城市化对水域景观格局的时空影响
2016-10-19李庆玲刘艳芳
李庆玲 刘艳芳



摘要:使用武汉市城市圈Landsat TM(1987、1995、2000、2005、2011年)五期遥感影像,采用机器和目视解译相结合的方法得到土地利用信息,进而提取水域信息,分别从区域和市域尺度上探讨了武汉城市圈1987-2011城市化过程中水域景观格局的变化机制,对水域景观格局及其动态变化进行分析,探讨水域景观格局对城市化因子的时空响应。结果表明,在城市圈尺度上,城市化率、总人口、GDP以及建筑物面积等城市化因子均可以较好的预测水域景观格局的变化,但水域景观总面积与城市化因子的相关性较弱;在市域尺度上,不同城市影响水域景观格局变化的城市化因子不同,且影响程度存在差异;在城市圈和市域两个尺度上,水域景观变化与城市化的关系均呈现出随着经济发展、人口增加、非农人口比例增高、以及建设用地扩张(城市化强度提高),水域景观面积先减少再增加,景观破碎度降低,稳定性增强,形状趋于规则,水域景观聚集度增加的趋势。
关键词:水域;景观格局;城市化;武汉城市圈
中图分类号:Q149 文献标识码:A 文章编号:0439-8114(2016)08-1949-08
DOI:10.14088/j.cnki.issn0439-8114.2016.08.012
Abstract:In the paper,of land use information was obtained from five years of remote sensing images of Wuhan urban circle Landsat TM(1987,1995,2000,2005,2011) by combining machine and visual interpretation.Then water information was extracted.,The change mechanism of water landscape pattern in the process of the urbanization of Wuhan city circle during 1987 — 2011 was discussed from the scale of region and city, respectively. Water landscape pattern and its dynamic changes were also analyzed to explore the response of waters landscape pattern towards the factor of urbanization.the following conclusions were obtained:(1)In metropolitan scale,the factor of urbanization such as urbanization rate,the total population, GDP and urbanization building area can predict changes in water landscape pattern, but the correlation between the total area of water landscape and the urbanization factor was weak;(2)In the city region scale, the urbanization factor which affects the change of water landscape pattern is different in different cities,and there are differences in theimpact;(3)In metropolitan area and city scales,with the economic development,population increase,the proportion of non-agricultural population increased,as well as the expansion of construction land(urbanization strength increases),water landscape area firstly reduced and then increased,landscape fragmentation decreased but the stability increased,shape tends to be regular and the aggregation of water landscape increased.
Key words:water;landscape pattern;urbanization;Wuhan city circle
水域景觀是人类活动区域中最重要的开放空间,是自然要素最为密集、自然过程最为复杂的地域,对人类社会的发展起着重要作用[1]。目前的研究主要集中在对自然河道景观的历史演变上[2-6],对城市水域景观演变的研究相对较少,主要包括汪松年等[7]对上海市河流、湖泊淡水湿地历史变迁的分析,范今朝等[8]对杭州运河功能的历史变迁的研究。……
