摘要
明确土地利用情况及其地形梯度分布格局,并进行功能分区,是云南红河流域土地资源可持续利用和土地利用规划优化调整的基础.基于RS和GIS技术,使用地形分布指数、地形位指数方法系统分析了2000、2010年和2020年云南红河流域土地利用变化在高程、坡度和地形位梯度上的时空分异特征,并基于分析结果开展了云南红河流域土地利用功能区划分.结果表明:(1)林地(56.46%)和耕地(29.34%)是云南红河流域主要的土地利用类型,其次是草地(6.93%)和灌木地(6.17%),而湿地、水体和人造地表所占面积比例均不到1%.2000—2020年云南红河流域耕地和人造地表面积扩张明显,而林地持续减少,存在林地被侵占的现象;(2)云南红河流域土地利用类型分布呈现明显的地形梯度特征.耕地、人造地表受到高地形位开发难度的限制,优势位处于中低地形位的河谷、山腰区域,湿地、水体高度汇集在低地形位,草地、灌木地在中低地形位较为集中,林地则广泛分布于中高地形位;(3)基于土地利用地形分异规律,将云南红河流域划分为4个土地利用功能区,即河谷集约发展区、陡坡综合治理区、高山潜在开发区和山顶生态调控区.
The identification of land use and its topographic gradient patterns and functional zoning are the bases for the sustainable use of land resources and the optimization of land use planning in the Red River Basin.Based on RS and GIS technology,the spatio-temporal variability of land use change in elevations,slopes and topographic position gradients in the Red River Basin of Yunnan Province in 2000,2010 and 2020 was systematically analyzed,using the topographic distribution index and topographic position index methods.And based on the analysis results,the functional zoning of the Red River Basin was carried out.The results show that:①Forest land(56.46%)and cultivated land(29.34%)were the main land use types,followed by grassland(6.93%)and shrub land(6.17%)in the Red River Basin;each of the proportions of wetlands,water bodies and artificial land surface was less than 1%.From 2000 to 2020,the cultivated land and artificial land surface in the Red River Basin expanded significantly,while the woodland decreased continuously,showing a phenomenon of woodland being invaded.②The distributions of land use types in the Red River Basin of Yunnan Province show obvious topographic gradients:the cultivated land and artificial land surface are limited by the difficulty of high topographic development,so their dominant positions are in the middle and low topographic river valley and mountainside areas;the wetland and water bodies are concentrated in the low topography;the grassland and shrub land are concentrated in the middle-low topography;and the woodland is widely distributed in the middle-high topography.③Based on the regularities of the topographic differentiation of land use,the Red River Basin of Yunnan Province is divided into four land use functional zones:Valley intensive development zone,steep slope comprehensive management zone,high mountain potential development zone and mountain top ecological regulation zone.
作者
杨李玲
和阳一丹
唐红
陈昌明
和克俭
YANG Liling;HE-YANG Yidan;TANG Hong;CHEN Changming;HE Kejian(Institute of International Rivers and Eco-Security,Yunnan University,Kunming 650500,Yunnan,China;School of Earth Sciences,Yunnan University,Kunming 650500,Yunnan,China)
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2024年第2期276-287,共12页
Journal of Yunnan University(Natural Sciences Edition)
基金
国家自然科学基金(32060304)。
关键词
云南红河流域
土地利用
地形梯度
分布指数
地形位
功能分区
the Red River Basin of Yunnan Province
land use
topographic gradient
distribution index
topographic position
functional zoning
作者简介
杨李玲(1999-),女,云南人,硕士生,主要研究土地利用与管理.E-mail:yll@mail.ynu.edu.cn;通信作者:和克俭(1980-),男,云南人,讲师,主要研究景观生态、GIS在地理学中的应用.E-mail:hekejian@ynu.edu.cn.
