摘要
基于遥感(RS)和地理信息系统(GIS)相结合的技术方法,以长江上游典型山区巴州区为例,分析了1991-2004年间土地利用/覆盖变化(LUCC)在数量、结构、类型和空间分布上的特点。通过ArcView软件,选取最大斑块指数、面积加权平均形状指数、散布与并列指数、景观多样性、均匀度等指数,计算出土地覆盖变化值和景观格局分析指标,并对该区域土地利用变化和空间景观结构变化进行研究。研究结果表明:①13年间,耕地和水域面积分别减少59.47 km2和9.77 km2,建设用地和林地分别增加58.08km2和7.51km2;②在结构变化上,耕地主要向林地转变,建设用地的增加主要源于旱地、水田和林地的转变,林地的变化主要是林地内部自身的结构调整;③耕地和林地是该区域的主导景观类型,景观格局正朝着多样性、均匀化方向发展,并针对这种状况,提出了土地可持续利用建议。
Based on the integrated techniques of remote sensing(RS) and geographic information system(GIS),this paper takes the Bazhou county(a typical mountainous area in the upper region of the Yangtze River)as an example to extract the quantities,inner structure,types and spatial distribution features of land use/cover change(LUCC) from 1991 to 2004.The indices related to largest patch,area-weighted shape,interspersion juxtaposition,landscape diversity and evenness are chosen.Then the landscape spatial structure and heterogeneity were analyzed by FRAGSTATS calculation method.The conclusion may be distinguished as follows:①the cultivated land and water area decreased by 59.47 km2 and 9.77 km2 respectively while the construction land and woodland increased by 58.08km2 and 7.51km2;②in the structure of land use/cover change,the cultivated land was mainly changed into woodland,the increase of the construction land was mainly from the conversion of the cultivated land and the woodland,and the change of the woodland was mainly from the inner-change of itself;③the cultivated land and woodland are the dominant landscape types in this region.The landscape spatial pattern has tended to become fragmented and diversified.Some sustainable developmental countermeasures are put forward according to the research result.
出处
《中国人口·资源与环境》
CSSCI
北大核心
2010年第S1期63-67,共5页
China Population,Resources and Environment
基金
国家自然科学基金面上项目(No.40771191)资助
