from primary to advanced treatment in 1979. The Bay Study Group documented a remarkable restoration of water quality parameters and biological indicators in Hillsborough Bay from the mid 1980s until 2009, when it was disbanded. This zip Geodatabase file contains the photo point locations, aerial photos, and flight maps for the year 1988.
Extended Maritime Jurisdiction And Indonesian Fisheries Development, Hardjono
Extended Maritime Jurisdiction And Indonesian Fisheries Development, Hardjono
Marine Affairs Theses and Major Papers
With the declaration of the Indonesian EEZ by Presidential Decree on 21 March 1980, Indonesia has acquired a vast area of approximately 5.8 million sq. km. of sea water and opportunity to manage and utilize fisheries resources in the new extended areas of jurisdiction. The EEZ is giving many more potential fishing resources and greater opportunities to exploit its available fishery resources with responsibilities to conserve the resources. By exercising a high degree of its authority within the EEZ, Indonesia can gain more benefits from the use of fishery resources than before the declaration. However, the benefits may not be …
The Impact Of Public Policy On Portland's Waterfront, John G. Ferland
The Impact Of Public Policy On Portland's Waterfront, John G. Ferland
Marine Affairs Theses and Major Papers
In May, 1987, Portland voters approved by a 2-to-1 margin a referendum preventing non-marine development along its waterfront for at least five years. It has become clear that the vote was not just a Portland waterfront issue. To many, the vote was a statement of no confidence in growth regulations and unhappiness with the pace of development throughout the Greater Portland region. The vote illustrated that there is no consensus on Greater Portland's future. For Portland's waterfront, a lack of consensus is nothing new. Portland has debated waterfront policy in fits and starts for most of the 20th century. As …
Dredging Management: A Comparative Analysis Of Mid-Sized U.S. North Atlantic Ports, Matthew H. Masters
Dredging Management: A Comparative Analysis Of Mid-Sized U.S. North Atlantic Ports, Matthew H. Masters
Marine Affairs Theses and Major Papers
Dredging management within the states of Rhode Island, Maine and Connecticut is examined through an analysis of the ports of Providence, Portland, and New Haven. These ports were selected from a field of 30 Atlantic Coast ports through a multivariate statistical analysis, based on similarities in size, function and geography. Each port's dredging history was compiled to illustrate the frequency and magnitude of dredging activity among the three states. Pertinent state laws, regulations and policies regarding dredging and dredged material disposal were reviewed in an attempt to identify similarities and differences. It was believed that differences among each state's regulatory …
The Relationship Between Perceptions Of Gentrification And Waterfront Revitalization Policies, Noreen Merainer
The Relationship Between Perceptions Of Gentrification And Waterfront Revitalization Policies, Noreen Merainer
Marine Affairs Theses and Major Papers
This thesis examines the waterfront revitalization experience in Jersey City, N.J. In particular, the issue of gentrification, as perceived by the city administration, was examined to determine its impact on current city policies. A direct relationship between perceptions of gentrification and waterfront revitalization policies is suggested based on data obtained from detailed interviews and city documents.
Enforcement Of State Coastal Resources Management Regulations: The Rhode Island Coastal Resources Management Council, David W. Kaiser
Enforcement Of State Coastal Resources Management Regulations: The Rhode Island Coastal Resources Management Council, David W. Kaiser
Marine Affairs Theses and Major Papers
This paper examines the adequacy of the enforcement efforts of the Rhode Island Coastal Resources Management Council (CRMC) in carrying out the rules and regulations of the Rhode Island Coastal Resources Management Program (CRMP). This analysis describes the Federal and State mandates and contributions to the enforcement of the Rhode Island CRMP, determines the legitimacy of the CRMC through Superior Court cases, examines CRMC enforcement activities, and determines the compliance to CRMC cease and desist orders. The research finds that the CRMC has not enforced its regulatory responsibilities well. Actual compliance to cease and desist orders was only 41%. It …
The Dynamic Balance Between Experts And The Public In The Assessment Of Hazards: Ocean Incineration - The U.S. Experience, Sally J. Spadaro
The Dynamic Balance Between Experts And The Public In The Assessment Of Hazards: Ocean Incineration - The U.S. Experience, Sally J. Spadaro
Marine Affairs Theses and Major Papers
Understanding environmental threats posed as a byproduct of technology has become an important role for our federal governmental agencies. This study examined environmental hazard assessment in theory and in practice. Discussion established the unique nature of environmental hazard assessment as compared to financial or natural hazard assessment. This first section examined advantages and shortcomings of four methods to judge the tolerability of environmental hazards: Natural Baselines, Risk/Cost/Benefit Analysis, Revealed Preferences, and Expressed Preferences. The differences in perspectives between expert risk assessors and the lay public was highlighted. For the case of ocean incineration of hazardous wastes the dilemma faced by …
An Analysis Of Offshore Safety During Oil And Gas Operations On The Outer Continental Shelf, James H. Collins
An Analysis Of Offshore Safety During Oil And Gas Operations On The Outer Continental Shelf, James H. Collins
Marine Affairs Theses and Major Papers
Trends in offshore fatalities and lost time accidents since the Outer Continental Shelf Lands Act Amendments of 1978 need to be identified to allow an evaluation of the safety of offshore operations. Fatality and accident data between 1975 and 1985 are analyzed in the context of the Federal regulatory structure. The safety data generated for oil and gas drilling operations on the Outer Continental Shelf varies according to the source of the information. Modifications to accident reporting formats and data collection systems would benefit the offshore industry and the Government regulators in their efforts to improve operational safety. A major …
Bibliographie Pflanzen Soziologischer Arbeiten Über Die Mongolische Volksrepublik. Folge 2, Werner Hilbig
Bibliographie Pflanzen Soziologischer Arbeiten Über Die Mongolische Volksrepublik. Folge 2, Werner Hilbig
Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298
Zusammenfassung
Der vorliegende Teil 2 einer Bibliographie pflanzensoziologischer und vegetationsökologischer Arbeiten über das Gebiet der Mongolischen Volksrepublik (MVR) enthält im wesentlichen Arbeiten aus den Jahren 1980-1985. Es werden 201 Arbeiten zitiert.
Summary
The second part of the bibliography of geobotanical and synecological publications about the territory of the Mongolian People's Republic contains publications mainly from 1980 till 1985. 201 papers are quoted.
An Inventory And Condition Survey Of Rangelands In The Ashburton River Catchment, Western Australia, A A. Mitchell, A L. Payne, W F. Holman
An Inventory And Condition Survey Of Rangelands In The Ashburton River Catchment, Western Australia, A A. Mitchell, A L. Payne, W F. Holman
Technical Bulletins
The inventory and condition survey of rangelands in the Ashburton River catchment, undertaken by the Department of Agriculture and Food, Western Australia (DAFWA) between 1976 and 1978, describes and maps the natural resources of the region’s pastoral leasehold land. This survey report provides a baseline record of the existence and condition of the natural area’s resources, to assist with the planning and implementation of land management practices. The report identified and described the condition of soils, landforms, vegetation, habitat, ecosystems, and declared plants and animals. It also assessed the impact of pastoralism and made land management recommendations. The area surveyed …
Cropstatus--A Computer Program To Assess The Effects Of Seasonal Weather Changes On Nebraska's Agriculture, R. E. Neild, Donald A. Wilhite, K. G. Hubbard
Cropstatus--A Computer Program To Assess The Effects Of Seasonal Weather Changes On Nebraska's Agriculture, R. E. Neild, Donald A. Wilhite, K. G. Hubbard
Drought Mitigation Center: Faculty Publications
CROPSTATUS is a series of programs residing in Nebraska's AGNET system using daily weather data to assess seasonal changes in crops, livestock, and other agricultural conditions. Assessments are based on parameters developed from accumulations of current daily temperature and precipitation data collected from a network of synoptic, climate, and automated micrometeorological stations in Nebraska in comparison with daily normals. The daily normals were derived from monthly summaries using multiple regression models to compute daily values as a function of Julian day numbers. Crop phenology models based on growing degree days were used to monitor and forecast the progress of different …