摘要
以湖南省重要城市郴州市的市辖区为研究对象,选取1989年、2000年、2009年、2018年4期Landsat遥感影像,通过最大似然法提取了土地利用类型信息,运用转移矩阵分析了各年份间土地利用变化趋势,基于阈值分割图像确定了市辖区建成区范围,分析了建成区变化趋势及其与人口、经济的关系.结果表明,1989-2018年间建设用地增长147.39 km^(2),建成区面积增长32.32 km^(2),主要来自林地和耕地转化,且耕地转化占比不断增大.受“南延东进、西扩北提,东进优先”政策影响,建成区各年份间扩张强度依次为4.86%、6.45%、5.74%,主要向南、东南方向持续快速扩张.受地貌限制,建成区总体呈近南北向线性形态,属不规则圈层式+廊道式结合的扩张模式,人口、经济增长皮尔逊相关系数为0.9756、0.9751.政策、自然地貌、人口、经济构成了该城市扩张的重要驱动因素.研究可为郴州市城市高质量发展精准施策提供参考.
Taking the municipal area of Chenzhou City,an important city in Hunan Province,as the research object,we selected four periods of Landsat remote sensing images in 1989,2000,2009,and 2018,extracted the information of land use types through the maximum likelihood method,analyzed the trend of land use changes between years by using transfer matrix,determined the scope of built-up area in the municipal area based on threshold segmentation image,and analyzed the built-up area change trend and its relationship with population and economy.The results show that between 1989 and 2018,the construction land increased by 147.39 km^(2),and the built-up area increased by 32.32 km^(2),mainly from the conversion of forest land and cropland,and the proportion of cropland conversion is increasing.Affected by the policy of"extending southward and eastward,expanding westward and northward,and prioritizing eastward expansion",the expansion intensity of the built-up area is 4.86%,6.45%and 5.74%in the order of the years,and it mainly expands rapidly in the south and southeast directions.Due to geomorphological constraints,the built-up area generally shows a nearly north-south linear pattern,which is a combination of irregular circling+corridor expansion mode,and the Pearson correlation coefficients with population and economic growth are 0.9756 and 0.9751.Policies,natural landforms,population,and economy are important driving factors for the expansion of the city.The study provides reference for precise measurement of urban development and promoting high-quality urban development for Chenzhou City.
作者
何长宇
丁俊
李玉森
朱洹志
HE Changyu;DING Jun;LI Yusen;ZHU Huanzhi(School of Civil Engineering,Xiangtan University,Xiangtan 411105,China)
出处
《湘潭大学学报（自然科学版）》
CAS
2024年第6期54-64,共11页
Journal of Xiangtan University(Natural Science Edition)
基金
湖南省自然科学基金(2023JJ30584)。
关键词
建成区
市辖区
城市扩张
LANDSAT
驱动力
郴州市
built-up area
municipal district
urban expansion
Landsat
driving force
Chenzhou City
作者简介
通信作者:丁俊(1982-),湖南靖州人,博士,讲师.E-mail:dzkingdj@163.com。
