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长江经济带工业废水排放的时空格局演化及驱动因素 总被引:7,自引:2,他引:5
利用探索性空间分析方法(ESDA)和迪氏分解模型(LMDI)研究长江经济带2002~2013年工业废水排放的时空格局演化和主要驱动因素。① 时空格局演化方面,时间上工业废水排放先上升后下降,在2005年达到峰值。空间上,排放量自上游向下游增加;高排放城市减少,中排放城市增多;工业废水排放自下游向中上游转移,并由大城市向中小城市扩散;呈现明显的空间集聚状态。② 驱动因素方面,经济发展效应和技术进步效应分别是工业废水排放增多和降低的主导因素;产业结构效应的影响取决于产业发展政策的调整;人口规模效应影响较小。 相似文献
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泰安市旅游地质、地质遗迹资源丰富,保存完好,地质现象类型多样、鲜明生动,与地形地貌景观和水体景观有机融合,具有极高的科学研究价值和美学观赏价值.本次工作查明泰安市重要旅游地质资源154处,划分为3个大类、10个类、23个亚类;经综合对比分析、专家点评,对154处重要地质遗迹点进行了评价;同时依据地质遗迹点的地貌特征和构造属性,结合遗迹分布规律等对地质遗迹进行区划.通过研究认为泰安市地质遗迹资源呈明显的带状分布,与泰山岩群结晶基底以及一些新太古代侵入岩有关的地质遗迹主要出露于山地地质遗迹区,层型剖面、地质事件剖面、古生物群化石产地出露于丘陵地带,而以碳酸盐岩地貌、水体地貌为主的地质遗迹则出露于平原地带. 相似文献
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The shapes of the urban lakes in Wuhan city have been strongly influenced by the rapid industrialization and urbanization experienced in recent decades.Based on topographic maps and remote sensing images,the temporal and spatial changes of East Lake,Wuhan city,over the past two decades were analyzed.The landscape shape index(LSI)and centroid method were applied to analyze the evolution of lake morphology and its causes.Several key results were obtained.(1)The surface area of East Lake decreased sharply by 2.13 km2 from 1995 to 2005,and slightly by 1.00 km2 from 2005 to 2015.The shoreline length of East Lake displayed a continuous trend of decline during the study period:The length reduced by 21.89 km from 1995 to 2005,and by 0.67 km from 2005 to 2015.The LSI values,7.04(1995),6.46(2005),and 6.28(2015),displayed an accelerated downward trend,indicating a reduction of complexity in East Lake and the intensification of manual interventions in the water body.(2)The changes to East Lake displayed a clear temporal and spatial heterogeneity.The centroid of East Lake moved northeast from 1995 to 2005 and southeast from 2005 to 2015.(3)The reduction in the area of East Lake was mainly affected by human activities.A lake area of about 4.8 km2 was converted to other land uses during 1995-2005,most of which was unused land,whereas from 2005 to 2015,0.43 km2 of the lake area was converted into built-up land,and 0.25 km2 was converted into other land uses.The reduction in area was caused by infrastructure construction by the government,the development of the real estate industry,illegal construction by villagers,and the development of scenic spots for tourism.The driving forces of this reduction included Wuhan's growing population,and the rapid development of the economy and urbanization between 1995 and 2015,which has resulted in a large demand for land.Finally,a formation mechanism model was constructed by analyzing the causes of East Lake's morphological evolution. 相似文献
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基于对国内文献的搜集和整理,从体育的内涵辨析和学科演进梳理着手,对体育人才、体育产业、体育活动以及体育场地与地理空间的关系4 个方面进行综述。研究发现:体育人才、体育产业、体育活动和体育场地均具有很强的地理特征和空间指向性,体育人才与地域文化和历史关系密切,体育产业受基本经济地理格局深刻影响,体育活动具有明显空间差异特征;体育场地是城市空间的重要组成部分;体育学科内涵在持续拓展,与地理学的交叉将是一个重要机遇;人文地理学在学科综合、关注视角、研究方法和技术手段等方面具有较好的学科优势,能够很好地参与体育研究,推动体育现象的全景揭示和深度解析。 相似文献
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