根据有限的开发信息预测景观变化及其带来的影响是指导空间战略规划制定的重要步骤。英国基于景观特征评估(landscape character assessment,LCA)的景观敏感性评估(landscape sensitivity assessment,LSA)提供了一种综合、清晰、易懂的...根据有限的开发信息预测景观变化及其带来的影响是指导空间战略规划制定的重要步骤。英国基于景观特征评估(landscape character assessment,LCA)的景观敏感性评估(landscape sensitivity assessment,LSA)提供了一种综合、清晰、易懂的方法来辅助规划和开发决策。从景观特征的角度理解景观敏感性,系统介绍了英国LSA的发展和方法,并通过案例展示其关键步骤及在不同规模尺度下的应用,最后提出了中国对英国LSA的借鉴和应用展望。展开更多
Assisted by framework of multimedia total exposure model for hazard waste sites(CalTOX),potential influences of scenario-uncertainty on multimedia health risk assessment(MHRA) and decision-making were quantitatively a...Assisted by framework of multimedia total exposure model for hazard waste sites(CalTOX),potential influences of scenario-uncertainty on multimedia health risk assessment(MHRA) and decision-making were quantitatively analyzed in a primary extent under the Chinese scenario case by deliberately varying the two key scenario-elements,namely conceptual exposure pathways combination and aim receptor cohorts choice.Results show that the independent change of one exposure pathway or receptor cohort could lead variation of MHRA results in the range of 3.6×10-6-1.4×10-5 or 6.7×10-6-2.3×10-5.And randomly simultaneous change of those two elements could lead variation of MHRA results at the range of 7.7×10-8-2.3×10-5.On the basis of the corresponding sensitivity analysis,pathways which made a valid contribution to the final modeling risk value occupied only 16.7% of all considered pathways.Afterwards,comparative analysis between influence of parameter-uncertainty and influence of scenario-uncertainty was made.In consideration of interrelationship among all types of uncertainties and financial reasonability during MHRA procedures,the integrated method how to optimize the entire procedures of MHRA was presented innovatively based on sensitivity analysis,scenario-discussion and nest Monte Carlo simulation or fuzzy mathematics.展开更多
文摘根据有限的开发信息预测景观变化及其带来的影响是指导空间战略规划制定的重要步骤。英国基于景观特征评估(landscape character assessment,LCA)的景观敏感性评估(landscape sensitivity assessment,LSA)提供了一种综合、清晰、易懂的方法来辅助规划和开发决策。从景观特征的角度理解景观敏感性,系统介绍了英国LSA的发展和方法,并通过案例展示其关键步骤及在不同规模尺度下的应用,最后提出了中国对英国LSA的借鉴和应用展望。
基金Projects(50978088,51039001,51178172,51009063) supported by the National Natural Science Foundation of ChinaProject(NCET-08- 180) supported by the Program for New Century Excellent Talents in University from the Ministry of Education of China
文摘Assisted by framework of multimedia total exposure model for hazard waste sites(CalTOX),potential influences of scenario-uncertainty on multimedia health risk assessment(MHRA) and decision-making were quantitatively analyzed in a primary extent under the Chinese scenario case by deliberately varying the two key scenario-elements,namely conceptual exposure pathways combination and aim receptor cohorts choice.Results show that the independent change of one exposure pathway or receptor cohort could lead variation of MHRA results in the range of 3.6×10-6-1.4×10-5 or 6.7×10-6-2.3×10-5.And randomly simultaneous change of those two elements could lead variation of MHRA results at the range of 7.7×10-8-2.3×10-5.On the basis of the corresponding sensitivity analysis,pathways which made a valid contribution to the final modeling risk value occupied only 16.7% of all considered pathways.Afterwards,comparative analysis between influence of parameter-uncertainty and influence of scenario-uncertainty was made.In consideration of interrelationship among all types of uncertainties and financial reasonability during MHRA procedures,the integrated method how to optimize the entire procedures of MHRA was presented innovatively based on sensitivity analysis,scenario-discussion and nest Monte Carlo simulation or fuzzy mathematics.
