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简介:ThefeaturesofphysicalgeographyinthetransitionalregionbetweenQinlingMountainsandHuanghuaiPlainpossesstransitionalcharactersevidentlyintwodirections:oneisfromthewesternmountaintotheeasternplainandtheotherisfromsouthernsubtropicalzonetonortherntemperatezone.Torrentialrain,especiallystrongtorrentialrainisfrequentinthetransitionalregion,andtherearemanytorrentialraincenters.Amajorityoftorrentialrainisdistributedamong100-200masl.Thewintertemperatureat100-400maslishigherthanthatinHuanghuaiPlainwhosealtitudeislowerthanthatofthetransitionalregion,andthehighesttemperatureinJanuaryappearsat350-400masl.Thethicknessofwarmslopebeltinthetransitionalregionvariesfrom100mto250masl.Theformationoftorrentialrainandwarmslopebeltistheresultofjointactionofatmosphericcirculationandlocalterrain.Frequenttorrentialrainsandwarmslopebelthadtremendousinfluencesonthesoilproperties,plantdistributionandlocalclimateinthetransitionalregion.
简介:闽东北木拱廊桥建筑群是一个独特的地理建筑,很好的诠释了建筑与自然环境的关系,体现了建筑与周围的自然和人文环境同存共息关系.闽东北木拱廊桥建筑在技术应用上,结合人文的、生态的、经济的、地区的等进行不同程度的革新,推动新的桥梁建筑艺术的创造,是特殊自然条件的建筑拓展空间、延伸空间的典型.闽东北木拱廊桥建筑群在闽东北得以出现和保留与闽东北社会经济的发展过程有密切的关系,从地理学视角解读闽东北木拱廊桥建筑群是闽东北木拱廊桥研究的一个全新命题.
简介:基于第一次地理国情普查数据和“全国生态环境十年变化(2000—2010年)遥感调查与评估项目”的生态评价指标体系,从生态系统格局、生态系统质量、生态系统功能和生态系统胁迫这四个方面对厦门市进行生态评估,建立生态评价指标体系。结果表明:1)厦门市森林生态系统占最大比重,建筑用地从东南沿海地区向西北内陆地区逐渐递减。2)全市林地和园地的相对生物量密度、叶面积指数为较高水平;而草地覆盖度大多为中低水平;耕地的年均净初级生产力较高。3)厦门市土壤保持、水文调节等功能总体处于较低水平,等级高的区域主要集中在西北地区,其他区域较低。厦门市食物供给以同安和翔安区为主。4)厦门市岛内两区(湖里区、思明区)人类活动胁迫相对其他各区较为严重,这和岛内两区人口密度、交通网密度、GDP等较大有一定的联系。