摘要
随着城镇化建设、“一带一路”建设和生态文明建设的逐步推进,大西安地区土地利用时空特征发生了明显变化。采用转移矩阵、标准差椭圆分析、热点分析、点密度分析等方法,研究1990—2015年大西安地区土地利用时空变化并进行热区诊断分析。结果表明:①耕地面积占比最大,但整体上呈减少趋势,建设用地面积大幅增加,林地、草地、水域面积均有所减少;②土地利用类型相互转换频繁,建设用地与耕地互为最主要转换对象,耕地、林地、草地之间存在相互转换关系;③耕地变化主要集中在研究区中部、渭河流域以及秦岭山区附近,生态用地变化主要集中在研究区中部和东南部,建设用地变化呈分散分布;④土地利用变化中心向西北偏移,以“东北—西南”为主轴发生倾斜,热点区域为研究区南部,集中情况呈现出“中部集中、四周扩散”的特征;⑤经济建设、社会发展、生态文明建设等是大西安地区土地利用变化的重要影响因素。
With the development of urbanization and the construction of“The Belt and Road”and ecological civilization,the temporal and spatial characteristics of regional land use in the Great Xi’an have been changed significantly in the past 25 years.Based on transition matrix,standard deviation ellipse analysis,hotspot analysis,point density analysis and other methods,spatial-temporal changes of land use in the Great Xi’an from 1990 to 2015 are analyzed.The results show that:①Cultivated land area accounted for the largest proportion,but overall showed a decreasing trend.The area of construction land increased significantly,and the area of forest land,grassland and water areas decreased.②The land use types in the study area were frequently changed.Construction land and cultivated land were the main objects of mutual conversion.There was a mutual conversion relationship between cultivated land,forest land and grassland.③The change of cultivated land was mainly concentrated in the middle of the study area,the Weihe River Basin and the Qinling Mountains.The change of ecological land was mainly concentrated in the middle and southeast of the study area.The change of construction land was scattered.④The center of change shifted northwest and inclined along the“northeast-southwest”axis.The hot spots were located in the south of the study area.The concentration characteristic was“centralization in the middle and diffusion around”.⑤Economic construction,social development,and ecological civilization construction are important factors influencing land use change in the Great Xi’an area.
作者
仉振宇
朱记伟
解建仓
张永进
马增辉
ZHANG Zhenyu;ZHU Jiwei;XIE Jiancang;ZHANG Yongjin;MA Zenghui(State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi’an University of Technology,Xi’an 710048,China;Research Center of Eco-hydraulics and Sustainable Development,The New Style Think Tank of Shaanxi Universities,Xi’an 710048,China;Northwest Branch of Shaanxi Land Engineering Construction Group,Yulin 719000,China)
出处
《西安理工大学学报》
CAS
北大核心
2020年第2期159-169,共11页
Journal of Xi'an University of Technology
基金
国家自然科学基金面上项目(51479160)
陕西省水利科技计划资助项目(2018SLKJ-19)。
关键词
土地利用
时空格局变化
热点分析
大西安
land use
spatial-temporal changes
hotspot analysis
the Great Xi’an
