兰西城市群建设用地扩张时空特征研究  

Research on the spatio-temporal characteristics of construction land expansion in Lanzhou-Xining Urban Agglomeration

作　　者：任君 刘玮 张思宇 李成英[2] 张翰宣 高亚培 REN Jun;LIU Wei;ZHANG Si-yu;LI Cheng-ying;ZHANG Han-xuan;GAO Ya-pei(Graduate school of Qinghai University,Xining 810016,China;School of Civil&Water Resources,Qinghai University,Xining 810016,China;Qinghai Provincial Meteorological Service Center,Xining 810008,China;College of resources and environment,Northwest A&F University,Yangling 712100,China)

机构地区：[1]青海大学研究生院,青海西宁810016 [2]青海大学土木水利学院,青海西宁810016 [3]青海省气象服务中心,青海西宁810008 [4]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《青海师范大学学报(自然科学版)》2024年第4期26-38,共13页Journal of Qinghai Normal University(Natural Science Edition)

基　　金：国家社会科学基金青年项目(21CGL040);青海省省级哲学社会科学青年项目(23Q060);青海省社会科学基金青年项目(20052)。

摘　　要：以黄河上游生态环境脆弱而重要的兰西城市群为研究对象,基于4期高分辨率遥感影像数据,采用扩张强度指数和标准差椭圆,“多尺度、多类型”对其建设用地扩张时空特征进行研究.结果表明:兰西城市群建设用地持续扩张,青海片区和甘肃片区及兰州市和西宁市城镇建设用地扩张具有“同向离心”的特征,而西宁市和海东市城镇建设用地扩张具有“同频共振”的特征,且县(区)城镇建设用地扩张呈“核心-边缘”模式;农村居民点用地在2010年后开始缓慢增加,呈“城市区快速衰退,近郊区低速扩张,农牧业区稳定不变或缓慢衰退”的扩张特征;其他建设用地不断增加,呈“东西两头快速扩张,北部低速扩张,南部稳定不变”的空间分异特征.The expansion of construction land is the direct evidence of human transformation of the earth’s surface.Lanzhou-Xining Urban Agglomeration was selected as the study case in this paper,which has an important and fragile ecological environment in the upper reaches of the Yellow River.Based on four periods of high-resolution remote sensing image data,the expansion intensity index and standard deviation ellipse were used to study the spatio-temporal characteristics of construction land expansion from the perspective of"multi-scale and multi type".The results show that:(1)the construction land of Lanzhou-Xining Urban Agglomeration continues to expand,and the expansion of urban construction land in Qinghai Province and Gansu Province,Lanzhou city and Xining city has the characteristics of"co-directional centrifugation",while that in Xining city and Haidong city has the characteristics of"co-frequency resonance",and the urban construction land expansion of counties(districts)presents a"core-edge"model.(2)Rural residential land began to increase slowly after 2010,showing the expansion characteristics of"rapid recession in urban areas,slow expansion in suburban areas,and stable or slow decline in agricultural and pastoral areas".(3)Other construction land is increasing,showing a spatial differentiation characteristic of"rapid expansion in the east and west,slow expansion in the north,and stable and unchanged in the south".The research results can provide references for the optimization of land spatial layout in Lanzhou-Xining Urban Agglomeration and national differential allocation of construction land indicators.

关 键 词：建设用地扩张 时空特征 遥感数据 标准差椭圆 兰西城市群 

分 类 号：P967[天文地球—自然地理学]