摘要
为揭示黄河流域长时间序列生态用地时空格局及其演变异质性,服务黄河流域生态保护和高质量发展。基于1980年、1990年、2000年、2010年、2020年五期中国科学院土地利用遥感数据集,采用土地利用追踪技术、重心迁移轨迹模型与标准差椭圆等方法,开展黄河流域生态用地时空格局及演变特征研究。结果发现:①1980—2020年黄河流域生态用地主要分布于黄河流域上游和中游地区,占总面积的69.770%—70.411%,数量结构呈倒“N”型规律,其中,草地和未利用地呈减少趋势,林地和水域呈增加趋势。生态用地转移以草地与林地、未利用地和耕地互转为主,转出区域主要发生在上游。②各地类动态度变化具有明显的时序和空间差异特征,林地空间动态度呈现迂回的迁移特征,草地动态度呈现空间“集聚—分散—集聚”的特征,水域变化分布均匀且较高动态度区域逐渐南移,未利用地动态度在中游地区变化差异较大。③生态用地重心位于吴忠市,迁移方向西偏北,迁移轨迹呈三角形,共迁移40.643km。其各地类迁移方向均呈现相反方向往复迁移特征,迁移幅度在不同时段差异明显。生态用地空间格局趋向不稳定,经历了先收缩后扩张、再次收缩后又扩张的波动性增长过程。
To reveal the spatiotemporal pattern and evolution heterogeneity of ecological land over a long period and serve the eco-logical protection and high-quality development of the Yellow River Basin,this study conducted the related investigations using meth-odology of land use tracking technology,center of gravity migration trajectory,and standard deviation ellipse,based on the land use data in 1980,1990,2000,2010 and 2020.The results showed that:①Ecological land in Yellow River Basin was mainly distributed in the up-per and middle regions,accounting for 69.770%-70.411%of the total land covers,and land quantity structure displayed an“N”tendency.Wherein,grassland and unused land showed a decreasing tendency,but forest and water areas displayed an increasing tenden-cy.The transformation of ecological land was mainly characterized by the mutual transformations among grassland,forest land,unused land,and cultivated land in the upper region.②Obviously temporal and spatial differences in the changes towards different lands were observed,along with that spatial dynamic degree of forest land displayed a circuitous migration feature,while grassland showed a spatial feature of“agglomeration-dispersion-agglomeration”.Meanwhile,water area changed evenly with high dynamic attitude moving southward and unused land varied greatly in the middle reaches of the study area.③Migration trajectory of ecological land was triangu-lar,with a distance of 40.643 km and a direction of northwest,but the center of gravity still located within Wuzhong City.Elliptical vari-ation of standard deviation reflected an unstable pattern,with undergoing a fluctuating growth process of first contracting,then expan-ding,and again.
作者
宋钰
张全景
翟腾腾
潘涛
SONG Yu;ZHANG Quanjing;ZHAI Tengteng;PAN Tao(School of Geography and Tourism,Qufu Normal University,Rizhao 276826,China;Land Research Center,Qufu Normal University,Rizhao 276826,China;Key Laboratory of Land Surface Pattern and Simulation,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China)
出处
《资源开发与市场》
CAS
2024年第8期1128-1139,共12页
Resource Development & Market
基金
山东省社会科学基金项目(编号:23CGLJ18)
山东省自然科学基金项目(编号:ZR2021QD134)。
关键词
生态用地
时空格局
遥感
弦图
黄河流域
ecological land
spatial-temporal pattern
remote sensing
chord diagram
Yellow River Basin
作者简介
第一作者:宋钰(2000-),女,山东省蒙阴人,硕士研究生,研究方向为土地利用管理;通讯作者:张全景(1966-),男,山东省东明人,博士,教授,博士生导师,主要从事土地利用规划与管理研究。
