摘要
针对城镇化导致水系及其水域空间被挤占、压缩甚至吞噬的现实问题,本研究采用1995、2005和2015年3期经Google Map校准后的水系与1995—2015年城镇建成区面积数据,运用空间计量模型和重心模型研究湘江流域1995—2015年水系演变与城镇化的时空特征,分析城镇建成区面积对水系变化的影响。研究结果得出:1)湘江流域水系总体呈衰减趋势,河流趋向主干化。各水系指标均产生空间集聚,与周围邻近地区存在相似性。但水系指标的空间集聚格局演变差异显著,河网密度(Dr)、河流弯曲度(Sr)、干流面积长度比(Rm)空间格局稳定,水面率(Wp)、河流发育系数(Kw)较不稳定。高值区集中在流域中下游,低值区则集中在株洲和永州。2)Dr、Kw、Sr、Wp与城镇化重心迁移方向相背离,Rm与城镇化重心迁移方向具有统一性,城镇化在水系演变过程中主要起负向影响。研究结果有助于为城市规划与水系保护提供参考。
Aiming at the practical problems of river network system and its water space being squeezed,this study explored the temporal and spatial characteristics of river network system evolution and urbanization.Based on the river network system data calibrated by Google Map in 1995,2005 and 2015 and the urban built-up area data from 1995 to 2015,spatial econometric model and center of gravity model were adopted to analyzed the impact of urban built-up area on river network system change.Results indicated that,1)the river network system of Xiang River Basin showed an overall trend of decline and simplification.All river network system indicators were spatially clustered,which was correlated with the surrounding areas.However,the evolution of spatial clustering pattern of river network system indicators was significantly different.The spatial patterns of Dr,Sr and Rm were stable,while Wp and Kw were relatively unstable.The high-value areas were concentrated in the middle and lower reaches of the basin,while the low-value areas were mainly located in Zhuzhou and Yongzhou.2)The spatial patterns of Dr,Kw,Sr and Wp showed a deviation from the direction of urbanization gravity centre migration,and Rm was unified with the direction of urbanization gravity centre migration.In the process of river network system evolution,urbanization mainly played a negative role.The result could offer references for urban planning and river network system protection.
作者
杨柳
冯畅
刘子怡
邓哲
蒋燕梅
孙锐思
YANG Liu;FENG Chang;LIU Ziyi;DENG Zhe;JIANG Yanmei;SUN Ruisi(College of Geography and Tourism,Hengyang Normal University,Hengyang 421002,Hunan,China;Collaborative Innovation Center for Digital Inheritance of Cultural Heritage in Ancient Villages and Towns,Hengyang 421002,Hunan,China;Hunan Habitat Environmental Research Base,Hengyang 421002,Hunan,China)
出处
《亚热带资源与环境学报》
2023年第3期38-44,共7页
Journal of Subtropical Resources and Environment
基金
国家自然科学基金项目(41901026、42001024)
湖南省自然科学基金项目(2022JJ40015、2021JJ40011)
湖南省教育厅科学研究项目青年项目(21B0625、21B0646)
教育部大学生创新创业训练计划项目(S202010546025)
湖南省研究生科研创新项目(CX20221271)。
关键词
水系
时空格局
空间计量模型
重心迁移
湘江流域
river network system
spatial and temporal pattern
spatial econometric model
the center of gravity move
Xiangjiang River basin
