干旱区生态环境知识资源中心(Arid): 土地利用类型变化对沙漠化过程的影响以科尔沁沙地为例

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	土地利用类型变化对沙漠化过程的影响以科尔沁沙地为例
其他题名	Effects of Land Use on Desertification in Typical Regions in the Horqin Sandy Land
	张继平; 常学礼; 蔡明玉; 李健英
ISSN	1001-4675
出版年	2009
卷号	26 期号:1 页码:39-44
中文摘要	以内蒙古奈曼旗1975,1985,1995年和2005年4期遥感影像为信息源,在3s技术支持下,对不同时期土地利用及各类型沙地的动态变化进行分析.结果表明:耕地和沙地是土地利用的主要类型,分别占总面积的40.33%,40.14%.近30年来,林地、耕地的增加幅度最大,分别由22827 hm~2,207493 hm~2增加到121375 hm~2,331442 hm~2.草地减少幅度最大,南120 751 hm~2减少到13 299hm~2,主要土地利用转移方向为:草地转化为耕地,沙地转化为耕地,耕地转化为林地.从沙地的空间格局特点来看,沙地占研究区总面积的40%以上,其中以固定沙地的分布为主,在50%以上.从变化趋势来看,沙地面积呈下降趋势,沙漠化程度指数由0.24下降到0.19,沙漠化过程正处于全面逆转期.沙漠化的逆转主要表现为沙地向耕地和林地的转化,沙漠化的发展主要表现为草地和耕地向沙地的转化.
英文摘要	In this study, the composition and spatial change of land use structure and sandy land was evaluated using data derived from the TM images of Naiman Banner in Inner Mongolia obtained in 1975, 1985, 1995 and 2005 under the support of 3S. The results revealed that the study area was primarily comprised of cultivated and sandy land. Specifically, cultivated and sandy land occupied 40.33% and 40.14% of the total study area, respectively. Furthermore, the results revealed that woodland and cultivated land increased more than any other types of land, as indicated by increases from 22 828 hm~2 and 207 493 hm~2 to 121 375 hm~2 and 331 442 hm~2, respectively.Conversely, the meadow area was reduced from 120 751 hm~2 to 13 299 hm~2. Overall, these results indicate that some meadow and sandy land was transformed to cultivated land, and some cultivated land was transformed to woodland. In addition, sandy land occupied more than 40% of the total study area, and these areas were dominated by fixed dunes, which occupied more than 50% of the total sandy land area. However, over the study period,the sandy land area was reduced, and the desertification index decreased from 0. 24 to 0.19, which indicates that desertification was reversed. Areas in which desertification was reversed reflect conversion of sandy land to cultivated land and woodland, whereas areas in which desertification was expanded reflect the conversion of meadows and cultivated land to sandy land.
中文关键词	土地利用 ; 沙漠化 ; 动态变化 ; 奈曼旗 ; 科尔沁沙地 ; 内蒙古
英文关键词	land use desertification dynamic change Naiman Banner
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURAL ECONOMICS POLICY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3564378
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223590
作者单位	鲁东大学地理与规划学院, 烟台, 山东 264025, 中国
推荐引用方式 GB/T 7714	张继平,常学礼,蔡明玉,等. 土地利用类型变化对沙漠化过程的影响以科尔沁沙地为例[J],2009,26(1):39-44.
APA	张继平,常学礼,蔡明玉,&李健英.(2009).土地利用类型变化对沙漠化过程的影响以科尔沁沙地为例.,26(1),39-44.
MLA	张继平,et al."土地利用类型变化对沙漠化过程的影响以科尔沁沙地为例".26.1(2009):39-44.