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随着城市现代化进程的加快,工程建设活动日趋频繁.在城市规划、工程建设前进行地质条件分析、适宜性评价是十分必要的.工程建设适宜性受多种因素影响,各因素间相互关联但影响程度不同.文章以黄山市中心城区为实例,从地质环境条件角度出发,介绍基于地理信息系统（GIS）和层次分析法（AHP）的灰色评估法在实际评价工作中的具体应用.该方法首先选取与工程建设适宜性密切相关的影响因素作为评价因子,在对评价单因子定性评价的基础上,用AHP确定各评价单因子的权重,最后用灰色评估法对工程建设适宜性进行综合评估.该应用效果较好,可在同类评价中推广. 相似文献
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In Antarctica, the marine ecosystem is dynamically interrelated with the terrestrial ecosystem. An example of the link between these two ecosystems is the biogeochemical cycle of phosphorus. Biovectors, such as penguins, transport phosphorus from sea to land, play a key role in this cycle. In this paper, we selected three colonies of penguins, the most important seabirds in Antarctica, and computed the annual quantity of phosphorus transferred from sea to land by these birds. Our results show that adult penguins from colonies at Ardley Island, the Vestfold Hills, and Ross Island could transfer phosphorus in the form of guano at up to 12 349, 167 036, and 97 841 kg/a, respectively, over their breeding period. These quantities are equivalent to an annual input of 3.96×109–1.63×1010 kg of seawater to the land of Antarctica. Finally, we discuss the impact of phosphorus on the ice-free areas of the Antarctica. 相似文献
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为了了解地质环境条件及其与社会经济的匹配程度，开展了环巢湖地区地质环境承载能力评价.在分析地质环境特征的基础上，从本底和状态两个角度建立了研究区地质环境承载能力评价指标体系.应用层次分析法（AHP）和专家打分法分别确定各个评价指标权重，并基于GIS软件对各指标层加权叠加，最后获得研究区地质环境承载能力评价结果.结果表明，环巢湖地区地质环境承载能力本底状况较好，中—高区面积占总面积的93.52%；承载状态主要为盈余—均衡区，超载区面积仅占总面积的0.33%，零星分布在银屏山、刘家墩和雾顶山. 相似文献
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