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排序方式: 共有136条查询结果,搜索用时 15 毫秒
1.
Regional Environmental Change - Agro-ecosystem energy profiles reveal energy flows into, within, and out of US Great Plains farm communities across 140 years. This study evaluates external... 相似文献
2.
Armando A. Apan Andrew Le Brocque Geoff Cockfield 《Journal of Environmental Planning and Management》2004,47(6):811-825
To address the limited application of analytical and modelling techniques in prioritizing revegetation sites for dryland salinity (saline land) management, a case study of the Hodgson Creek catchment in Queensland, Australia, was conducted. An analytical framework was developed, incorporating the use of spatial datasets (Landsat 7 image, DEM, soil map, and salinity map), which were processed using digital image processing techniques and a geographic information system (GIS). Revegetation sites were mapped and their priority determined based on recharge area, land use/cover and sub‐catchment salinity. The analytical framework presented here enhances the systematic use of land information, widens the scope for scenario testing, and improves the testing of alternative revegetation options. The spatial patterns of revegetation sites could provide an additional set of information relevant in the design of revegetation strategies. 相似文献
3.
The operational dilemmas and challenges associated with the practice of community-based environmental planning (CBEP) are examined. The paper examines the frequently invoked ‘bottom-up’ versus ‘top-down’ dichotomy and argues that environmental governance is more complex, dynamic and multi-scalar than this simple dichotomy implies. The paper identifies six key problems with the CBEP approach: (i) the conceptualization of ‘community’ which poorly accounts for difference; (ii) problems of inequality; (iii) the organizational capacity and efficacy of community groups; (iv) the scale of CBEP; (v) the types of knowledge utilized by communities in environmental management; and (vi) the potential for parochial concerns to dominate the priorities and agenda of community organizations. The paper analyses each of these issues, identifies planning principles that may aid resolution, and suggests possible remedies. 相似文献
4.
The Relative Importance of Landscape Amenity and Health Impacts in the Wind Farm Debate in Australia
Linda Courtenay Botterill Geoff Cockfield 《Journal of Environmental Policy & Planning》2016,18(4):447-462
In recent years, Australia has experienced public debate around the growth in wind farms as part of government and community strategies to move from fossil fuels to renewable energy. Many of the arguments put forward by opponents and supporters are similar to those that have been evident in North America and Western Europe, including possible environmental impacts on wildlife, noise levels and, perhaps most prominently adverse changes in ‘landscape amenity’. A concern of increasing prominence is that of adverse human health impacts from proximity to operating turbines. Using analysis of submissions to public inquiries and a small number of detailed interviews, we consider the increased focus in Australia on the health impacts of wind farms. We note that health impacts, as elsewhere in the world, are often part of a suite of objections to wind farm developments but conclude that for some people near such developments, these are the main concern and not a cover or proxy for other concerns, such as changes in landscape amenity and aesthetics. 相似文献
5.
Packa Vlastimil Howell Todd Bostan Vadim Furdui Vasile I. 《Environmental science and pollution research international》2021,28(23):29498-29508
Environmental Science and Pollution Research - Trophic status in surface waters has been mostly monitored by measuring soluble reactive phosphorus (SRP) and total phosphorus (TP). Additional to... 相似文献
6.
Colin Scott Steve E. Lewis Rob Milla Matthew C. Taylor Andrew J.W. Rodgers Geoff Dumsday Jon E. Brodie John G. Oakeshott Robyn J. Russell 《Journal of environmental management》2010,91(10):2075-2078
Herbicide contamination from agriculture is a major issue worldwide, and has been identified as a threat to freshwater and marine environments in the Great Barrier Reef World Heritage Area in Australia. The triazine herbicides are of particular concern because of potential adverse effects, both on photosynthetic organisms and upon vertebrate development. To date a number of bioremediation strategies have been proposed for triazine herbicides, but are unlikely to be implemented due to their reliance upon the release of genetically modified organisms. We propose an alternative strategy using a free-enzyme bioremediant, which is unconstrained by the issues surrounding the use of live organisms. Here we report an initial field trial with an enzyme-based product, demonstrating that the technology is technically capable of remediating water bodies contaminated with the most common triazine herbicide, atrazine. 相似文献
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Application of the pressure-state-response framework to perceptions reporting of the state of the New Zealand environment 总被引:6,自引:0,他引:6
The Pressure-State-Response framework for environmental reporting was used as a basis to develop a long-term study of people's perceptions of the state of the New Zealand environment. A postal survey of 2000 people, randomly drawn from the New Zealand electoral roll was used to gather data--an effective response rate of 48% was achieved. A range of different resource sectors was examined. We report on New Zealand's air, native animals and plants, and marine fisheries, as well as New Zealand compared to other developed countries. Respondents generally considered that in terms of pressures, states and responses, New Zealand was performing better than other developed countries and that for the resources examined here overall performance was in the adequate to good range, except for marine fisheries. The survey appears to be a useful tool for linking perceptions data into State of the Environment reporting. It also helps identify policy issues where perceptions do not match other scientific evidence or management initiatives. Such findings can be important for the successful implementation of policy measures. 相似文献
10.
Harris G 《Disasters》2002,26(1):49-54
This paper presents an economic evaluation of landmine clearance in Afghanistan. The main benefits comprise increased agricultural output, saved transport time and running costs, saved human casualties and the saved costs of supporting refugees and displaced persons. An investment of US$100 million between 1988 and 1998 is estimated to provide annual benefits of $50.3 million per annum between 1999 and 2008. This translates into net present values of between $935 and $1,744 million, depending on the rate of discount used. This contrasts with the negative NPVs estimated for several other countries. 相似文献