基于3S的澜沧县土地利用景观格局变化研究

Study on the Landscape Pattern Changes Based on 3S in Lancang County

以澜沧县2005和2010年两期ETM影像解译数据为例,在3S和Fragstats软件支持下,分析了6 a间区域内景观格局的动态变化。结果表明,2005~2010年澜沧县各土地类型变化显著,除了灌木林和针叶林面积有所减少外,城镇居民用地、旱地、水田、桉树林、水域、荒地等地类面积均有不同程度的增加。景观类型转移变化表明,各土地类型间发生了相互转化,以灌木林、针叶林、阔叶林和荒地之间的转换最为显著。随着社会经济的快速发展,澜沧县景观整体斑块破碎化程度、形状指数呈下降趋势,斑块间的连通性呈增长趋势。

The landscape pattern changes of Lancang County in 6 years were analyzed by interpreting two sets of data from ETM remote sensing images in 2005 and 2010associated with GIS and Fragstats software.The results show that each land type change in Lancang County is significant from 2005 to 2010,except shrubbery and coniferous forest area has decreased,urban residential land,non-irrigated farmland,paddy fields,eucalyptus forests,waters,waste land and other type area have increased in varying degrees.The transformations of landscape from 2005 to 2010 demonstrated that there were mutual transformations between different types of land,majority of those transformations were transformed between shrubbery,coniferous forest,broadleaf forest and waste land.With the rapid development of social economy,the patch fragmentation degree of whole landscapes and shape index is decreased,while the connectivity between patches shows a rising trend in Lancang County.