基于土地利用变化图谱的地形梯度效应分析——以洞庭湖区为例  

Analysis of Topographic Gradient Effect Based on Land Use Change Mapping:A Case Study in Dongting Lake Area

作　　者：金秋悦 谭洁[1] 谭雪兰[2] JIN Qiu-yue;TAN Jie;TAN Xue-lan(College of Landscape Architecture and Art Design, Hunan Agricultural University;School of Resources and Environment, Hunan Agricultural University)

机构地区：[1]湖南农业大学风景园林与艺术设计学院 [2]湖南农业大学资源环境学院

出　　处：《智能建筑与智慧城市》2022年第2期46-49,共4页Intelligent Building & Smart City

基　　金：国家自然科学基金,项目编号:41971219;国家大学生创新训练项目,项目编号:S202010537015。

摘　　要：基于洞庭湖区1996年~2016年遥感影像和DEM数据,运用土地利用变化图谱、地形位指数、分布指数等方法研究了土地利用图谱的地形梯度效应。结果表明:(1)土地利用类型以耕地、林地和水域为主,建设用地面积增长最快,水域面积持续萎缩;(2)土地变化模式图谱中稳定型图谱为主要类型,土地利用变化呈现"耕地稳定与耕草交替"特征;(3)以低和中低地形梯度为主,稳定型图谱和过渡型图谱在高地形位有分布优势,前期变化型图谱、后期变化型图谱和持续变化型图谱在各个地形位尺度上分布相对均匀。Based on remote sensing images and DEM data from 1996-2016 in Dongting Lake area,the topographic gradient effects of land use mapping were studied using land use change mapping,topographic position index and distribution index.The results showed that:(1)The main types of land use were cultivated land,forest land and water area.The area of construction land increased the fastest,and the area of water area continued to shrink.(2)The main type of land change pattern mapping was stable mapping,followed by transitional mapping,and land use change was characterized by "stable cultivated land,alternating cultivated land and grassland".(3)The study area was dominated by low and medium-low topographic gradients,with stable mapping and transitional mapping having a dominant distribution in high topographic positions,pre-change mapping,late-change mapping and continuous change mapping being relatively evenly distributed in each topographic position scale.

关 键 词：土地利用变化 动态度 地学信息图谱 地形梯度效应 洞庭湖区 

分 类 号：P237[天文地球—摄影测量与遥感] TP75[天文地球—测绘科学与技术]