干旱区生态环境知识资源中心(Arid): 运用线性光谱混合模型解析城市绿色空间格局:乌鲁木齐市的实证研究

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	运用线性光谱混合模型解析城市绿色空间格局:乌鲁木齐市的实证研究
其他题名	Patterns of urban green spaces based on linear spectral mixture model: an empirical study in Urumqi
	王占永 1; 徐建华 1; 吕光辉2 ; 张治华 1; 胡青 1
ISSN	1000-5641
出版年	2008
期号	6 页码:40-50,74
中文摘要	运用线性光谱混合模型并引入植被景观指数解析乌鲁木齐市绿色空间格局及变化特征,为定量评价干旱区绿洲生态环境提供更精确的方法.结果表明:(1)植被盖度与植被指数整体相关性较好,但植被盖度更能反映像元尺度上植被信息较弱的城市植被景观;(2)13年内,植被丰度整体下降明显,存在郊区绿地面积锐减、建成区绿地破碎化程度加剧及空间分布不协调等发展问题;(3)从建成区植被类型看,中、高丰度植被面积缩减最大,低丰度植被面积变化不大但其破碎化程度最大,以低丰度植被占主导的城市绿地结构单一化趋势明显,城市绿色生态系统较不稳定.
英文摘要	The pattern of urban green spaces and its variation characteristic in Urumqi were analyzed under a linear spectral mixture model as well as vegetation landscape index,to provide a more accurate method in quantitative evaluation for ecological environment of oasis cities in arid areas.The results indicate that,(1) In terms of the region as a whole,the relevance of vegetation fraction and vegetation index is closer,but vegetation fraction is better able to reflect urban vegetation landscape with weak vegetation information at pixel scale.(2) In the past 13 years,the vegetation abundance has declined obviously overall in the study area and the serious problems of urban ecological development in Urumqi are remarkable,just like green coverage falling sharply in outskirts,greenbelt fragmentation intensifying in built-up area,spatial distribution of greenbelt being incompatible and others.(3) Viewed from vegetation types in built-up area,the vegetation with medium and high abundance has shrunk largest in area and the area of low abundance vegetation hasn’t changed much,but the fragmentation of low abundance vegetation is most serious.Moreover,the structure of urban greenbelt based on the principle of low abundance vegetation trends single obviously,which will result in instability in urban green ecosystems.
中文关键词	线性光谱混合模型 ; 端元 ; 绿色空间 ; 时空变化 ; 乌鲁木齐
英文关键词	linear spectral mixture model endmember green space spatiotemporal variation Urumqi
语种	中文
国家	中国
收录类别	CSCD
WOS类目	REMOTE SENSING
WOS研究方向	Remote Sensing
CSCD记录号	CSCD:3442640
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222521
作者单位	1.华东师范大学, 地理信息科学教育部重点实验室, 上海 200062, 中国; 2.新疆大学, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国
推荐引用方式 GB/T 7714	王占永,徐建华,吕光辉,等. 运用线性光谱混合模型解析城市绿色空间格局:乌鲁木齐市的实证研究[J]. 新疆大学,2008(6):40-50,74.
APA	王占永,徐建华,吕光辉,张治华,&胡青.(2008).运用线性光谱混合模型解析城市绿色空间格局:乌鲁木齐市的实证研究.(6),40-50,74.
MLA	王占永,et al."运用线性光谱混合模型解析城市绿色空间格局:乌鲁木齐市的实证研究"..6(2008):40-50,74.