2000-2020年延安市土地利用景观格局时空演变及驱动因子
Spatial-temporal evolution and driving factors of land use landscape pattern in Yanan City from 2000 to 2020
李凯 1张北赢1
作者信息
- 1. 江苏师范大学地理测绘与城乡规划学院,徐州 221116
- 折叠
摘要
分析延安市土地利用景观格局时空演变及驱动力因子,为区域土地利用及生态环境保护提供理论依据.基于2000-2020 年延安市三期土地利用数据,从土地利用面积变化、面积转移特征和景观指数等方面分析延安市土地利用和景观时空格局变化特征,并分析产生变化的驱动因素.研究结果表明:(1)2000-2020 年延安市土地利用以林地和草地为主,耕地、水域和未利用地面积有所减少;建设用地持续增加,变化幅度最大;建设用地的增长主要分布在河流附近及相对平坦的区域,主要流入类型为耕地、林地和草地,同时耕地、林地和草地三者之间实现互相转化.(2)各土地利用类型主要集中分布于 500-1500m海拔范围内,以及 5-25°坡度范围内.(3)草地为优势景观类型,林地、草地的破碎化程度较高,建设用地连通性增强,趋向集中分布;整体上斑块不规则程度增加,景观异质性增强,景观结构组成趋向复杂化.(4)年降水量和高程等自然要素对景观格局指数的变化具有较大的影响,同时由人类活动主导的土地利用和植被变化对景观格局指数的影响逐渐增加.
Abstract
To provide the theoretical basis for regional land use and ecological environment protection,the spatial-temporal evolution and driving factors of land use landscape pattern in Yanan City were analyzed.Based on the three-phase land use data of Yanan City from 2000 to 2020,this paper analyzed the characteristics of land use and landscape temporal and spatial pattern change in Yanan City from the aspects of land use area change,area transfer characteristics,and landscape index,and analyzed the driving factors of the change.The results showed that:(1)From 2000 to 2020,the land use in Yanan City was dominated by forest land and grassland;the area of cultivated land,water area,and unused land were decreased;construction land continued to increase and changed the most.The increase of construction land was mainly distributed near the river and relatively flat areas.The main inflow types were cultivated land,forest land,and grassland.At the same time,mutual transformation was among cultivated land,forest land,and grassland.(2)The land use types were mainly concentrated in the range of 500-1500 m altitude and 5-25° slope.(3)Grassland was the dominant landscape type;the fragmentation degree of forest land and grassland was higher;the connectivity of construction land was enhanced and tended to be concentrated.On the whole,the irregular degree of patches increased,the heterogeneity of landscape increased,and the composition of landscape structure tended to be complicated.(4)Natural factors such as annual precipitation and elevation had great influence on the change of landscape pattern index,while the influence of land use and vegetation change dominated by human activities on the landscape pattern index was gradually increasing.
关键词
景观格局/景观指数/驱动因子/地理探测器/延安市Key words
landscape pattern/landscape index/driving factor/Geodetector/Yanan City引用本文复制引用
基金项目
国家自然科学基金项目(41701025)
江苏师范大学研究生科研与实践创新计划项目(2021XKT0057)
出版年
2023
国家科技期刊平台
NSTL
万方数据