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A system model was designed to simulate the interaction of climatologic and biologic factors in the biological oxidation of organic soils in ordert to stimulate research on this diminishing resource and attendant water quality problems in the Florida Everglades area. This is a mass balance model in which carbon and nitrogen are conserved in the transformations. It was designed to test different management alternatives for slowing the rate of soil subsidence and to estimate their potential effect on water quality by simulating subsidence rates and the release rates of nitrates, nitrites, and organic acids to ground and surface waters.The biological submodel is structured about two major compartments — the total non-living carbon compartment and a living carbon compartment that includes the microbial biomass and functioning extracellular enzymes.Simulations of the model show the effects of temperature, organic composition, and water table height on carbon dioxide evolution from the soil. 相似文献
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Bob Evans Marko Joas Susan Sundback 《Journal of Environmental Planning and Management》2006,49(6):849-867
This paper draws upon the DISCUS (Developing Institutional and Social Capacity for Sustainable Development) research project, co-funded by the European Commission. The project was undertaken during 2001 – 2004 and involved an in-depth study of 40 European towns and cities in order to understand the institutional and social factors and conditions that might contribute to policy ‘achievement' or ‘failure' in local sustainable development policy and practice. Based on the findings of this research it proposes a conceptual framework for local sustainable development, linking the concepts of institutional capital, social capital and governance to provide a model for understanding the governing of local sustainability. The research shows that in those cases that exhibit sustainable development policy achievements, there are also greater levels of civil society activity and knowledge regarding sustainability issues, and high levels of institutional capacity. Confident local government is crucial to the development of institutional capacity and to institutional learning. One aspect of this is local authorities being equipped to address the longer-term issues and to have a strategic vision for a sustainable future. 相似文献
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Abstract ‘Market transformation’ of the significant urban development industry towards more sustainable practices is not moving at great pace. Design and assessment systems that may promote uptake of more sustainable urban design and development are reviewed briefly followed by a comparison between building and neighbourhood scales. For the latter there is a dearth of design and assessment tools for the residential built environment and of indicators to monitor progress towards sustainable development. Local authorities increasingly require an integrated approach to data collection and inclusion of infrastructure service providers in design, assessment and monitoring of urban development and associated environmental effects. By examining attempts to increase uptake of more sustainable residential development, the potential for tools and indicators at the neighbourhood scale to reduce environmental impact of the built environment is highlighted. It is recommended that built environment initiatives need to be combined with research into behavioural changes to achieve the desired outcome of a sustainable built environment and to increase the dialogue between communities, developers and local authorities. 相似文献
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David Pepper Sally Eden Gordon Walker Susie Ohlenschlager Bob Roper Mary Blake 《Local Environment》2013,18(2):231-244
Making Cities Work: the role of local government in the urban environment. Richard Gilbert, Don Stevenson, Herbert Girardet &; Richard Stren, 1996, London, Earthscan, 203pp. ISBN 1 85383 354 1, £13.95 pbk Environmental Policy in an International Context, Vols 1–3: Perspectives, Conflicts and Prospects. P. Glasbergen &; A. Blowers (Series Eds) London, Arnold Rhetoric and Reality in Environmental Policy. M. Wintle &; R. Reeve (Eds), 1994, Aldershot, Avebury Studies in Green Research, 154 pp. ISBN 1 85628 927 3 FutureNatural: Nature, Science, Culture. G. Roberston et al. (Eds) 1996, London, Routledge, ISBN 0415 070139, £40.00 hbk Environmental Policy with Political Integration: the European Union and the United States. New horizons in environmental economics. John B. Braden, Henk Folmer &; Thomas S. Ulen (Eds), 1996, Cheltenham, Elgar Publishing, 477 pp. ISBN 1 85898 217 0 相似文献