摘要
研究基于2018—2025年的Sentinel-1A数据,利用SBAS-InSAR技术获取北京平原In-SAR形变场数据,并结合水文地质数据,系统解析了北京平原现今地表形变与地下水系统的构造控制规律及人工调水工程之间的响应特征。研究结果表明:①区域形变格局受NE向黄庄-高丽营断裂、顺义-良乡断裂及NW向南口-孙河等断裂联合控制,形成构造约束的差异形变单元。北部呈现明显回弹特征,其中顺义区的后沙峪凹陷和平谷区的平谷凹陷最为典型,形变单元最大抬升量分别为127 mm、85 mm。东部朝阳区、通州区表现出持续沉降的态势,最大累计沉降量达到438 mm,对应大兴隆起单元边界内。②南水北调工程引发的地下水补给空间分布也呈现明显的构造分带特征,南口-孙河断裂北侧的昌平区、顺义区、平谷区各含水层平均升幅为8.39~13.13 m,显著高于大兴隆起单元内朝阳区、通州区的0.75~2.37 m。此外结合重力反演数据,推测基底构造通过调控地下水运移影响形变分异,凹陷区(如后沙峪凹陷)因基岩地势低,对地下水具有汇聚作用,使得土基回弹量显著高于隆起区(如朝阳、通州沉降区)。研究成果可为位于承压冲积盆地的城市人工补水在合理布设回补井群、优化地下水回补方案提供指导,以均衡地表形变差异,保障区域地质环境安全。
Due to long-term overexploitation of groundwater and rapid urbanization,the Beijing area is experiencing severe land subsidence.Since the implementation of plain water replenishment and conservation projects such as the South to North Water Diversion Project,the problem of settlement has gradually been alleviated.At the same time,other problems such as ground rebound have emerged,making the uneven distribution of local spatial and temporal differences in ground subsidence increasingly significant.This study is based on Sentinel-1A data from 2018 to 2025,using SBAS InSAR technology to obtain InSAR deformation field data for the Beijing Plain.Combined with hydrogeological data,the study systematically analyzes the structural control laws of the current surface deformation and groundwater system in the Beijing Plain,as well as the response characteristics between artificial water diversion projects.The results indicate that:1)The regional deformation pattern is jointly controlled by NE trending Huangzhuang Gaoliying Fault,Shunyi Liangxiang Fault,and NW trending Nankou Sunhe Fault,forming structurally constrained differential deformation units.The northern region exhibits obvious rebound characteristics,with the Houshayu in Shunyi District and the Pinggu Depression in Pinggu District being the most typical,with maximum uplift amounts of 127mm and 85mm for deformation units,respectively.The eastern Chaoyang Tongzhou district shows a continuous subsidence trend,with a maximum cumulative subsidence of 438mm,corresponding to the boundary of the Daxing uplift unit.The spatial distribution of the two is highly consistent with the boundary of the Daxing uplift tectonic unit.2)The groundwater recharge caused by the South to North Water Diversion Project also exhibits structural zoning characteristics.The average rise of each aquifer in the Changping Shunyi Pinggu area on the north side of the Nankou Sunhe fault is 8.39-13.13m,significantly higher than the 0.75-2.37 m in the Chaoyang Tongzhou area of the Daxing uplift unit.In addition,based on gravity inversion data,it is speculated that the basement structure affects deformation differentiation by regulating groundwater transport.In the depression area(such as the Houshayu depression),due to the low bedrock terrain,it has a convergence effect on groundwater,resulting in a significantly higher rebound of soil foundation than in the uplift area(such as the Chaoyang Tongzhou subsidence area).The research results can provide guidance for the rational deployment of replenishment well groups and optimization of groundwater replenishment schemes for urban artificial water replenishment located in pressure bearing alluvial basins,in order to balance surface deformation differences and ensure regional geological environment safety.
作者
崔雪
张丽丽
王晨亮
刘广
吴涛涛
夏晓运
Cui Xue;Zhang Lili;Wang Chenliang;Liu Guang;Wu Taotao;Xia Xiaoyun(Beijing Zhixin Remote Sensing Geographic Information Technology Co.,Ltd.,Beijing 100192,China;Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;School of Data Science and Artificial Intelligence,Wenzhou University of Technology,Wenzhou 325000,Zhejiang,China;SuperMap Software Co.,Ltd.,Beijing 100192,China)
出处
《地理科学》
北大核心
2025年第8期1733-1744,共12页
Geographical Science
基金
国家重点研发计划(2023YFB3907700)
河北省自然科学基金(D2022103002)资助。
关键词
地表形变
南水北调
北京平原
INSAR
区域地质构造
surface deformation
“South-to-North Water Diversion”
Beijing Plain
InSAR
regional tectonics
