1990-2022年甘南州土地利用变化分析  

The Analysis of Land Use Change in Ganan Prefecture from 1990—2022

作　　者：吴翠霞 颉继珍 包琼 雷元奇 WU Cuixia;XIE jizhen;Bao Qiong;Lei Yuanqi(Land Development and Rehabilitation Center of Gansu Province,Lanzhou Gansu 730000,China)

机构地区：[1]甘肃省土地开发整理中心,甘肃兰州730000

出　　处：《甘肃林业科技》2024年第1期19-25,共7页Journal of Gansu Forestry Science and Technology

基　　金：甘肃省自然资源厅科技创新型项目(202242)。

摘　　要：土地利用变化分析可为国土空间的规划、管理、保护和利用提供理论依据。本研究基于1990、2000、2010、2022年甘南州土地利用数据,通过土地利用动态度、土地利用程度指数和土地利用转移矩阵等方法,分析了甘南州的土地利用结构、土地利用变化情况及土地利用类型转移情况。结果表明:1)甘南州的土地利用类型以草地为主,林地次之,两种土地利用类型占甘南州总面积的94.84%;2)1990-2022年甘南州林地、水域、雪/冰、荒地、不透水面总体呈增加趋势,分别增加了103226.67hm^(2)、3555.72hm^(2)、254.61hm^(2)、2646.18hm^(2)和353.97hm^(2);农田、灌丛、草地和湿地总体呈减少趋势,分别减少22309.47hm^(2)、34404.66hm^(2)和46829.34hm^(2);3)1990-2022年甘南州土地利用综合动态度为0.60%,且在1990-2000年土地利用综合动态度最大,为0.32%;4)1990-2022年甘南州土地利用程度指数分别为202.9812、203.0783、202.9245和202.3178,其土地利用水平呈“增加-减少-减少”的趋势;5)1990-2022年,林地转入面积最大,面积为124098.30hm^(2);草地转出最多,面积为139700.61hm;林地净转入最多,面积为103226.67hm^(2);草地净转出面积最大,为4682.34hm^(2)。Analyzing land use changes can provide theoretical basis for the planning,management,protection,and utilization of national land space.Based on the land use of data from 1990,2000,2010,and 2022,the article clarifies the land use structure,the land use changes and the transfer of land use types in Gannan Prefecture by calculating the dynamic degree of land use,land use degree index,and land use transfer matrix.The results show that the land use types in Gannan are mainly grassland,followed by forest land,accounting for 94.84%of the total area of Gannan;From 1990 to 2022,the forest land,water area,snow/ice,wasteland,and impermeable water surface showed an overall increasing trend,with an increase of 103226.67 m^(2),3555.72 m^(2),254.61 m^(2),2646.18 m^(2),and 353.97 m^(2);The overall trend of farmland,shrubs,grasslands,and wetlands is decreasing,with a decrease of 22309.47 m^(2),34404.66 m^(2),and 46829.34 m^(2).The comprehensive dynamic degree of land use in Gannan Prefecture from 1990 to 2022 was 0.60%,and the maximum comprehensive dynamic degree of land use was 0.32%from 1990 to 2000.The degree of land use in Gannan Prefecture from 1990 to 2022 was 202.9812,203.0783,202.9245,and 202.3178,respectively,with a trend of“increase-decrease-decrease”in land use level.From 1990 to 2022,the largest area of forest land was transferred,with an area of 124098.30 m^(2);The grassland has the highest turnover,with an area of 139700.61 m^(2);The net transfer in of forest land is the highest,with an area of 103226.67 m^(2),and the net transfer out of grassland is the highest,with an area of 4682.34 m^(2).

关 键 词：土地利用 甘南州 转移矩阵 土地利用程度 动态度 

分 类 号：S157[农业科学—土壤学] F301.2[农业科学—农业基础科学]