共查询到19条相似文献,搜索用时 874 毫秒
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本文以山东省两个经济开发区区域环评为例,分析了各开发区在资源和环境方面的优劣势条件,论证了各开发区规划产业定位的合理性,探讨了开发区产业定位合理性评价的指标体系、调整原则、思路、方法,提出了各开发区产业定位的调整建议,并论证了调整后产业定位的合理性,促进了开发区的可持续发展。 相似文献
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环境风险评价构架的探讨 总被引:4,自引:0,他引:4
本文归纳并概括了国际上和我国环境风险评价的一般构架,从环境风险评价、安全评价、健康评价、生态评价、最大可信灾害事故及最大可接受水平等几个方面对我国环境风险评价一般构架进行了探讨,分析了我国环境风险评价构架中存在的问题,提出了进一步完善我国环境风险评价一般构架的方法,并辅以了案例分析。 相似文献
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以大庆油田南三油库建设工程为例,进行了环境风险评价,包括风险识别、源项分析、后果计算、风险计算和评价等内容,并对物质风险识别采用的标准和油气田储运工程环境风险评价重点提出了意见。该工程确定风险评价等级为一级,要从设计、建设和环境风险管理等各方面采取积极防护措施。 相似文献
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开发区区域环评中规划布局的调整建议——以山东省某经济开发区环评为例 总被引:1,自引:0,他引:1
以山东省某经济开发区环评为例,分析开发区内各功能区布局的优劣势条件及其合理性,提出对开发区内各功能区布局的调整建议,探讨开发区功能区布局的评价指标体系、调整原则、思路、方法,提出该开发区功能区布局的调整方案,并对提出的调整方案进行综合对比,最终给出较为合理的功能区布局调整方案,促进开发区的可持续发展。 相似文献
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随着化学品的使用种类和数量日益增加,有毒有害污染物的生态效应逐渐受到重视.生态风险评价模型作为较好的科研和管理技术工具,被越来越广泛地用于扩散到环境中化学物质的生态风险评价中;欧美等发达国家和地区已经建立了多个生态风险评价的模型,并投入到实际应用中.本研究系统综述和总结了毒害污染物生态风险评价模型的构建方法、种类、结构以及特征,归纳了重金属和有机污染物等主要毒害物质的风险评价模型发展状况,比较了几种较为成熟的风险评价模型的具体模块和特点,分析了模型在生态风险评价中的应用以及不足之处,在总结我国生态风险评价模型的研究方向和趋势的基础上,提出模型研究和发展的具体建议. 相似文献
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Probe into the method of regional ecological risk assessment-a case study of wetland in the Yellow River Delta in China 总被引:18,自引:0,他引:18
Ecological risk assessment (ERA) is a new field of study for evaluating the risks associated with a possible eco-environmental hazard under uncertainty. Regional ERA is more complex than general ERA, as it requires that risk receptors, risk sources, risk exposure, uncertainty and especially spatial heterogeneity all be taken into account. In this paper, a five-step process of regional ERA is developed and tested through a wetland case study in the Yellow River Delta in China. First, indices and formulas are established for measuring degrees of ecological risk and damage to ecosystems. Using a combination of remote sensing data, historical records and survey data, and with the assistance of GIS techniques, the indices and formulas are then applied to the wetland in the study area. On the basis of the assessment results, we propose a number of countermeasures for the various risk zones in the Yellow River Delta. 相似文献
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Perspectives of the Scientific Community on the Status of Ecological Risk Assessment 总被引:1,自引:0,他引:1
/ Views from a wide variety of practicing environmental professionals on the current status of ecological risk assessment (ERA) indicate consensus and divergence of opinion on the utility and practice of risk assessment. Central to the debate were the issues of whether ERA appropriately incorporates ecological and scientific principle into its conceptual paradigm. Advocates argue that ERA effectively does both, noting that much of the fault detractors find with the process has more to do with its practice than its purpose. Critics argue that failure to validate ERA predictions and the tendency to over-simplify ecological principles compromise the integrity of ERA and may lead to misleading advice on the appropriate responses to environmental problems. All authors felt that many improvements could be made, including validation, better definition of the ecological questions and boundaries of ERA, improved harmonization of selected methods, and improvements in the knowledge base. Despite identified deficiencies, most authors felt that ERA was a useful process undergoing evolutionary changes that will inevitably determine the range of environmental problems to which it can be appropriately applied. The views expressed give ERA a cautious vote of approval and highlight many of the critical strengths and weaknesses in one of our most important environmental assessment tools.KEY WORDS: Ecological risk assessment; Ecology; Probability 相似文献
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A watershed disturbance index developed by the USDA Forest Service called equivalent roaded area (ERA) was used to assess
the cumulative effect from forest management in California's Sierra Nevada and Klamath mountain ranges. The basins' ERA index
increased as logging and road-building occurred and then decreased over time as management ceased and vegetation recovered.
A refinement of the standard index emphasized disturbances in sensitive, near-channel areas, and evaluated recovery periods
of 20, 30, and 50 years. Shorter recovery periods yielded better correlations between recovering forest systems and aquatic
response than the longer recovery period, as represented by ERA and diversity or dominance, respectively. The refined ERA
index correlated more closely with macroinvertebrate dominance and diversity information that was available for part of the
study period. A minimum ERA threshold of 5% was detected, below which no effect to the macroinvertebrate community was observed.
Above this threshold, elevated ERA values were associated with a decline in macroinvertebrate diversity and an increase in
dominance of the top five taxa. Use of an ERA technique that emphasizes near-channel areas and biological thresholds would
contribute to the Forest Service's implementation of ecosystem management. 相似文献
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Kan-Kan Wu 《Journal of Environmental Planning and Management》2016,59(5):826-842
Environmental risk assessment (ERA) is a powerful technical tool for analyzing potential and extreme adverse environmental impacts, and has found wide application in supporting decision-making processes over the last two decades. However, to date there has been no interrelated application of ERA to support the processes of strategic decision-making (SDM), especially in coastal areas.
In this paper, we attempt to verify the feasibility of the proposed integrated ERA–SDM approach and its methodology by applying it to two case studies (in Xiamen Bay and Luoyuan Bay) of the principal coastal functional zoning (PCFZ, a kind of SDM and similar to the coastal and marine spatial planning in western). The results show that the integrated ERA–SDM approach could integrate ERA into the entire SDM process, directly support the PCFZ, and avoid or mitigate dire environmental risk that can be introduced by SDM processes. 相似文献
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Quantifying natural resource injuries and ecological service reductions: challenges and opportunities 总被引:1,自引:0,他引:1
The natural resource damage assessment (NRDA) provisions of the Comprehensive Environmental Response, Compensation, and Liability
Act (CERCLA) and the Oil Pollution Act (OPA) are complex and have been difficult to implement. The complexity and difficulty
in implementation arise both from the assessment procedures specified in agency NRDA guidance and from the limited ability
of ecologists to quantify impacts of hazardous substances on natural resources. This paper explores the scientific aspects
of NRDA implementation, and discusses conceptual and methodological relationships between NRDA and the much broader field
of ecological risk assessment (ERA). We discuss three critical components of the NRDA assessment approach: measuring natural
resource injuries and reductions in resource services; evaluating causality; and establishing baseline conditions. We identify
(1) specific approaches drawn from ERA practice that could improve each of these components, and (2) research needs and institutional
changes that may improve the ability of the NRDA process to achieve its stated objectives. We recommend the acceleration of
the ongoing dialogue among NRDA practitioners from the Trustee and PRP communities as a first step toward resolving the procedural
and technical deficiencies of the NRDA process. 相似文献
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通过检索近年来的相关期刊,同时参考相关专著,从研究内容和研究方法两个方面分别进行分析,认为事件旅游的体验、动机、规划与管理、影响、模式与进程是当前事件旅游研究的主要内容,研究方法主要表现为结合具体案例的描述性分析和统计抽样分析。结果宏观地反映了近些年来国外事件旅游研究的现状,提出了事件旅游研究的未来趋势。 相似文献
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