摘要
在3S技术的支持下,分别以秦岭东部商南县和西部略阳县的1978年多波段扫描仪(MSS)、1990年专题制图仪(TM)、2001年增强型专题绘图仪(ETM)和2006年专题制图仪(TM)影像图为基础,提取并分析了秦岭东西两县森林景观类型的时空变化.结果表明,从景观类型看,商南县以阔叶林和灌丛为主,分别占57.63%、18.51%,略阳县以阔叶林、针叶林和灌丛为主,分别占39.74%、17.69%和17.20%,近30年两县各类森林景观的变化趋势和幅度存在明显差异,商南县的变化幅度大于略阳县.从景观结构看,商南县各景观类型的分离度、破碎度指数的变化大于略阳县,即近30年来商南县各森林景观人为干扰的程度大于略阳县,人口、工业化程度、农业发展情况以及政府政策是引起两县森林景观类型差异性的主要原因.
Based on eight remote sensing images （MSS in 1978,TM in 1990,ETM in 2001 and TM in 2006 of Shangnan County in the eastern Qinling Mountains and of Lueyang County in the western area）,spatial-temporal changes of the forest landscape types were collected and analyzed with the support of 3S Technology. The results showed that broad forest and shrub are the two main landscape types in Shangnan county,covering 57.63% and 18.51% of the area,respectively. In Lueyang county,the dominant landscape types are broad forest,coniferous forest and shrub,which make up 39.74%,17.69% and 17.20% of the area,respectively. During the last 30 years,the trends and range of the forest landscape changes are different for the two counties,and the higher value was found in Shangnan County. The landscape separation degree and fragmentation index in Shangnan County are also higher than those in Lueyang County,which indicates that more human-made disturbances have occurred in the forest ecosystem in Shangnan County. The differences in population,the level of industrialization and agricultural development and local governmental policies for the two counties lead to the differences in forest landscape types.
出处
《环境科学学报》
CAS
CSCD
北大核心
2010年第5期1101-1106,共6页
Acta Scientiae Circumstantiae
基金
国家科技基础性专项重点项目(No.2007FY110800)
西北大学研究生创新教育项目(No.08YJC08)~~
关键词
森林景观类型
时空变化
3S技术
商南县
略阳县
forest landscape types
spatial-temporal change
3S technology
Shangnan county
Lueyang county
