首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 31 毫秒
1.
Global sustainability: Toward measurement   总被引:2,自引:0,他引:2  
The widespread interest in the concept of sustainable environment and development has been accompanied by the need to develop useful systems of measurement. We discuss the use of indicators which might be used to assess such conditions. Our characteristics, or criteria, for desirable global sustainability indicators are:
  • sensitivity to change in time
  • sensitivity to change across space or within groups
  • predictive ability
  • availability of reference or threshold values
  • ability to measure reversibility or controllability
  • appropriate data transformation
  • integrative ability
  • relative ease of collection and use
  • We discuss the basis of these characteristics, and examine two categories of indicators (soil erosion and population) and two specific indicators (physical quality of life index and energy imports as a percentage of consumption) for their value as sustainability measures.  相似文献   

    2.
    In the United States public involvement in the Environmental Impact Statement (EIS) process is required by Council on Environmental Quality (CEQ) Guidelines, Executive mandates, and agency guidelines. Public participation after the initial Environmental Impact Assessment (EIA) and throughout the preparation of the Draft Environmental Impact Statement (DEIS) is desirable for it permits contributions from:
    1. those who are directly affected by a proposed project.
    2. individuals with expertise in environmental fields that may be affected by government action.
    Early public participation can be useful in identifying environmental problems and potential sources of controversy. A systematic approach should be applied by government agencies to solicit public opinion throughout the preparation of the DEIS. Early, active, and meaningful participation particularly by those government and public segments most affected by the proposed project is a positive step towards effectively using the EIS as a management tool for mitigating impacts to the human environment. Here we discuss the role of public participation in the EIS process and develop an approach for initiating early and expressive public participation.  相似文献   

    3.
    A model based on theKLS factors of the Universal Soil Loss Equation (USLE) accurately predicted temporal dynamics and relative peak levels of suspended solids, turbidity, and phosphorus in an agricultural watershed with well-protected streambanks and cultivation to the stream edge. Fine suspended solids derived from surface runoff appeared to be a major component of the suspended solids in this stream. The model did not predict the same parameters in a watershed with unstable channel substrates, exposed streambanks, and heterogeneity in riparian vegetation and channel morphology. The rate of increase in concentration of the water quality parameters was higher than predicted in areas without riparian vegetation and with unstable substrates. Peak levels were higher than predicted where unstable channel substrates occurred, and potential energy of the stream was high because of stream alterations (removal of near-stream vegetation and creation of a uniform, straight channel). Timing of the peak levels of suspended solids, turbidity, and phosphorus in these areas seemed related to major flushes of discharge due to delayed inputs from the surface or subsurface or both or to rapid urban drainage. Higher suspended solids concentration in this stream seemed to involve larger quantities of large particles. Thus, the USLE may not adequately predict relative water quality conditions within a watershed when variation in channel morphology and riparian vegetation exists. We make the following recommendations:
    1. Models to predict water quality effects of management programs should combine a terrestrial phase (which details hydrologic and erosion processes associated with surface runoff) with an aquatic phase (which details hydrologic processes of scour and sediment transport in channels). The impact of near-channel areas on these hydrologic processes should receive special attention.
    2. Sampling schemes should be designed to account for the impact on water quality of both watershed land surface and inand near-channel processes. In order to help distinguish sources of suspended solids, researchers should emphasize analysis of size distribution of particles transported.
    3. Best management systems for improving the broadest range of water resources in agricultural watersheds need to be based on an expanded “critical area” approach, which includes identification of critical erosive and depositional areas in both terrestrial and aquatic environments.
      相似文献   

    4.
    In developing countries without the availability of reliable pavement management systems, recycling techniques may offer the best alternative for pavement structural rehabilitation. However, for many government officials and contractors there is a clear understanding of the technical advantages of recycling but not a clear perspective of cost saving. Since cost is a relative value among different regions of any country the following work makes an energy analysis of the construction process of the three different rehabilitation techniques available in Chile. Three different structural pavement rehabilitation alternatives were studied and compared using an energy consumption methodology:
    • •Asphalt overlay;
    • •Reconstruction;
    • •Cold in place recycling with foamed asphalt.
    The methodology considers different project scenarios by combining expected traffic and soil support values. For each rehabilitation technique and scenario, the construction processes were analyzed and the design layers were transformed to equivalent energy units (MJ/m2).Results show that cold in place recycling utilizes the lowest amount of energy compared with reconstruction or an asphalt overlay in all the scenarios studied, producing more differences when rehabilitating roads for less trafficked roads. The study also concludes that aggregate haulage distance is the most sensitive factor on total energy consumption when comparing the three alternatives.  相似文献   

    5.
    6.
    Abstract

    This paper presents the results of a national project investigating Australian local government (LG) attempts to deliver beneficial environmental outcomes. It briefly describes the extensive environmental planning, management and protection roles played by Australian LGs. It notes that these roles are poorly documented within the academic literature, and makes a case for fundamental research to better understand LGs and their work from the inside. It describes this project's use of grounded theory methods in gathering and analysing 34 case studies of Australian LG environmental initiatives. The inside perspectives represented by the papers show that Australian LG environmental work:
    • extends beyond its statutory requirements;

    • is novel and creative;

    • endures by balancing ecological, social and economic values;

    • demonstrates different patterns depending on its planning, management or protection focus; and

    • usually involves environmental strategists with long-term, passionate commitments to local environmental values.

      相似文献   

    7.
    Government priorities on provincial Nutrient Management Planning (NMP) programs include improving the program effectiveness for environmental quality protection, and promoting more widespread adoption. Understanding the effect of NMP on both crop yield and key water-quality parameters in agricultural watersheds requires a comprehensive evaluation that takes into consideration important NMP attributes and location-specific farming conditions. This study applied the Soil and Water Assessment Tool (SWAT) to investigate the effects of crop and rotation sequence, tillage type, and nutrient N application rate on crop yield and the associated groundwater ${\text{NO}_{3}}^{ - } {\text{-N }}$ leaching and sediment loss. The SWAT model was applied to the Thomas Brook Watershed, located in the most intensively managed agricultural region of Nova Scotia, Canada. Cropping systems evaluated included seven fertilizer application rates and two tillage systems (i.e., conventional tillage and no-till). The analysis reflected cropping systems commonly managed by farmers in the Annapolis Valley region, including grain corn-based and potato-based cropping systems, and a vegetable-horticulture system. ANOVA models were developed and used to assess the effects of crop management choices on crop yield and two water-quality parameters (i.e., ${\text{NO}_{3}}^{ - } {\text{-N }}$ leaching and sediment loading). Results suggest that existing recommended N-fertilizer rate can be reduced by 10–25 %, for grain crop production, to significantly lower ${\text{NO}_{3}}^{ - } {\text{-N }}$ leaching (P > 0.05) while optimizing the crop yield. The analysis identified the nutrient N rates in combination with specific crops and rotation systems that can be used to manage ${\text{NO}_{3}}^{ - } {\text{-N }}$ leaching while balancing impacts on crop yields within the watershed.  相似文献   

    8.
    Methane, coal and biomass are being considered as alternatives to crude oil for the production of basic petrochemicals, such as light olefins. This paper is a study on the production costs of 24 process routes utilizing these primary energy sources. A wide range of projected energy prices in 2030–2050 found in the open literature is used. The basis for comparison is the production cost per t of high value chemicals (HVCs or light olefin-value equivalent). A Monte Carlo method was used to estimate the ranking of production costs of all 24 routes with 10,000 trials of varying energy prices and CO2 emissions costs (assumed to be within $0–100/t CO2; the total CO2 emissions, or cradle-to-grave CO2 emissions, were considered). High energy prices in the first three quarter of 2008 were tested separately. The main findings are:
    • Production costs: while the production costs of crude oil- and natural gas-based routes are within $500–900/t HVCs, those of coal- and biomass-based routes are mostly within $400–800/t HVCs. Production costs of coal- and biomass-based routes are in general quite similar while in some cases the difference is significant. Among the top seven most expensive routes, six are oil- and gas-based routes. Among the top seven least expensive routes, six are coal and biomass routes.
    • CO2 emissions costs: the effect of CO2 emissions costs was found to be strong on the coal-based routes and also quite significant on the biomass-based routes. However, the effect on oil- and gas-based routes is found to be small or relatively moderate.
    • Energy prices in 2008: most of the coal-based routes and biomass-based routes (particularly sugar cane) still have much lower production costs than the oil- and gas-based routes (even if international freight costs are included).
    To ensure the reduction of CO2 emissions in the long-term, we suggest that policies for the petrochemicals industry focus on stimulating the use of biomass as well as carbon capture and storage features for coal-based routes.  相似文献   

    9.
    ABSTRACT: Efforts to protect free flowing streams of state significance have met with limited success. Some states established large numbers of “instant” scenic rivers through legislation, then have worked out procedures to add new streams. Other have inadequate current funding and staff to implement the law. The chief barriers to growth of the systems are:
    • lack of program staffing and funding and support in some states,
    • slowness of the study and planning process,
    • landowner uncertainties about the effects on their property and rights, and
    • legal complexities.
    There are few difficulties experienced in evaluation criteria, but a lack of objective rating systems may cause future problems. The state systems which have grown require careful planning, thorough communications with landowners, flexible land use control programs, and systematic education of community leaders about the values and operation of the program. State systems now protect about four times the river mileage of the federal wild and scenic rivers program. This gap is likely to widen even more, if state programs can achieve their growth potential. No state appears to be yet near to achieving the full purpose of the policy makers who designed and instituted the scenic rivers programs.  相似文献   

    10.
    The use of voluntary programs targeting resource conservation on private land has become increasingly prevalent in environmental policy. Voluntary programs potentially offer significant benefits over regulatory and market-based approaches. This article examines the factors affecting landowner participation in voluntary forest conservation programs using a combination of parcel-level GIS and remotely sensed data and semi-structured interviews of landowners in Monroe County, Indiana. A logistic regression model is applied to determine the probability of participation based on landowner education, membership in other non-forest voluntary programs, dominant land use activity, parcel size, distance from urban center, land resource portfolios, and forest cover. Both land use activity and the spatial configuration of a landholder’s resource portfolio are found to be statistically significant with important implications for the design and implementation of voluntary programs.
    Derek KauneckisEmail:
      相似文献   

    11.
    Svejcar et al. (Environ Manage, 2014) offered several perspectives regarding Beschta et al. (Environ Manage 51:474–491, 2013)—a publication that addressed the interacting ecological effects of climate change and domestic, wild, and feral ungulates on public lands in the western United States (US)—by largely focusing on three livestock grazing issues: (1) legacy versus current day impacts; (2) grazing as a fire reduction tool; and (3) the complexity of grazing. Regarding these issues, we indicate that (1) legacy effects to western ecosystems were indeed significant and contemporary livestock use on public lands generally maintains or exacerbates many of those effects; (2) livestock grazing has been a major factor affecting fire frequency, fire severity, and ecosystem trajectories in the western US for over a century; and (3) the removal or reduction of grazing impacts in these altered ecosystems is the most effective means of initiating ecological recovery. Svejcar et al. (Environ Manage, 2014) offer no evidence that livestock use is consistent with the timely recovery of grazing-degraded uplands, riparian areas, or stream systems. We thus conclude that public-land ecosystems can best persist or cope with a changing climate by significantly reducing ungulate grazing and related impacts.  相似文献   

    12.
    The International Standardization Organization (ISO) will be publishing the first international environmental management system standard: ISO 14001. The ultimate impact of this standard is subject to heated debate throughout the industrial and environmental communities. This article focuses on one aspect of the standard: the process of certification/registration. ISO 14001 is a voluntary initiative. Companies will need to decide for themselves whether or not to pursue certification. As indicated in Section 1 of ISO 14001, ?This International Standard is applicable to any organization that wishes to
    • a) implement, maintain and improve an environmental management system;
    • b) assure itself of its conformance with its stated environmental policy;
    • c) demonstrate such conformance to others;
    • d) seek certification/registration of its environmental management system by an external organization;
    • e) make a self determination and declaration of conformance with the standard.”?
    As the introduction to ISO 14001 makes clear, ?the specification contains only those requirements that may be objectively audited for certification/registration and/or self declaration purposes.”? Any additional ?guidance…will be contained in other international standards.”? To avoid confusion, these other international standards tend to be called ?guidelines”?. Of particular interest to those associated with the certification and registration of systems to ISO 14001 are the three guidelines for environmental auditing. Officially these are referred to as:
    • ISO 14010 - Guidelines for Environmental Auditing - General Principles,
    • ISO 14011 - Guidelines for Environmental Auditing - Audit Procedures - Auditing of Environmental Management Systems, and
    • ISO 14012 - Guidelines for Environmental Auditing - Qualification Criteria for Environmental Auditors.
      相似文献   

    13.
    ABSTRACT: Decisionmaking associated with the Nation's 1.7 billion acres of forest and range land has become increasingly complicated because of the rise in competition for resource use and in the awareness of environmental and social effects. This system analysis approach uses four models to synthesize pertinent masses of information into measures of economic, environmental, and social impacts. The system results can be used to help evaluate alternative national programs. The models are:

    14.
    ABSTRACT: The power of computers has increased in recent decades, and one might expect improved management to result because decisions can be made with understanding available only via models. However, there is potential for quite the opposite: poor decisions due to unrealistic model output generated by users without access to appropriate training in the use of models. We discuss and, by reference to water demand models (IWR-MAIN, MWD-MAIN), illustrate three areas in which unintended errors of judgment by untrained personnel may cause difficulty:
    • * Attributes of management models; if output from any type of model has no measure of confidence, then results may be over- or undervalued
    • * Input data; with complex models, problems here typically will be difficult to detect.
    • * Calibration and history-matching (verification); if these steps or data are combined, then users should be less trustful of model output than otherwise.
    Because all models have weaknesses and because there always is uncertainty about output from any model, we end with suggestions for coping with complex models. Monitoring programs play a central role in such efforts because they can identify discrepancies between model predictions and actual events and because they can ensure time is available to develop solutions for problems unanticipated in the modeling effort.  相似文献   

    15.
    When an organization embarks on the path of environmental leadership, how does it track and quantify its efforts? This article describes a system for identifying, tracking, and communicating environmental efforts.
  • 1 Anita Wolfe wishes to recognize Richard P. Wells'S article, “Point of View: Environmental Management in Mexico,” TQEM, Vol. 2, No. 3, as an invaluable source in helping to develop this system.
  • In addition, it examines the experience of Ontario Hydro, Canada'S largest public utility, within a similar framework.  相似文献   

    16.
    That segment of the community I would say is just in general pretty disenfranchised. We found that if you want participation you have to go to them. I mean there are days when you just need to go knock on the door.

    Brownfields developer in a poor urban neighbourhood

    This article considers the role that champions play as advocates for socioeconomically disadvantaged community member involvement in environmental management decision-making. Six case studies of brownfields redevelopment projects located in poor urban neighbourhoods are examined. Analysis of these case studies reveals how champion behaviour, which has typically been studied only in the context of technological innovation, is enacted in public participation efforts in the service of environmental justice. The study finds that champions who emerge in these settings lead the development and implementation of non-standard public participation process innovations.  相似文献   

    17.
    This work highlights the evolution of flood disasters and their impacts upon environmental and socioeconomic aspects both worldwide and in Small Island Developing States (SIDS) in particular. For our research, we reviewed the stress factors affecting flood disasters and performed surveys of two focus groups in Funchal municipality on Madeira Island (Portugal). Our research identifies the main causes of the serious impacts that flash floods can have on Funchal city. These include:
    • The occupation of floodplain areas,
    • Canalization of water courses,
    • Erosion and transport of soil from upstream hillslopes due to deforestation, and
    • Intensive precipitation of long duration.
      相似文献   

    18.
    Abstract

    We have survived Canada's assault on our identity and our rights … Our survival is a testament to our determination and will to survive as a people. We are prepared to participate in Canada's future—but only on the terms that we believe to be our rightful heritage.

    Wallace Labillois, Council of Elders, Kingsclear, New Brunswick

    This paper argues for a strengthening of the theoretical relationship between neo-liberalism and environmental justice. Empirical research involving First Nations communities in southwestern Ontario suggests that neo-liberal reforms introduced in the mid-1990s were particularly discriminatory against Canada's indigenous peoples, serving to exacerbate historical disparities in health, environment pollution, and well-being. In particular, under neo-liberal reform in Ontario, recognition of environmental injustices has become much more difficult for First Nations communities. Furthermore, this ‘new’ form of environmental governance has broadly reduced legitimate opportunities for First Nations to participate in environmental governance that affects their health and welfare. In short, this research supports a widening of the definition of environmental justice advocated by David Schlosberg and others (Environmental Politics, 13(3) (2004), pp. 517–540; Agyeman, Bullard and Evans 2003 Agyeman, J., Bullard, R. D. and Evans, B. 2003a. “Joined-up thinking: bringing together sustainability, environmental justice and equity”. In Just Sustainabilities: Development in an Unequal World, Edited by: Agyeman, J., Bullard, R. D. and Evans, B. Cambridge, MA: MIT Press.  [Google Scholar]; Akwesasne Task Force on the Environment, Research Advisory committee 1997; Di Chiro 1998 Di Chiro, Giovanna. 1998. “Environmental Justice from the Grassroots: Reflections on History, Gender and Expertise”. In The Struggle for Ecological Democracy: Environmental Justice Movements in the United States, Edited by: Faber, D. NY: Guilford.  [Google Scholar]) if we are to understand the subtle, complex and multiple ways that this new form of environmental governance is particularly harmful to marginalized groups, such as First Nations in Canada.  相似文献   

    19.
    The development of the aquaculture industry in Canada has triggered a conflict of a scope never seen before. As stated in Young and Matthews’ The Aquaculture Controversy, this debate has “mushroomed over the past several decades to become one of the most bitter and stubborn face-offs over industrial development ever witnessed in Canada” (Young and Matthews in The aquaculture controversy in Canada. Activism, policy and contested science. UBC Press, Vancouver, p 3, 2010). It opposes a wide variety of actors: from industrial investors, scientists, politicians and environmentalists to Native associations and communities, citizens groups and local stakeholders. The opposition is fierce between those in favor of a flourishing and modern aquaculture of industrial nature and those who fear the dreadful consequences of such an industry. In particular, the possible implementation of biotechnology innovations, such as a genetically modified salmon, has made this debate coextensive with the GMO debate, thus multiplying the opposition’s spectrum of arguments against the industry. Throughout the debate, Canadian environmental NGOs like the Suzuki Foundation and Greenpeace Canada have assumed leadership over the opposition to aquaculture development with certain success. Their participation in the debate features numerous ethical concerns related to environmental health, a respect for wilderness and local human communities. Such a position can be associated overall with a form of ecocentric ethics or concern. Nevertheless, a careful examination of the technical solutions proposed by these NGOs reveals their embeddedness in biocentrism. Through the example taken from the Canadian debate on aquaculture development, this paper aims to highlight the conceptual difficulty of enacting ecocentric ethical positions beyond formal arguments. Because ecocentrism implies a true paradigm shift, not only in mentality, but also in the way we conceive our technical interventions in nature, biocentrism remains an important practical method to enact ethical positions related to environmental concerns in public debates.  相似文献   

    20.
    The recognition of the significance of the residential environment in contributing to non-point source (NPS) pollution and the inherently dispersed nature of NPS pollution itself that presents significant challenges to effective regulation has led to the creation and dissemination of best management practices (BMPs) that can reduce the impacts of NPS pollution (Environmental Protection Agency US, Protecting water quality from urban runoff, http://www.epa.gov/npdes/pubs/nps_urban-facts_final.pdf, 2003). However, very few studies have examined the factors that influence the adoption of BMPs by residential homeowners, despite the fact that residential environments have been identified as one of the most significant contributors to NPS pollution. Given this need, the purpose of this project was to explore how demographic and knowledge-based factors predict adoption of residential BMPs in an urbanizing watershed in Northern Illinois using statistical analyses of survey data collected as part of a watershed planning process. The findings indicate that broad knowledge of BMPs is the strongest predictor of use for a specific BMP. Knowledge of BMPs is strongly correlated with their use, which reinforces the need for educational programs, even among those assumed to be knowledgeable about BMPs.  相似文献   

    设为首页 | 免责声明 | 关于勤云 | 加入收藏

    Copyright©北京勤云科技发展有限公司  京ICP备09084417号