基于小波分析长株潭核心区土地利用变化尺度特征研究
作者简介:傅丽华(1971-),女,湖南永州人,副教授,博士研究生,主要从事景观生态与土地利用研究。E-mail: lihuaf88@163.com
收稿日期: 2011-06-16
要求修回日期: 2011-11-09
网络出版日期: 2012-01-20
基金资助
湖南省教育厅优秀青年项目(11B036)、湖南省国土厅2010年科学研究项目(2010-23)、湖南省科技厅软科学研究课题(2009zk3165)资助
Scale Characteristics of Land Use Change in Changsha-Zhuzhou-Xiangtan Core Area Based on Wavelet Analysis
Received date: 2011-06-16
Request revised date: 2011-11-09
Online published: 2012-01-20
Copyright
根据长株潭核心区1989~2008年4期遥感影像数据资料,提取区域土地利用变化数据。以湘江样带为典型研究区,运用小波分析方法对样带内的典型样线进行分析,得到时间及位置变化对土地利用特征尺度值的差异。分析结果表明,长株潭核心区不同部位的特征尺度选择不是唯一的,具有不同的尺度敏感性。长株潭城市建成区土地利用类型最为单一,对于尺度变化最不敏感,适宜采用3 300 m左右的平均粒径为特征分析尺度;城市边缘区土地利用变化的尺度敏感性最强,特征尺度采用1 980 m左右的分析粒径为宜;长株潭生态绿心区域对土地利用变化的尺度敏感性较强,以3 060 m的平均粒径为特征尺度。
傅丽华 , 谢炳庚 , 何燕子 , 仇应山 , 朱康 . 基于小波分析长株潭核心区土地利用变化尺度特征研究[J]. 地理科学, 2012 , 32(1) : 60 -65 . DOI: 10.13249/j.cnki.sgs.2012.01.60
Changsha, Zhuzhou and Xiangtan, the key components of Changsha-Zhuzhou-Xiangtan urban agglomeration and the core growth pole of economic development in Hunan province, have been accelerating their economic and social development and their urbanization in recent years. Their high-speed urbanization is the main reason for the significant changes in the land use structures and functions in Changsha-Zhuzhou-Xiangtan core area. Therefore, research of regional land use change will exert a positive and significant influence on enhancing the harmony among land use, urban environment, economic and social development, and helping satisfy the requirements both the human living and ecological protection. Wavelet analysis, which emerged in the 1990s, is a mathematical tool for multi-scale analysis. It specializes in land use pattern analysis from frequency and scale, linking spatio-temporal pattern with scale and location. This analysis, though widely applied in ecology, has never been adopted in exploring scale characteristics of land use change in urban agglomeration. It must be a significant attempt to adopt wavelet analysis in exploring the scale characteristics of land use change in the core area of Changsha-Zhuzhou-Xiangtan, for its results will help to explain the spatial heterogeneity and scale sensitivity and further, the driving mechanism in regional land use change, and provide an important basis for response analysis of the scale of landscape change. The research is carried on the relationship between time and location and land use change characteristics scale from a wavelet analysis on typical transect line of the belt along the Xiangjiang River as the typical land use region based on the data of land use change extracted from the remote sensing image data in four periods from 1989 to 2008. The result shows that the different degrees of sensitivity of each quarter of the Changsha-Zhuzhou-Xiangtan core area to scale change determine their selection in land use characteristic scale, which is supported by 1) The quarter around the city centre, which is of a relatively single land use type, is the least sensitive to scale change, thus about 3 300 m parcel analysis being the most appropriate; 2) The urban fringe quarter is the most sensitive to scale change, thus about 2 000 m parcel analysis being the most appropriate; and 3) The green heart of Changsha-Zhuzhou-Xiangtan, the combination quarter of the three cities, is moderately sensitive to scale change, thus about 3 000 m parcel analysis being the most appropriate.
Table 1 Land use change of core area in Changsha-Zhuzhou-Xiangtan in 1989-2008表1 1989~2008年长株潭核心区土地利用面积变化 |
1989~ 1996年 | 1996~ 2000年 | 2000~ 2008年 | |
---|---|---|---|
林地 (km2) | -7.658 | 13.077 | -16.951 |
草地 (km2) | 0.094 | -0.544 | 0.299 |
水域 (km2) | -0.174 | -2.238 | 1.122 |
耕地 (km2) | -0.106 | -18.290 | -39.897 |
建设用地 (km2) | 8.730 | 7.704 | 55.615 |
未利用土地 (km2) | -1.548 | 0.287 | -0.178 |
Fig. 1 Land use change and transect selection in 2000-2008图1 2000~2008年土地利用变化及样带选择 |
Fig. 2 Sketch map of transect line selection图2 小波分析样线选择 |
Fig. 3 Variance curve of the northern transect line in 1989 and 2008图3 1989、2008年样线北段小波方差变换曲线对比 |
Fig. 4 Variance curve of the middle transect line in 1989 and 2008图4 1989、2008年样线中段小波方差变换曲线对比 |
Fig. 5 Variance curve of the southern transect line in 1989 and 2008图5 1989、2008年样线南段小波方差变换曲线对比 |
The authors have declared that no competing interests exist.
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