Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Environmental Sciences

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 5131 - 5160 of 5814

Full-Text Articles in Entire DC Network

Assessing The Effectiveness Of Watershed Initiatives: The Current State Of Knowledge, Douglas S. Kenney, University Of Colorado Boulder. Natural Resources Law Center Jan 2000

Assessing The Effectiveness Of Watershed Initiatives: The Current State Of Knowledge, Douglas S. Kenney, University Of Colorado Boulder. Natural Resources Law Center

Books, Reports, and Studies

23 p. ; 28 cm


Resource Law Notes Newsletter, No. 48, Winter Issue, Jan. 2000, University Of Colorado Boulder. Natural Resources Law Center Jan 2000

Resource Law Notes Newsletter, No. 48, Winter Issue, Jan. 2000, University Of Colorado Boulder. Natural Resources Law Center

Resource Law Notes: The Newsletter of the Natural Resources Law Center (1984-2002)

No abstract provided.


Asian Carp Management And Control Workshop Jan 2000

Asian Carp Management And Control Workshop

National Invasive Species Council

The U.S. Fish & Wildlife Service’s Columbia Fishery Resources Office and Region 6 Aquatic Nuisance Species Coordinator co-hosted an Asian Carp Workshop in St. Louis, Missouri on April 19-20, 2000 to initiate the process of gathering input for the development of a Mississippi River Basin Asian Carp Management and Control Plan. The goal of the workshop was to review status, distribution, biology; ecological and economic benefits and impacts of four Asian carp species and identify management and control alternatives to reduce or mitigate these impacts.

Fifty-eight participants from state and federal natural resources agencies, universities and research facilities along with …


Improved Land Management In The Lake Victoria Basin: Linking Land And Lake, Research And Extension, Catchment And Lake Basin, Keith Shepherd, Markus Walsh, Fridah Mugo, Chin Ong, Tina Svan-Hansen, Brent Swallow, Alex Awiti, Mwangi Hai, David Nyantika, David Ombalo, Martin Grunder, Francis Mbote, David Mungai Jan 2000

Improved Land Management In The Lake Victoria Basin: Linking Land And Lake, Research And Extension, Catchment And Lake Basin, Keith Shepherd, Markus Walsh, Fridah Mugo, Chin Ong, Tina Svan-Hansen, Brent Swallow, Alex Awiti, Mwangi Hai, David Nyantika, David Ombalo, Martin Grunder, Francis Mbote, David Mungai

East Africa Institute

Lake Victoria is of immense economic and environmental importance in the eastern and central African region. The lake is the largest freshwater body in the tropics and its basin supports one of the densest and poorest rural populations in the world. About 21 million people rely primarily on subsistence agricultural and pastoral production for their livelihoods. But pervasive poverty has hindered sustainable use of the land resources and there has already been considerable land degradation. There is little doubt that sedimentation and nutrient run-off, urban and industrial point source pollution and biomass burning, have induced the rapid eutrophication of Lake …


Multibeam Sonar Backscatter Lineaments And Anthropogenic Organic Components In Lacustrine Silty Clay, Evidence Of Shipping In Western Lake Ontario, C F Michael Lewis, L A. Mayer, Prasanta K. Mukhopadhyay, Michael A. Kruge, John P. Coakley, M D. Smith Jan 2000

Multibeam Sonar Backscatter Lineaments And Anthropogenic Organic Components In Lacustrine Silty Clay, Evidence Of Shipping In Western Lake Ontario, C F Michael Lewis, L A. Mayer, Prasanta K. Mukhopadhyay, Michael A. Kruge, John P. Coakley, M D. Smith

Department of Earth and Environmental Studies Faculty Scholarship and Creative Works

A multibeam sonar survey (95 kHz) covering more than 500 km2 of western Lake Ontario revealed anomalous lineaments of relatively high backscatter. The lineaments did not align with or parallel the most prominent structural zones beneath the lake as expected. Instead, the principal lineaments lay on lines between ports on opposite sides of the lake, especially between Toronto and Welland Canal, and Toronto and Niagara River mouth. As the lineaments underlie current and historical shipping routes used during the steamship era, they are interpreted as an acoustic response to shipping debris cumulated in the near-surface bottom sediment. An exploratory …


An Integrated Fire Ecology Curriculum For The Eastern Slopes Of The Cascade Mountain Range For Grades 4-7, Amy E. Starkovich Jan 2000

An Integrated Fire Ecology Curriculum For The Eastern Slopes Of The Cascade Mountain Range For Grades 4-7, Amy E. Starkovich

All Graduate Projects

The purpose of this project was to create a curriculwn to increase the opportunity for young people in Central Washington to receive fire ecology education which will allow them to gain fundamental knowledge of how the Central Washington forest ecosystems work as well as develop a sense of stewardship toward our local forests. An integrated fire ecology curriculum aligned with the Washington State Essential Academic Learning Requirements was created. The curriculum includes teacher and student information, lessons, activities, resources, and recommendations to increase student understanding of the wildfires which impact many communities in Central Washington every summer.


Conservation In A Highly Fragmented Landscape: The Central Tallgrass Prairie Ecoregional Conservation Plan, The Central Tallgrass Prairie Ecoregion Planning Team Jan 2000

Conservation In A Highly Fragmented Landscape: The Central Tallgrass Prairie Ecoregional Conservation Plan, The Central Tallgrass Prairie Ecoregion Planning Team

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

With the adoption of Conservation by Design in 1995, The Nature Conservancy recognized the importance of working at larger scales to achieve our mission which is: the long-term survival of all viable native species and community types through the design and conservation of portfolios of sites within ecoregions. The Conservancy set forth to design conservation plans on an ecoregional basis by working closely with various conservation partners. These plans are intended to provide a framework within which the Conservancy and our partners, such as the Natural Heritage Programs, can make decisions regarding conservation actions to be taken at the …


Dating Marine Terraces With Relative-Age And Correlated-Age Methods, Daniel R. Muhs Jan 2000

Dating Marine Terraces With Relative-Age And Correlated-Age Methods, Daniel R. Muhs

United States Geological Survey: Staff Publications

Coastal landforms, and particularly emergent marine terraces, a re amongt he most importantg eomorphicfe aturesi n studieso f Quaternarys eal evel fluctuationsa nd neotectonics. A general model, first articulated by Alexander (1953) and borne out by detailedr ecent studieso n many coastlinesi,s that emergent flights of erosional terraces and coral reefs (Fig. 1) are the resulto f glacioeustaticallyc ontrolledf luctuations of global sea level superimposed on steady uplift. Similiarity of U-series ages of coral from both constructional reefsi n the tropicsa nd erosionalt erracesi n midlatitudesh as provided a rigorous test of this model (Mesolella and others, 1969; Bloom and …


Biogeography Of A Changing Landscape: Pipidinny Swamp, Yanchep National Park Western Australia, Bradley W. Boucher Jan 2000

Biogeography Of A Changing Landscape: Pipidinny Swamp, Yanchep National Park Western Australia, Bradley W. Boucher

Theses : Honours

The resources of Pipidinny Swamp were utilised by the Nyoongar Aboriginal people for possibly 40,000 years. Since the late 1800s, the resources of Pipidinny Swamp were used by non-Indigenous settlers. More recently, the wetland was incorporated in the Yanchep National Park in 1991.This study sought to reconstruct the changes to the natural and cultural environments within the wetland to provide background knowledge for the management board of the Park. Field investigations abo demonstrated the dynamic state of the wetland over a six-month period between low water (Feb-Apr) and high water (Aug-Oct) by monitoring the groundwater system, the vegetation system, and …


The Growth And Distribution Of The Green Alga Cladophora At Presqu'ile Provincial Park: Implications For Management (Ontario), Dolf Craig Dejong Jan 2000

The Growth And Distribution Of The Green Alga Cladophora At Presqu'ile Provincial Park: Implications For Management (Ontario), Dolf Craig Dejong

Theses and Dissertations (Comprehensive)

The Green alga genus Caldophora is one of the most abundant kinds of algae worldwide, found in both freshwater and marine environments. It prefers nutrient-rich waters and requires a rocky substrate and water movement for growth. When water temperatures reach 22 to 26 C, the alga dies and washes into shore in large mats. Dead Cladophora produces a terrible odour, reduces property values and can alter the taste of drinking water. At Presqu’ile Provincial Park, maximum Cladophora sloughing occurred July 22 1999, the same time as peak summer park visitation begins. This results in the fouling of the Park’s beaches …


Bulletin 4446 - Ord Land And Water Management Plan 2000, Agriculture Western Australia, Community Of Kununurra Jan 2000

Bulletin 4446 - Ord Land And Water Management Plan 2000, Agriculture Western Australia, Community Of Kununurra

Bulletins 4000 -

The wise use of the land and water of the Ord has become an imperative driven by increasing awareness of the impacts of current uses on ground water and the on the quality of the Ord River itself.

We have been lucky as a community that these resources are still in reasonable order and that we have the time to address the resource management challenges associated with our use of them. There is a wide range of land and water management issues to be addressed and all those involved have responsibilities to address some of those issues.


Geomorphometry – Diversity In Quantitative Surface Analysis, Richard J. Pike Jan 2000

Geomorphometry – Diversity In Quantitative Surface Analysis, Richard J. Pike

United States Geological Survey: Staff Publications

A widening variety of applications is diversifying geomorphometry (digital terrain modelling), the quantitative study of topography. An amalgam of earth science, mathematics, engineering and computer science, the discipline has been revolutionized by the computer manipulation of gridded terrain heights, or digital elevation models (DEMs). Its rapid expansion continues. This article reviews the remarkable diversity of recent morphometric work in 15 selected topics and discusses their significance and prospects. The quantitative analysis of industrial microsurface topography is introduced to the earth science community. The 14 other topics are Internet access to geomorphometry; global DEMs; DEM modelling of channel networks; …


The Management Of Complex Sociobiophysical Systems: Ecosystem-Based Management And The Chesapeake Bay Program, Daniel Dennis Mccarthy Jan 2000

The Management Of Complex Sociobiophysical Systems: Ecosystem-Based Management And The Chesapeake Bay Program, Daniel Dennis Mccarthy

Theses and Dissertations (Comprehensive)

There are an entire class of entities for which conventional scientific understanding is necessary but not sufficient to comprehend. These entities are too complex for analysis and yet too organized for statistics. They exist in a dynamic balance between the ordered and the disordered. They are ecosystems and human institutions. They are complex systems. There is an emerging body of theory that is providing insight into the structures and dynamics that underlie such entities. Under the rubric of complex systems theory, catastrophe theory, chaos theory, hierarchy theory and the interrelated theories of self-organization have profound implications for the way understand …


Killbear Provincial Park: The Beach And Dunes, Their Use And The Implications For Management (Ontario), Kathryn Ann Parlee Jan 2000

Killbear Provincial Park: The Beach And Dunes, Their Use And The Implications For Management (Ontario), Kathryn Ann Parlee

Theses and Dissertations (Comprehensive)

Beaches, and in particular sand dunes, are extremely fragile environments, easily altered by human activities. Intensive use of the beach/dune complex at Killbear Provincial Park near Parry Sound, Ontario may have led to the severe degradation of its dune system within Kilcoursie Bay. At present the dunes have been degraded back to an embryonic state, and as a result it is necessary to consider the development of management strategies before the system is completely destroyed. In order to develop effective management strategies however, it is necessary to understand how the natural process of the system work and the specific effects …


Identifying Areas Of Concern For Regional Cumulative Effects Assessments In And Around Northern National Parks In Canada (Yukon), Jennifer L. Lenton Jan 2000

Identifying Areas Of Concern For Regional Cumulative Effects Assessments In And Around Northern National Parks In Canada (Yukon), Jennifer L. Lenton

Theses and Dissertations (Comprehensive)

This thesis uses a literature review of protected areas selection, park management, comprehensive regional land use planning, and cumulative environmental effects and assessment to develop a methodology that identifies areas with concentrations of social and/or ecological values in and around northern national parks. The proposed methodology involves two stages. First, a database of values is developed by taking an inventory of social and ecological values through exxtensive literature reviews, interviews, and consultation with the public. This database is then used in the second step to determine areas with concentrations of social and/or ecological values, or “value hotspots”, using a series …


Variability In Winter Mass Balance Of Northern Hemisphere Glaciers And Relations With Atmospheric Circulation, Gregory J. Mccabe, Andrew G. Fountain, Mark Dyurgerov Jan 2000

Variability In Winter Mass Balance Of Northern Hemisphere Glaciers And Relations With Atmospheric Circulation, Gregory J. Mccabe, Andrew G. Fountain, Mark Dyurgerov

Geography Faculty Publications and Presentations

An analysis of variability in the winter mass balance (WMB) of 22 glaciers in the Northern Hemisphere indicates two primary modes of variability that explain 46% of the variability among all glaciers. The first mode of variability characterizes WMB variability in Northern and Central Europe and the second mode primarily represents WMB variability in northwestern North America, but also is related to variability in WMB of one glacier in Europe and one in Central Asia. These two modes of WMB variability are explained by variations in mesoscale atmospheric circulation which are driving forces of variations in surface temperature and precipitation. …


Black-Tailed Deer Habitat Changes In A Portion Of The Mount St. Helens Blast Zone, Ronald W. Davis Dec 1999

Black-Tailed Deer Habitat Changes In A Portion Of The Mount St. Helens Blast Zone, Ronald W. Davis

All-Inclusive List of Electronic Theses and Dissertations

This study utilized Landsat TM imagery to evaluate black-tailed deer habitat changes in a portion of the Mount Saint Helens blast zone in western Washington. The purpose of this study was to compare the post eruption vegetation changes with population trends for black tailed deer. The 55,000-acre study area comprises a Washington Department of Game Management unit (GMU 524) located to the northnorthwest of Mount St. Helens. Approximately 80% ofthe mostly forested study area was affected by lateral blast from the 1980 eruption. The area is predominantly private land managed for timber production but a small portion falls within the …


Vol. 22 No. 3-4 (1999): Pacific Studies Full Issue, The Jonathan Nāpela Center For Hawaiian And Pacific Islands Studies Dec 1999

Vol. 22 No. 3-4 (1999): Pacific Studies Full Issue, The Jonathan Nāpela Center For Hawaiian And Pacific Islands Studies

Pacific Studies

Pacific Studies is published two times a year by The Jonathan Nāpela Center for Hawaiian and Pacific Studies, Brigham Young University Hawai‘i #1979, 55–220 Kulanui Street, Lāʻie, Hawai‘i 96762, but responsibility for opinions expressed in the articles rests with the authors alone. Subscription rate is US$40.00 yearly, payable to The Jonathan Nāpela Center for Hawaiian and Pacific Studies. The Jonathan Nāpela Center for Hawaiian and Pacific Studies (formerly The Pacific Institute) is an organization funded by Brigham Young University Hawai‘i. The Center assists the University in meeting its cultural and educational goals by undertaking a program of teaching, research, and …


Intelligent Visualization And Automated Processing For Large Scale Geographic Information Systems, Yu Jiang Dec 1999

Intelligent Visualization And Automated Processing For Large Scale Geographic Information Systems, Yu Jiang

All-Inclusive List of Electronic Theses and Dissertations

This research focuses on developing a new output system that compacts maps in multiple projections into a single Geographic Information System (GIS) without visual errors, through constructing a discrete GIS database that is managed by a Relational Data Base Management System (RDBMS). Unlike in a traditional large GIS database, the data are "physically discrete but logically continuous." In a new discrete GIS database, every map keeps its individuality without a relationship to any other map, and the relationships among the maps are centrally managed by a RDBMS. A study site was chosen at the boundary of the state of Indiana …


Introduction: Defining And Understanding Sustainability In Small Island States, Charles J. Stevens Dec 1999

Introduction: Defining And Understanding Sustainability In Small Island States, Charles J. Stevens

Pacific Studies

No abstract provided.


Development, Sustainability, And The Deforestation Of Samoa, Paul Shankman Dec 1999

Development, Sustainability, And The Deforestation Of Samoa, Paul Shankman

Pacific Studies

The forests of Samoa (formerly Western Samoa) are rapidly disappearing. This article reviews the history of Samoan deforestation, particularly during the last four decades, in the context of ideas about development and sustainability. It also examines the role of village agriculturalists in the process of deforestation. Recent economic, technological, and organizational changes have increased village agricultural expansion and, consequently, deforestation.


Contributors: Vol 22 No. 3-4, The Jonathan Nāpela Center For Hawaiian And Pacific Islands Studies Dec 1999

Contributors: Vol 22 No. 3-4, The Jonathan Nāpela Center For Hawaiian And Pacific Islands Studies

Pacific Studies

Contributors list of Vol. 22 (1999): Pacific Studies Full Issue 3-4


Artisanal Coral Reef Fisheries And Sustainable Development: The Arno Atoll Fisheries Association, Jim Hess Dec 1999

Artisanal Coral Reef Fisheries And Sustainable Development: The Arno Atoll Fisheries Association, Jim Hess

Pacific Studies

The concept of sustainable development is inexact, requiring additional specification in application. How the subject of analysis is bounded will have consequences for understanding what is being sustained as well as for determining whether something is sustained. Here I examine a fisheries development project in the Marshall Islands. Shifting boundaries, I create three accounts of the project. In the first account, which focuses on resources and monetary cost and benefits, the project is clearly unsustainable. In the second account, focusing on international relations, the project sustains the relations of power and dependency. In the third account, I suggest that evaluation …


Is Tonga's Mirab Economy Sustainable? A View From The Village And A View Without It, Mike Evans Dec 1999

Is Tonga's Mirab Economy Sustainable? A View From The Village And A View Without It, Mike Evans

Pacific Studies

The development implications of the now-classic MIRAB economic pattern for South Pacific microstates (with economies dominated by overseas remittances and foreign aid) have attracted considerable attention. Some scholars argue the MIRAB pattern is well entrenched and can be sustained with a minimum of undesirable social and economic outcomes. Others decry the acceptance of the dependency of South Pacific nations and argue for renewed effort toward the development of self-sustaining economies. I argue that the debate must directly address the underlying social relations that facilitate and shape migration and remittances. In Tonga, the movement of people from rural areas has wide-ranging …


Resource Law Notes Newsletter, No. 47, Fall Issue, 1999, University Of Colorado Boulder. Natural Resources Law Center Oct 1999

Resource Law Notes Newsletter, No. 47, Fall Issue, 1999, University Of Colorado Boulder. Natural Resources Law Center

Resource Law Notes: The Newsletter of the Natural Resources Law Center (1984-2002)

No abstract provided.


Water Current, Volume 31, No. 5, October 1999 Oct 1999

Water Current, Volume 31, No. 5, October 1999

Water Current Newsletter

Fall NWCC Meeting Well Attended
From the Director
Wyoming Development Fund Highlighted on Four States Irrigation Summer Tour
Center Pivot Inventory Map
Husker Harvest Days Winners
Status of Cooperative Agreement After Two Years
The Definitions of Science
Water News Briefs
New EPA Bioremediation Site
GovSpot Offers Best in Government and Civic Web Info
Source Water Assessment and Protection Workshop Guide Available Free from the Groundwater Foundation
Hazard Web Sites
"Watershed 2000" Call for Papers
Water Resources Lecture Series Addresses Interstate Water Commitments


Pollution Prevention: Factors Behind Toxic Release Reduction In The U.S. Paper Industry, John P. Tiefenbacher, William D. Solecki Sep 1999

Pollution Prevention: Factors Behind Toxic Release Reduction In The U.S. Paper Industry, John P. Tiefenbacher, William D. Solecki

RISK: Health, Safety & Environment (1990-2002)

Drs. Tiefenbacher and Solecki analyze the factors associated with, and influential in, the reduction of toxic releases in the U.S. paper industry.


Morphology Of Wetland Streams, Michael C. Jurmu Aug 1999

Morphology Of Wetland Streams, Michael C. Jurmu

All-Inclusive List of Electronic Theses and Dissertations

Recent understanding and concern with wetland environments has resulted in an increase in restoration and creation projects aimed at replicating these ecosystems. The unique characteristics within wetland environments result in different controls on streams traversing these areas, yet little research has been conducted to determine whether the morphology of these streams differs from streams in non-wetland, alluvial environments. Wetland streams from three different physiographic regions of the U.S. are compared to four morphological models and 12 additional features cited as typical in non-wetland streams. Analysis of this comparison will aid in determining whether wetland streams have differing morphology and which …


The Translocation Of Barramundi. A Discussion Paper., Makaira Pty Ltd Jul 1999

The Translocation Of Barramundi. A Discussion Paper., Makaira Pty Ltd

Fisheries Management Papers

There is recognisable economic benefit to the translocation of barramundi, but there is also a need to ensure the translocation will not adversely impact upon the genetic diversity, introduce disease or impact on the natural environment and biodiversity. This discussion paper has been prepared to provide information to assist in the assessment of the possible impact of translocation of barramundi into and within Western Australia, for the purposed of recreational stock enhancement, aquaculture development and domestic stocking. In contemplating the translocation any aquatic species, signigicant economic and social benefits must be balanced with biological and environmental risks; that is, the …


Community-Based Organizations And Neighborhood Environmental Problem-Solving: A Framework For Adoption Of Information Technologies, Wendy A. Kellogg Jul 1999

Community-Based Organizations And Neighborhood Environmental Problem-Solving: A Framework For Adoption Of Information Technologies, Wendy A. Kellogg

All Maxine Goodman Levin School of Urban Affairs Publications

Community-based organizations (CBOs) today seek improved capacity to address environmental problems in urban neighbourhoods. Many seek access to information technologies such as the Internet and Geographic Information Systems (GIS) to expand information about their neighbourhood's environmental quality to support their planning and service efforts. Experience with the Internet has been bolstered somewhat by programmes to create community networks. This experience and experience with GIS in planning at the municipal and state levels reveals a set of technical, organizational and personal prerequisites that bolster successful and effective adoption of information technologies. This paper reviews these prerequisites as they pertain to CBOs …