利用GNSS垂向位移研究云南地区水文干旱特征  

Research on the Hydrological Drought Characteristics in Yunnan Region Using GNSS Vertical Displacement

作　　者：朱伟刚[1] 马东 郑宇 杨兴海 ZHU Weigang;MA Dong;ZHENG Yu;YANG Xinghai(School of Prospecting and Surveying Engineering,Changchun Institute of Technology,3066 Tongzhi Street,Changchun 130021,China;Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,999 Xi’an Road,Chengdu 611756,China)

机构地区：[1]长春工程学院勘查与测绘工程学院,长春市130021 [2]西南交通大学地球科学与环境工程学院,成都市611756

出　　处：《大地测量与地球动力学》2023年第3期295-302,共8页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41871236)。

摘　　要：从中国大陆构造环境监测网络获取云南地区26个GNSS站2011~2019年垂向位移数据,计算基于GNSS垂向位移的干旱强度指数(GNSS-DSI),分析云南地区水文干旱事件。结果表明,GNSS-DSI与基于GRACE重力卫星观测数据计算的干旱强度指数(GRACE-DSI)具有较好的相关性,2种DSI数据在81%的站点具有中强相关性(0.45~0.78);GNSS-DSI可以探测并定量表征云南地区2011~2019年发生的7次中度到特大干旱事件。Using data from the China continental tectonic environment monitoring network, we obtain the vertical displacement data of 26 GNSS stations in Yunnan province from 2011 to 2019, and calculate the drought severity index based on GNSS vertical displacement(GNSS-DSI) to analyze hydrological drought events in Yunnan region. The results show that there is good correlation between GNSS-DSI and the drought severity index based on GRACE observations(GRACE-DSI), and 81% of the stations have a moderate-strong correlation between the two DSI data(0.45-0.78). GNSS-DSI can detect 7 moderate to extreme drought events in Yunnan from 2010 to 2019, and provide quantitative characterization of these hydrological drought events.

关 键 词：GNSS垂向位移 GRACE 水文干旱 干旱指数 

分 类 号：P228[天文地球—大地测量学与测量工程] P312[天文地球—测绘科学与技术]