城市近郊区景观格局特征分析——以贵阳市为例

Analysis of Landscape Pattern Characteristics in Urban suburb——Take Guiyang as an Example

以贵阳市1999年、2009年、2019年三期遥感图像为基础数据,基于RS和GIS技术,结合Fragstats4.2软件,对贵阳市20年的景观格局变化进行研究,受城镇快速扩张和工业化快速推进影响,贵阳市城市景观格局发生了一系列变化:(1)研究区1999—2019年,除耕地外,其余景观面积有不断增长的趋势,其中建设用地面积增加了283.5 km2、林地增加了624.425 km2、水体面积增加了238.84 km2、耕地面积在原有基础上持续减少1146.82 km2;(2)1999年以来,景观转化主要存在于建设用地、耕地和林地之间,从研究分类来看,4种分类中有3类存在相互转换关系,总体趋于稳定;(3)从破碎度指数来看,各类景观受人为和自然灾害干扰,朝着破碎化方向发展,直接导致景观格局发生巨大转变。

Based on the three phases of remote sensing images of Guiyang in 1999,2009,and 2019,based on RS and GIS technology,combined with Fragstats4.2 software,the study of the changes in the landscape pattern of Guiyang in the past 20 years is affected by the rapid urban expansion and rapid industrialization.As a result,a series of changes have taken place in the urban landscape pattern of Guiyang City:(1)In the study area from 1999 to 2019,except for arable land,the rest of the landscape area has a trend of increasing,of which the area of construction land increased by 283.5 km2 and the forest land increased by 624.425.km2,the area of water bodies increased by 238.84 km2,and the area of cultivated land continued to decrease by 1146.82 km2 on the original basis;(2)Since 1999,landscape transformation has mainly existed between construction land,cultivated land and forest land.From the perspective of research classification,4 species In the classification,there are three types of mutual conversion relationships,and the overall trend is stable;(3)From the perspective of fragmentation index,various landscapes are disturbed by man-made and natural disasters and develop in the direction of fragmentation,which directly leads to a huge change in the landscape pattern.