摘要详情
117 / 2023-05-31 16:27:15
Study on the Relationship between Groundwater Change and Land Subsidence Based on GRACE and Sentinel-1 Satellite Observations
Mine Subsidence Monitoring,StaMPS-SBAS,GRACE,Groundwater,REOF
摘要待审
Abstract: Surface subsidence has become one of the key geological hazards for prevention and control in recent years, which affects the sustainable development of economy and society.In order to comprehensively and accurately grasp the current situation and development trend of regional surface subsidence, and to study the relationship between surface subsidence and water storage changes, this paper firstly obtained the surface deformation data of central Shanxi Province from 2017 to 2021 by the Stanford Method for Persistent Scatterers-Small Baseline Subset InSAR (StaMPS-SBAS) technique using the 58-view ascending orbit Sentinel-1A satellite observation data;Then, the Gravity Recovery and Climate Experiment (GRACE) was used to obtain data on water storage changes in the corresponding regions.Finally, the spatial and temporal characteristics of the time-series cumulative subsidence were analyzed by combining the Rotated Empirical Orthogonal Function (REOF) analysis method.The results indicate that:(1) The monitoring results were verified by using GlobalNavigationSatelliteSystem (GNSS) data, among which the monitoring results using atmospheric correction were the best and could meet the accuracy requirements of surface subsidence monitoring.The monitoring results show that the maximum subsidence rate in the vertical direction in the central part of Shanxi Province from 2017 to 2021 is 54.31 mm/a, and the maximum amount of subsidence is 254.11 mm.(2) Extensive coal mining has had a twofold impact on water storage changes.On the one hand, coal mining will directly cause quality transfer; on the other hand, massive coal mining will destroy the geological structure of the coal mining area and cause massive loss of groundwater.The monitoring results are more reliable after deducting these factors from the water storage changes obtained from the GRACE inversion. The results show that the water storage in the study area exhibits seasonal variations and shows an overall decreasing trend, reflecting the natural phenomenon of low rainfall and the serious problem of groundwater deficiency in Shanxi Province.(3) The three main eigenmodes of surface subsidence were obtained by using REOF analysis, and the variance contribution of the three eigenmodes decreased sequentially and accumulated to 86.14%.Among them, the first mode has the largest variance contribution of 66.28%.Thereafter, the characteristic distribution of the first mode and the trend of groundwater change were compared and analyzed, and it was found that the main factors leading to the surface deformation were the severe loss of groundwater and the mining of coal resources.The study provides a basis and support for resource development and disaster prevention in important coal energy sites and major infrastructure projects in China.
Keywords: StaMPS-SBAS; Subsidence Monitoring; GRACE; Groundwater; Coal Mining; REOF
Keywords: StaMPS-SBAS; Subsidence Monitoring; GRACE; Groundwater; Coal Mining; REOF
重要日期
-
会议日期
10月26日
2023
至10月29日
2023
-
10月15日 2023
摘要截稿日期
-
10月15日 2023
初稿截稿日期
-
11月13日 2023
注册截止日期
主办单位
国际矿山测量协会
中国煤炭学会
中国测绘学会
中国煤炭学会
中国测绘学会
承办单位
中国矿业大学
中国煤炭科工集团有限公司
中国煤炭科工集团有限公司
