干旱区生态环境知识资源中心(Arid): 敦煌市土地利用/覆盖变化特征及成因分析

Arid

	敦煌市土地利用/覆盖变化特征及成因分析
其他题名	Characteristics and cause analysis of land use/cover change in Dunhuang City
	杨丽娜; 牛叔文; 马利邦; 李怡欣
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2010
卷号	29 期号:4 页码:766-775
中文摘要	利用ArcGIS 9.2软件,结合野外调查,对敦煌市1987、1996和2007年3期Landsat5-TM遥感影像进行解译,并分8个类型分析了土地利用/覆盖变化的特征及成因.结果表明:近20年来敦煌市呈现出植被覆盖程度不断降低、覆盖面积减小的趋势,其中耕作区、城建用地和无植被区面积净增,其他5类用地面积净减;8类用地类型之间互有转换,转移的主要方向是部分草地和无植被区转变为耕作区,水域湿地和灌木林地转变为草地,草地由高覆盖、中覆盖、低覆盖到无植被区逐次转变;除了耕作区边缘植被覆盖程度有所增加外,其他区域退化趋势明显;引起LUCC的自然因素中气温升高的影响较大,而人文因素中土地开垦、增加灌溉的影响较大.
英文摘要	By using ArcGIS 9.2 software in combining with field survey,the Landsat5-TM remote sensing images of Dunhuang City in 1987,1996,and 2007 were interpreted.A total of eight land use/cover types were obtained,and the characteristics and causes of the land use/cover change were analyzed.In the past 20 years,the vegetation coverage in the City had a declining trend,and the coverage area was decreasing.Among the eight land use types,the cropland,urban construction land,and non-vegetation land had a net increase in their area,while the other five land use types presented a net decrease.There were inter-conversions among the eight land use types,and the main directions were:parts of grassland and non-vegetation land transformed into croplands,parts of wetland and shrub land transformed into grassland,and high coverage grassland was successively transformed into medium coverage grassland,low coverage grassland,and non-vegetation land.Except that the vegetation coverage in the edge area of cropland had somewhat increase,the vegetations in the other areas degenerated obviously.Elevated air temperature was the important natural factor affecting the land use/cover change,and land reclamation and irrigation were the important human factors affecting this change.
中文关键词	土地利用/覆盖类型 ; 绿洲植被 ; 转移矩阵 ; 敦煌市
英文关键词	land use/cover type oasis vegetation transfer matrix Dunhuang City.
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:3849620
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225558
作者单位	兰州大学资源环境学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	杨丽娜,牛叔文,马利邦,等. 敦煌市土地利用/覆盖变化特征及成因分析[J]. 兰州大学,2010,29(4):766-775.
APA	杨丽娜,牛叔文,马利邦,&李怡欣.(2010).敦煌市土地利用/覆盖变化特征及成因分析.生态学杂志,29(4),766-775.
MLA	杨丽娜,et al."敦煌市土地利用/覆盖变化特征及成因分析".生态学杂志 29.4(2010):766-775.