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| 生态脆弱区土地利用格局变化及其驱动机制分析 ——以陕西榆林市为例 | |
| 引用本文： | 郭丽英,刘彦随,郭丽英,任志远.生态脆弱区土地利用格局变化及其驱动机制分析 ——以陕西榆林市为例[J].资源科学,2005,27(2):128-133. |
| 作者姓名： | 郭丽英 刘彦随 郭丽英 任志远 |
| 作者单位： | 1. 陕西师范大学旅游与环境学院,西安,710062;中国科学院地理科学与资源研究所,北京,100101 2. 中国科学院地理科学与资源研究所,北京,100101 3. 陕西师范大学旅游与环境学院,西安,710062 |
| 基金项目： | 国家自然科学基金，国土资源部科研项目，中国科学院知识创新工程项目 |
| 摘 要： | 榆林市地处北方毛乌素沙地向陕北黄土丘陵区的过渡地带,是典型的农牧交错生态脆弱区.20世纪80年代中期以来,随着特大型神(木)府(谷)煤田、靖边天然气田的开发建设,区内人口快速增长,工矿业规模日益增大,经济活动对土地环境的压力不断增强.本文将现代遥感和GIS技术与景观生态学的研究方法相结合,以1985年、1995年和2000年的3期Landsat TM遥感影像为基本信息,通过计算多样性指数、优势度、破碎化指数、分离度等指标,进行土地利用格局变化分析,并借助多元线性回归模型方法,揭示了榆林市土地利用格局变化的主导人文驱动机制. |
| 关 键 词： | 土地利用格局 驱动机制 生态脆弱区 榆林市 |
| 文章编号： | 1007-7588(2005)02-0128-06 |
| 修稿时间： | 2004年10月18 |
Analysis of the land landscape changes and its driving mechanism in vulnerable ecological area: a case study of Yulin city |
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| GUO Li-ying,LIU Yan-sui,GUO Li-ying,REN Zhi-yuan.Analysis of the land landscape changes and its driving mechanism in vulnerable ecological area: a case study of Yulin city[J].Resources Science,2005,27(2):128-133. | |
| Authors: | GUO Li-ying LIU Yan-sui GUO Li-ying REN Zhi-yuan |
| Abstract: | In this study we quantified land landscape change in the vulnerable ecological area of Yulin city between 1985 and 2000 using remote sensing and GIS in conjunction with landscape modeling. It was found that fallow land decreased by 125,147 hm2 while grassland and woodland increased by 107,975 and 17,157 hm2, respectively. The three most prominent changes were from fallow land to grassland at 129,926 hm2, and degradation of grassland from a higher cover density to a lower one at 16,996 hm2 , and from grassland to woodland at 15,651 hm2. The major factors responsible for these changes are identified as the change in the government policy on preserving the environment, continued growth in mining, and urbanization. It is concluded that as arid Yulin city has a highly vulnerable landscape that is sensitive to fluctuations in the natural environment and to changes in government land use policy. The efforts in restoring the deteriorated ecosystem have reaped certain benefits in reducing the spatial extent of sandy land through replacement by non-irrigated farmland, woodland and grassland. On the other hand, continued growth in mining and urbanization has exerted adverse impacts on the land landscape. At present regional economic development is in direct conflict with the protection of the natural environment. Such a conflict has caused the destruction to the land resources and fragmentation of the landscape accompanied by land desertification, even seriously in some localities. |
| Keywords: | land landscape patterns driving mechanism vulnerable ecological areas Yulin city |
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