摘要
运用Landsat系列卫星同期影像数据和聚类分析方法对夜间灯光数据进行了校正,继而使用基于辅助数据的比较法确定提取城镇建成区面积的阈值,在此基础之上选取了景观总面积、斑块密度和景观形状指数等总共8个典型景观格局指标,进而运用景观格局分析软件FRAG-STATS 4.2对体现1992—2013年共22年间长江中游城市群城镇发展空间格局演变的8个景观格局指标进行了计算。计算结果表明:在1992—2013年这22年间,长江中游城市群城镇化快速扩展,城镇建成区面积增幅达到7.02倍,斑块数量增幅为2.35倍,斑块密度的增加也较为明显,同时景观形状复杂度逐渐上升,中小城市不断壮大,同时也出现了较多的新兴小城镇,具体的,总边界长度和平均边界密度的年均增长速度分别为18.86%和18.87%,最大斑块指数和聚集度指数两个指标在整体上呈现出逐年下降的特征,但是在整体上所有的景观总面积、最大板块指数和平均边界密度等8个指标的演变过程均体现出一定的波动和无序化的特征。
The Landsat satellite image data and cluster analysis methods were used to correct the nighttime lighting data,and then the threshold value of the urban built-up area was determined using the comparison method based on auxiliary data.The total landscape area and patch were selected.A total of 8 typical landscape pattern indicators,such as density and landscape shape index,were used to calculate 8 landscape pattern indicators reflecting the spatial evolution of urban development in the middle reaches of the Yangtze River during 1992-2013 using the landscape pattern analysis software FRAG-STATS 4.2.The calculation results show that from 1992 to 2013,the urbanization of the urban clusters in the middle reaches of the Yangtze River rapidly expanded,the area of urban built-up areas increased by 7.02 times,the number of patches increased by 2.35 times,and the increase in patch density was also obvious.The complexity of shape gradually increased,and small and medium-sized cities continued to grow.At the same time,there were also a number of emerging small towns.Specifically,the average annual growth rate of the total boundary length and average boundary density were 18.86%and 18.87%,respectively.The largest patch index and the aggregation index presented the decline year by year,but overall the landscape area,the largest plate index,and the average boundary density all showed the characteristics of some fluctuations and disorder.
作者
钟洋
林爱文
ZHONG Yang;LIN Aiwen(School of Resource and Environmental Sciences,Wuhan University,Wuhan 430079,China;Key Laboratory of Geographic Information System,Wuhan 430079,China)
出处
《水土保持研究》
CSCD
北大核心
2018年第6期298-305,共8页
Research of Soil and Water Conservation
基金
国家自然科学基金(41301586)
国家自然科学基金国家基础科学人才培养基金(J1103409)
关键词
夜间灯光数据
长江中游城市群
基于辅助数据的比较法
空间格局
night light data
urban agglomeration in the middle reaches of Yangtze River
comparative method based on auxiliary data
spatial pattern
