三峡库区腹地草堂溪小流域土地功能格局变化

发布时间：2018-05-19 05:14

本文选题：土地功能 + 三峡库区　；参考：《长江流域资源与环境》2017年02期

【摘要】：探讨三峡库区腹地土地功能格局动态特征是促进库区土地功能优化、土地利用可持续发展的重要途径之一。以草堂溪小流域为研究区,基于1990~2015年4期遥感影像和1∶5万DEM数据,借助ArcGIS 10.2与Fragstats 4.2软件,依据土地提供主要服务的差异性将土地功能划分为3个大类5个亚类,并分析研究区土地功能格局时空演变特征。结果表明:近25 a,研究区生态功能用地占绝对优势,面积增长1 541.96 hm~2,生产功能用地面积缩减1 844.19 hm~2,生活功能用地面积扩展302.24 hm~2;生物质生产功能用地和人工/天然生态功能用地间的转移关系是研究区土地功能转移网络的关键关系,决定着研究区土地功能变化特征;土地功能变化空间集聚特征时空差异性显著,生物质生产功能用地和人工/天然生态功能用地附近为土地功能变化热点区域,1990~2015年土地功能变化热点区向研究区西部推移;生物质生产功能用地、交通功能用地和住宅功能用地优势区间为中低地形位,中高地形位是非生物生产功能用地优势区间,人工/天然生态功能用地在高地形位占优势;较低地形位上景观异质性高、形状复杂,较高地形位上景观类型单一、聚集程度高。
[Abstract]:To explore the dynamic characteristics of land function pattern in the hinterland of the three Gorges Reservoir area is one of the important ways to promote the optimization of land function and the sustainable development of land use in the reservoir area. Taking the Caotangxi small watershed as the study area, based on the remote sensing images and 1: 50 DEM data from 1990 to 2015, the land function was divided into three categories and five subgroups according to the difference of land service, with the help of ArcGIS 10.2 and Fragstats 4.2 software. And analyze the spatial and temporal evolution characteristics of land function pattern in the study area. The results showed that the ecological function land in the study area was dominant in the past 25 years. The area increased by 1 541.96 hmm2, the area of production functional land decreased by 1 844.19 hmm2, the area of living functional land expanded by 302.24 hmm2, the transfer relationship between biomass production functional land and artificial / natural ecological functional land was the key relationship of land function transfer network in the study area. The spatial agglomeration characteristics of land function change are significant. In the vicinity of biomass production function land and artificial / natural ecological function land, the hot spot area of land function change from 1990 to 2015 moved to the west of the study area, and the biomass production function land, The dominant range of land use for traffic function and residential function is middle and low topographic position, middle and high topographic position is dominant area for non-biological production function land, artificial / natural ecological function land is dominant in high terrain position, landscape heterogeneity is high in lower terrain position, The shape is complex, the landscape type is single and the aggregation degree is high.
【作者单位】：重庆师范大学地理与旅游学院;三峡库区地表过程与环境遥感重庆市重点实验室;
【基金】：重庆市科学技术研究项目(No.cstc2015jcyjB0439)~~
【分类号】：P901;P237;P208

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