利用Sentinel-1A数据监测大西安2019～2022年大西安地表形变

冯旻譞; 齐琦; 董英; 曾磊; 张新社; 刘文辉; 李勇; 王涛; 张戈

doi:10.12401/j.nwg.2023100

利用Sentinel-1A数据监测大西安2019～2022年大西安地表形变

冯旻譞^{1, 2,},
齐琦^1, ,,
董英¹,
曾磊¹,
张新社¹,
刘文辉¹,
李勇^{3, 4},
王涛¹,
张戈¹

1.
中国地质调查局西安地质调查中心 / 自然资源部黄土地质灾害重点实验室，陕西西安　710119
2.
长安大学地质工程与测绘学院，陕西西安　710054
3.
陕西省地质环境监测总站（陕西省地质灾害中心），陕西西安　710054
4.
自然资源部陕西西安地裂缝与地面沉降野外科学观测研究站，陕西西安　710054

基金项目: 中国地质调查局项目“西安城市地质安全体检与风险评估示范”（DD20211317），“西安城市地质安全调查评价与风险管理示范”（DD20211317），“西北典型地区地质灾害调查”（DD20221739）联合资助。

详细信息

作者简介:
冯旻譞（1990−），女，博士，助理研究员，从事地质灾害调查、InSAR技术应用等研究。E−mail：fmx98@sina.com

通讯作者:
齐琦（1989−），男，硕士，工程师，从事工程地质、构造地质等研究。E−mail：xqq8901@163.com

中图分类号: P542+.3
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出版历程
- 收稿日期: 2023-02-11
- 修回日期: 2023-04-18
- 网络出版日期: 2023-05-22
- 刊出日期: 2023-06-19

Monitoring Surface Deformation in Xi’an City from 2019 to 2022 Based on Sentinel-1A Data

FENG Minxuan^{1, 2,},
QI Qi^1, ,,
DONG Ying¹,
ZENG Lei¹,
ZHANG Xinshe¹,
LIU Wenhui¹,
LI Yong^{3, 4},
WANG Tao¹,
ZHANG Ge¹

1.
Key Laboratory for Geo–hazards in Loess Area, MNR, Xi’an Center of China Geologic Survey, Xi’an 710119, Shaanxi, China
2.
College of Geological Engineering and Geomatics, Chang’an University, Xi’an 710054, Shaanxi, China
3.
Shaanxi Geological Environment Monitoring Station (Shaanxi Geological Disaster Center), Xi’an 710054, Shaanxi, China
4.
Observation and Research Station of Ground Fissure and Land Subsidence, MNR, Xi’an 710054, Shaanxi, China

摘要

摘要:
西安是中国地面沉降和地裂缝等地质灾害集中发育的地区之一。西安市的地面沉降与地下水超采密切相关。近年来，西安市持续开展的地下水人工回灌，地下水位有所恢复。笔者采用小基线集干涉测量InSAR技术对西安城区 2019 年1月至2022年8月期间的 47景升轨 Sentinel-1A 数据进行处理，获取了西安地区最新的地面形变特征。研究发现，随着地下水位回升，西安市目前地面沉降已经有效缓解，典型沉降区鱼化寨、电子城等已经出现了地面回弹现象，大范围的地面沉降几乎不可见，仅在城区东南处见零星分布的沉降区。地下水位变化是导致地表回弹的重要原因。无论是电子城区域还是鱼化寨区域，其地表抬升形变已经度过土层快速变形的弹性形变时期。总体回弹量在安全范围，对周边的地铁及建筑的影响有限。
- 西安 /
- 地面回弹 /
- 地下水 /
- 地面沉降 /
- 小基线集干涉测量InSAR技术
Abstract:
Xi’an is one of the areas in China where geological hazards such as ground subsidence and ground fissures are concentrated and developed. Ground subsidence in Xi’an is closely related to groundwater over–extraction. In recent years, groundwater levels have recovered as a result of the ongoing artificial recharge of groundwater in Xi’an. In this paper, 47 scenes of Sentinel-1A data from January 2019 to August 2022 in the urban area of Xi’an were processed using the small baseline subset InSAR technique to obtain the latest ground deformation characteristics of the Xi’an area. The main results obtained in this paper are as follows: with the groundwater level starting to rebound, ground subsidence in Xi’an has now been effectively alleviated, and ground rebound has been observed in typical subsidence areas such as Yuyuanzhai and Electronic City, etc. Extensive ground subsidence is hardly visible, and only scattered subsidence areas are seen in the southeast of the urban area. Changes in the groundwater table are an important cause of ground rebound. The surface uplift deformation in both the Electronic City area and the Yuhuazhai area has already passed the elastic deformation period of rapid soil deformation. The overall amount of rebound is within the safe range and the impact on the surrounding metro and buildings is limited.
- Xi’an /
- rebound deformation /
- groundwater /
- land subsidence /
- small baseline subsets InSAR technique

HTML全文

图 1 研究区位置及 Sentinel影像覆盖范围图

Figure 1. Research area and Sentinel-1A SAR data coverage

下载: 全尺寸图片幻灯片

图 2 SAR干涉图的时空基线分布图

Figure 2. Spatial and temporal baseline distribution of SAR interferogram

下载: 全尺寸图片幻灯片

图 3 西安2019～2022年地表形变速率图

Figure 3. Annual deformation rate map of Xi’an from 2019 to 2022

下载: 全尺寸图片幻灯片

图 4 鱼化寨地区2019～2022平均地表形变速率图

灰线区域为鱼化寨原沉降区域，根据Shi等（2020）修改

Figure 4. Annual deformation rate map of Yuhuazhai area from 2019 to 2022

下载: 全尺寸图片幻灯片

图 5 鱼化寨地区2015～2022年累计形变量图

□ 代表的累积形变量源自Shi 等（2020）；● 代表的累积形变量来自于文中计算结果

Figure 5. Cumulative deformation of Yuhuazhai area from 2015 to 2022

下载: 全尺寸图片幻灯片

图 6 电子城地区形变图

a. 2019～2022形变速率图；b. 典型点位累计形变量；c.区域累计时序形变图

Figure 6. Deformation analysis of Dianzicheng area

下载: 全尺寸图片幻灯片

图 7 鱼化寨地区城市建设发展演化的光学影像图

a. 2018年9月；b. 2018年11月；c. 2019年12月

Figure 7. Optical image of Yuhuazhai area

下载: 全尺寸图片幻灯片

图 8 电子城区域地下水水位变化曲线图

Figure 8. Groundwater levels variation of Dianzicheng area

下载: 全尺寸图片幻灯片

图 9 快速抬升阶段与监测时间段的累计形变对比图

Figure 9. Comparison of cumulative deformation between the rapid uplift stage and the whole monitoring period

下载: 全尺寸图片幻灯片

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