By using maximum likelihood classification, several landscape indexes have been adopted to evaluate landscape structure of the irrigated area of Hongsibao Town, and landscape pattern and dynamic change of Hongsibao in...By using maximum likelihood classification, several landscape indexes have been adopted to evaluate landscape structure of the irrigated area of Hongsibao Town, and landscape pattern and dynamic change of Hongsibao in 1989, 1999, 2003 and 2008 had been analyzed based on landscape patch, landscape type and transfer matrix. The results show that landscape pattern had changed obviously, patch number, fragmentation and dominance had increased, evenness had decreased, and landscape shape had become regular in the irrigated area of Hongsibao Town from 1989 to 2008. The primary landscape type in 1989 was grassland and in 2008 was sand, directly influenced by human activities.展开更多
以2.5 m SPOT融合数据为基础,采用面向对象的自动分类技术,获取了密云水库上游地区1∶10 000比例尺土地利用分类图,并利用FRAGSTATS软件定量分析了研究区的景观格局特征。研究表明:林、灌、草等植被类型占据了研究区的85%以上面积,而且...以2.5 m SPOT融合数据为基础,采用面向对象的自动分类技术,获取了密云水库上游地区1∶10 000比例尺土地利用分类图,并利用FRAGSTATS软件定量分析了研究区的景观格局特征。研究表明:林、灌、草等植被类型占据了研究区的85%以上面积,而且破碎化程度较低、结构完整,对研究区水源涵养有利;耕地、建设用地、未利用地等类型所占比例虽小,却是造成整体景观类型分散、破碎化程度高的主要原因,因此,在保护植被的同时,应加紧对这些类型的治理与管理。展开更多
文摘By using maximum likelihood classification, several landscape indexes have been adopted to evaluate landscape structure of the irrigated area of Hongsibao Town, and landscape pattern and dynamic change of Hongsibao in 1989, 1999, 2003 and 2008 had been analyzed based on landscape patch, landscape type and transfer matrix. The results show that landscape pattern had changed obviously, patch number, fragmentation and dominance had increased, evenness had decreased, and landscape shape had become regular in the irrigated area of Hongsibao Town from 1989 to 2008. The primary landscape type in 1989 was grassland and in 2008 was sand, directly influenced by human activities.
文摘以2.5 m SPOT融合数据为基础,采用面向对象的自动分类技术,获取了密云水库上游地区1∶10 000比例尺土地利用分类图,并利用FRAGSTATS软件定量分析了研究区的景观格局特征。研究表明:林、灌、草等植被类型占据了研究区的85%以上面积,而且破碎化程度较低、结构完整,对研究区水源涵养有利;耕地、建设用地、未利用地等类型所占比例虽小,却是造成整体景观类型分散、破碎化程度高的主要原因,因此,在保护植被的同时,应加紧对这些类型的治理与管理。
