干旱区生态环境知识资源中心(Arid): 近15年来民勤湖区土地利用/覆盖动态与格局

Arid

	近15年来民勤湖区土地利用/覆盖动态与格局
其他题名	Dynamic analysis of land use/change and landscape pattern in lake-area of Minqin in recent 15 years
	颉耀文; 袁春霞; 张晓东
ISSN	1000-6060
出版年	2009
卷号	32 期号:3 页码:423-429
中文摘要	以1991年、1998年和2005年三期TM数据和其它辅助数据为基础,将遥感、GIS技术与景观格局分析方法相结合,在计算了土地利用程度综合指数、单一和双向动态变化以及面积、分维数、多样性、破碎度、优势度等景观指标的基础上,对近15年来民勤湖区的土地利用/覆盖变化进行了分析.结果表明,15年间各土地利用类型面积都有不同程度的增减,以耕地、荒漠草地和未利用土地的面积变化最为显著,其中耕地面积增长了9 385.47 hm~2,未利用土地面积减少8 616.87hm~2,荒漠草地面积减少949.49 hm~2;各土地利用类型之间的动态转化比较复杂,其中以沙地、林地和草地的空间变动程度较大;湖区整体景观异质性降低,多样性下降,优势度上升,15年来景观格局发生了较大变化;从宏观上看,荒漠进一步向绿洲逼近,绿洲有向西南方向后退的趋势.
英文摘要	Land use/ coverchanges (LUCC) such as desertification, forest degradation, has induced the reduction environment services, with large negative consequences for mankind. The study addressed the analysis of LUCC and landscape patterns in lake-area of Minqin during the recent 15 years, where the ecological environment has been de-teriorating for many years in Gansu Province. The results contribute to the understanding of how land use-cover and landscape patterns change in study area. The data were derived from LANDSAT TM5 imagery acquired in 1991, 1998 and 2005 respectively, in addition some auxiliary data of this area were used in the research. All the analysis were based on RS, GIS technology and many indices computed for analysis of LUCC and landscape index, such as land-use composition index, land-use degree index, the fractal dimensions, diverse index, the superiority, the broken and so on. These conclusions can be drawn as follows: (1) The main land use type in study area are farmland, urban and build-up, and unused land. The analysis shows that land use types have remarkably changed during 1994-2005 ,in which the farmland area has been increased by 9 385. 47 hm~2 and sandy area increased by 4. 79% ;The land use composition index in recent 15 years also increased,however, the exploitation degree trend was opposite; land-use types interchange intricately and human activities influence the change intensively; (2 ) Lake-area’s land-scape pattern changed significantly. The landscape indices indicated that the fragmentation of grassland patch has become bigger and its distribution isdispersed, the pattern of farmland tends to be contiguous and convergent; at landscape level, diversity declined, dominance raised and the landscape heterogeneity reduced; (3) On the macro-level, the oasisi was drifted 348.67 m to the southwest. The ecological environment of lake-area became worse.
中文关键词	民勤湖区 ; 土地利用/覆盖 ; 格局 ; 动态变化 ; 遥感与GIS
英文关键词	lake-area of Minqin land use/cover pattern dynamic change RS and GIS
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:3761627
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/2XILL650/223553
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	颉耀文,袁春霞,张晓东. 近15年来民勤湖区土地利用/覆盖动态与格局[J]. 兰州大学,2009,32(3):423-429.
APA	颉耀文,袁春霞,&张晓东.(2009).近15年来民勤湖区土地利用/覆盖动态与格局.,32(3),423-429.
MLA	颉耀文,et al."近15年来民勤湖区土地利用/覆盖动态与格局".32.3(2009):423-429.