基于eCognition和ALOS影像的南盘江流域(云南段)景观生态格局分析

以2010年的ALOS影像为数据源,在eCognition的支持下进行南盘江流域(云南段)的景观生态分类,并采用景观指数分析法进行格局分析。结果表明:研究区总面积为43 276.52 km2,总斑块数为21 680个,分为17种景观生态类型;以暖温性针叶林、暖温性灌丛和灌草丛、旱地的面积最大,共占流域总面积的83.25%,为流域的景观基质;其中暖温性针叶林面积最大,为14 538.89 km2,占流域总面积的33.6%;暖温性灌丛和灌草丛面积为12 720.131 km2,占29.39%;旱地面积为8 766.45 km2,占20.26%。流域内整体斑块密度为0.501个/km2,其中最大为旱地,为0.147 7个/km2;边界密度为27.72,景观形状指数为144.16,整体的Shannon多样性指数为1.68,蔓延度指数为64.49;景观整体破碎度低,连通性较好,类型分布交错,景观格局较为复杂。

Landscape Ecological Patterns Analysis of NanpanRiver Basin(Yunnan Part) Based on eCongnition and ALOS Images

In this study,we used 2010 ALOS image as remote sensing data and eCognition software for present landscape ecological pattern mapping of the Nanpan River basin(Yunnan part),and the landscape ecological patterns were analyzed by landscape index.The results showed that the Nanpan River basin of Yunnan part is the total area of 43 276.52 km2,and the total patch of 21 680,it was divided 17 landscape ecological types,but the number of patch and area in each landscape ecological patterns was uneven.From the area and number of the patch,the basin was dominated by warm-temperate coniferous forests、warm-temperate scrub / scrun-grassland,rain-fed cropland,which covered 83.25% of the total area and constitute the landscape matrix in basion.The Shannon diversity index and contag index of the landscape were high,but the patch density is low.It showed the fragmentation was low,the connectedness was high and landscape ecological patterns was more complicated than upper.