Inferring decelerated land subsidence and groundwater storage dynamics in Tianjin–Langfang using Sentinel-1 InSAR

作     者：Xuguo Shi Tongtong Zhu Wei Tang Mi Jiang Houjun Jiang Chen Yang Wei Zhan Zutao Ming Shaocheng Zhang 

作者机构：School of Geography and Information EngineeringChina University of GeosciencesWuhanPeople’s Republic of China College of Geoscience and Surveying EngineeringChina University of Mining and TechnologyBeijingPeople’s Republic of China School of Geospatial Engineering and ScienceSun Yat-Sen UniversityGuangzhouPeople’s Republic of China School of Civil EngineeringAnhui Jianzhu UniversityHefeiPeople’s Republic of China Institute of Karst GeologyCAGS/Key Laboratory of Karst DynamicsMNR&GZARGuilinPeople’s Republic of China The First Monitoring and Application CenterChina Earthquake AdministrationTianjinPeople’s Republic of China 

出 版 物：《International Journal of Digital Earth》 (国际数字地球学报（英文）)

年 卷 期：2022年第15卷第1期

页      面：1526-1546页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：financially supported by the National Natural Science Foundation of China(Grant Nos.41702376 42001368 and 42174043) 

主　　题：North China Plain aquifer parameter South-to-North water transfer project groundwater storage subsidence 

摘      要：To meet the growing demand for socioeconomic development,a large amount of groundwater is extracted from confined aquifers *** North China Plain has experienced considerable groundwater depletion and subsidence during the past six *** this study,we use Sentinel-1A/B SAR images from 2015 to 2020 to map the ground subsidence of the Tianjin–Langfang *** subsiding zones centered at Guangyang,Wuqing–Bazhou,and Jinghai are identified with maximum subsidence rates of 98.1,121.8,and 104.7 mm/*** and long-term signals are separated from time series subsidence and hydraulic measurements using continuous wavelet transform to retrieve aquifer *** long-term subsidence,which fits well with an exponential decaying model,remarkably slows down in our study *** elastic skeletal storage coefficients range between 0.52×10−3 and 9.66×10−*** then retrieve the spatial–temporal variations of total groundwater storage,recoverable groundwater storage,and irreversible groundwater *** storage depletion rates are apparently reducing,which benefits from the operation of the South-to-North Water Transfer Project and local groundwater management practices.