摘要
以西宁市1995、2003、2010年三期Landsat遥感影像为信息源,应用Erdas9.2、Fragstats3.3和SPSS16.0,通过动态度、景观指数,定量分析了西宁市城区15年来土地利用动态变化和景观破碎化时空演变特征。结果表明:1)研究区建设用地和林地15年间持续增长,净增长分别为4068.09hm2和1473.39hm2;耕地与裸地持续减少,净减少分别为4058.28hm2和1481.85hm2。2)土地利用动态变化特征显著,各景观类型阶段性差异明显。1995-2003年间,建设用地、林地、耕地、裸地及水体的动态度分别为4.93%、2.44%、-4.00%、-1.54%和-0.02%;2003-2010年间,分别为2.85%、0.56%、-2.38%、-3.17%和-0.02%。3)近15年来研究区土地景观破碎化程度加剧,但是1995-2003年和2003-2010年间的阶段性差异较大,表现为出现以建设用地为主的优势斑块以及其他景观类型的不均衡发展。
Spatiotemporal evolution processes of land use dynamic change and landscape fragmentation change in Xining city were quantitatively analyzed through dynamic attitude,landscape index in this paper. The analysis used three phases of Landsat remote sensing image of 1995,2003,2010 for information source,and Erdas9. 2, Fragstats3. 3 and SPSS16. 0 software were used. The results showed that：（ 1） In study area,construction land and woodland continued to grow,net growthes were 4068. 09hm2and 1473. 39hm2respectively for 15 years,cultivated land and bare land continued to decrease,net dereases were 4058. 28hm2and 1481. 85hm2respectively.（ 2） The land use dynamics were significant differences among the landscape type stages. In 1995-2003,the construction land,woodland,arable land,bare land and water dynamic degcees were 4. 93%,2. 44%,4. 00%,1. 54% and0. 02% respectively; In 20032010,they were 2. 85%,0. 56 %,2. 38%,3. 17% and0. 02%.（ 3） land landscape fragmentation degree intensified for the past 15 years in study area,but the phase difference between the 19952003 and 20032010 was fairely great,It showed that the dominant patchbased construction land and other landscape types did not balancet.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2014年第4期35-41,共7页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金项目(41161028)资助
关键词
特征
景观破碎化
RS
西宁市
characteristics
landscape fragmentation
RS
Xining
