近40年来酒泉肃州绿洲时空变化及景观稳定性  

Spatio-temporal changes and landscape stability of Suzhou Oasis,Jiuquan in the recent 40 years

作　　者：巩杰[1] 张玲玲[1] 孙朋[1] 

机构地区：[1]兰州大学西部环境教育部重点实验室西部环境与气候变化研究院,兰州730000

出　　处：《兰州大学学报（自然科学版）》2014年第3期398-404,共7页Journal of Lanzhou University(Natural Sciences)

基　　金：中央高校基本科研业务费专项资金项目(lzujbky-2013-m02);教育部“春晖计划”科研项目(Z2011028)

摘　　要：选取1973,1977年的MSS,1980年的卫星航片以及1986-2013年9个典型期的Landsat TM/ETM+遥感影像作为数据源,结合实地调查等进行解译分类和验证,利用ArcGIS 9.3,Fragstats 3.3和相关统计方法,对肃州绿洲时空变化及绿洲稳定性进行分析研究.结果表明:近40年来,肃州绿洲空间变化表现为扩张和萎缩并存,整体上以扩张为主;绿洲面积总体上呈增加趋势,从1973年的945.49 km2增加到2013年的1190.09 km2,增长幅度达20.55%.绿洲变化表现出空间和时间尺度上的不均衡性,扩张和萎缩变化区域分布较零散,扩张多发生在绿洲--荒漠交错带和绿洲内部,表现为绿洲内部填充和边缘扩张,变化剧烈区域主要集中在三墩镇东北角和北部边缘区(即鸳鸯池水库周边)、总寨镇东部、上坝镇和下河清乡.近40年来肃州绿洲的景观稳定性呈现增强趋势.研究对干旱区绿洲水土资源高效利用和景观管理具有一定的参考价值.The study of oasis changes is a vital research topic of environmental change and sustainable devel-opment in the arid area. Based on a series of remote sensing data from 1973 to 2013 and combined with on-site investigations, GIS techniques and statistical methods were used to study the spatio-temporal change and the stability of Suzhou Oasis from 1973 to 2013. The results showed that： 1） In the latest 40 years, the area of Suzhou Oasis increased generally, and varied between expansion and shrinkage in the spatial scale, while the expansion has been the main one. The area increased from 945.49 km2 to 1 190.09 km2 from 1973 to 2013 with an increase degree of 20.55%. 2） The variations of Suzhou Oasis showed an imbalance on the spatial and temporal scales. Moreover, the areas of expansion and shrinkage distributed more fragmented and the expansion occurred in the edge zone of the oasis with the form of internal padding and edge expansion. In addition, the rapidly changing areas were mainly concentrated in the northeastern part and the northern edge of Sandun Township （the area around the Yuanyangchi Reservoir）, the eastern part of Zongzhai Township, Shangba Township and Xiaheqing Township. 3） The stability of Suhou Oasis gradually increased from 1973 to 2013. The research results should be a useful reference for the efficient exploitation of the limited soil and water resource and oasis landscape management in arid areas of China.

关 键 词：绿洲 时空变化 景观稳定性 肃州 

分 类 号：P951[天文地球—自然地理学]