基于GIS的京杭大运河扬州段沿岸土地利用变化分析  

Analysis on Land Utilization Change along Yangzhou Section of Beijing-HangzhouGrand Canal Based on GIS

作　　者：沈佩姗 张开源 陶前辉 SHEN Peishan;ZHANG Kaiyuan;TAO Qianhui(Yangzhou Environmental Monitoring Center of Jiangsu Province,Yangzhou 225012,Jiangsu,China)

机构地区：[1]江苏省扬州环境监测中心,江苏扬州225012

出　　处：《黄河水利职业技术学院学报》2023年第3期23-28,共6页Journal of Yellow River Conservancy Technical Institute

摘　　要：以2002年SPOT5影像和2022年的GF1影像为基准,利用随机森林方法对京杭大运河扬州段沿岸1 km范围进行土地利用分类,基于土地利用转换矩阵、土地利用动态度模型和重心迁移模型进行分类后比较。结果表明:20 a间,研究区耕地、林地、水域面积减少,草地、建设用地、未利用地面积增加。耕地为转出面积最多的土地类型,主要转出为建设用地。研究区的综合土地利用动态度为0.63%,整体土地利用类型数量变化相对平稳,未利用地和建设用地的单一土地利用动态度分别为4.61%和4.10%,数量变化相对剧烈。耕地和林地重心向北迁移,建设用地和水域重心向南迁移,耕地重心迁移距离最大(6.38 km)。Based on SPOT5 images in 2002 and GF1 images in 2022,selecting a 1km wide east-west scope of Yangzhou section of Beijing-Hangzhou Grand Canal,the random forest method was used to classify the land utilization.Based on the land utilization conversion matrix,land utilization dynamic model and center of gravity transfer model,the images were compared with before after classifying.The results showed that the cultivated land,forest land and water area in research area decreased during 20 years,while the area of grassland,construction land and unutilized land increased.Cultivated land is the land type with the largest transfer area of 51.26 km2,and the main transfer area is construction land.The dynamic attitude of comprehensive land utilization was 0.63%in research area,and the change of the total land utilization type and quantity was relatively stable.The dynamic attitude of single land utilization of unutilized land and construction land was 4.61%and 4.10%,respectively,and the change of quantity was relatively drastic.The cultivated land and forest land migrated to the north,while the construction land and water area migrated to the south,and the largest distance of cultivated land migration is 6.38 km.

关 键 词：京杭大运河扬州段 土地利用变化 土地利用分类 随机森林方法 转换矩阵 土地利用动态度模型 重心迁移模型 SPOT5影像 GF1影像 

分 类 号：TV212.4[水利工程—水文学及水资源]