基于多源数据研究三峡地区环境负荷引起的地壳垂直形变  

Research on Vertical Crustal Deformation Caused by Environmental Load in the Three Gorges Region Based on Multi-Source Data

作　　者：段虎荣[1,2] 张成浩 梁文康 王金驰 刘鹏 DUAN Hurong;ZHANG Chenghao;LIANG Wenkang;WANG Jinchi;LIU Peng(College of Geomatics,Xi’an University of Science and Technology,58 Mid-Yanta Road,Xi’an 710054,China;State Key Laboratory of Geodesy and Earth’s Dynamics,Innovation Academy for Precision Measurement Science and Technology,CAS,340 Xudong Street,Wuhan 430077,China)

机构地区：[1]西安科技大学测绘科学与技术学院,西安市710054 [2]中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室,武汉市430077

出　　处：《大地测量与地球动力学》2024年第6期624-629,共6页Journal of Geodesy and Geodynamics

基　　金：中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室开放研究基金(SKLGED2022-5-2);陕西省自然科学基础研究计划(2021JQ-562)。

摘　　要：构建三峡地区大气和陆地水质量变化模型,利用GNSS、GRACE-FO和环境质量变化模型计算三峡地区2019~2022年环境负荷引起的地壳垂直形变,探讨基于GRACE-FO数据的球谐函数法和结合质量变化模型的格林函数法在计算环境负荷垂直形变上的差异。研究发现,2种方法计算的陆地水负荷垂直形变在时空分布上具有一定的一致性,但是后者的精度和空间分辨率更高;基于质量变化模型计算的CQWZ站和HBZG站的环境总负荷垂直形变与GNSS实测结果相关系数达到0.88和0.83;2019~2022年三峡库区和洞庭湖流域的地壳垂直形变速率分别为0.5~0.7 mm/a和0.6~1.5 mm/a,原因是2022年该区域水位降低导致地壳回弹上升;三峡库区附近地壳夏季上升、冬季下沉,垂直形变幅度约为-5~18 mm,主要受水库蓄水和大气负荷驱动的影响。We constructed models for changes in atmospheric and terrestrial water mass in the Three Gorges region.Then,using GNSS,GRACE-FO,and environmental mass change models,we calculate and analyze the vertical crustal deformation caused by environmental load from 2019 to 2022 in the region.At last,we discuss the differences in calculating environmental load vertical deformation using the spherical harmonic method based on GRACE-FO data and Green’s function method combined with the mass change model.The research reveals the vertical deformation of terrestrial water load of the two methods exhibits a certain consistency in spatiotemporal distribution,but the mass change model shows higher accuracy and spatial resolution.We calculate the environmental total load vertical deformation at CQWZ and HBZG stations,based on the quality change model.The correlation coefficients between deformation and GNSS measured results reached 0.88 and 0.83,respectively.The vertical deformation rates of the crust in the Three Gorges reservoir area and Dongting lake basin from 2019 to 2022 are 0.5 to 0.7 mm/a and 0.6 to 1.5 mm/a,respectively.We attribute this to the decrease in water level in the region in 2022,leading to crustal rebound.The crust near the Three Gorges reservoir exhibits a pattern of rising in summer and sinking in winter,with vertical deformation amplitudes ranging from-5 to 18 mm,primarily driven by reservoir water storage and atmospheric load.

关 键 词：三峡地区 负荷垂直形变 GNSS GRACE-FO 质量变化模型 

分 类 号：P223[天文地球—大地测量学与测量工程] P313[天文地球—测绘科学与技术]