Study of 3-D velocity structure characteristics in Dadu river Houziyan reservoir area at different impoundment stages
High-resolution three-dimensional VP, VS and VP/VS images in the Houziyan Reservoir Area were obtained by using Fast Marching Tomography Package (FMTOMO) with the travel time data from 6330 seismic events monitored by the Houziyan Reservoir Seismic Network. This analysis yielded the 3-D velocity str...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2024-02-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2024.1324268/full |
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| author | Zhenggang Yang Zhenggang Yang Junxing Cao Yuchuan Wu Juan Qin Huibao Huang Xingzhong Du Mingxing Yang Jianchao Wu |
| author_facet | Zhenggang Yang Zhenggang Yang Junxing Cao Yuchuan Wu Juan Qin Huibao Huang Xingzhong Du Mingxing Yang Jianchao Wu |
| author_sort | Zhenggang Yang |
| collection | DOAJ |
| description | High-resolution three-dimensional VP, VS and VP/VS images in the Houziyan Reservoir Area were obtained by using Fast Marching Tomography Package (FMTOMO) with the travel time data from 6330 seismic events monitored by the Houziyan Reservoir Seismic Network. This analysis yielded the 3-D velocity structure, including longitudinal wave velocity (VP), shear wave velocity (VS), and the ratio of longitudinal and shear wave velocity (VP/VS) at different impoundment stages. The data changes at various impoundment times, depths of sections, and directions of profiles were analyzed to obtain these results. The final findings demonstrate the following results: 1) Through tomographic analysis, it was determined that the underground velocity structure in the Houziyan reservoir area was anisotropic before impoundment. 2) The area of high wave velocity increases in stage 1, stage 3, and stage 4. The area of low wave velocity increases in stage 2, especially in depth, indicating significant changes in the underground velocity structure at different impoundment stages. 3) Compared to the changes in underground velocity structures in other reservoirs after impoundment, the Houziyan reservoir exhibited a unique pattern. 4) In general, the underground velocity structure displayed an overall increasing trend after impoundment. However, it also exhibited instances of decreasing velocity, reflecting continuous dynamic adjustments to the underground velocity structure after impoundment. These conclusions highlight the impact of impoundment in the reservoir area on the underground velocity structure and provide scientific theoretical support for seismic risk assessment following impoundment in the reservoir area. |
| first_indexed | 2024-03-07T21:26:25Z |
| format | Article |
| id | doaj.art-fc8227564e2242439e1f6a6642053585 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-03-07T21:26:25Z |
| publishDate | 2024-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-fc8227564e2242439e1f6a66420535852024-02-27T04:59:02ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632024-02-011210.3389/feart.2024.13242681324268Study of 3-D velocity structure characteristics in Dadu river Houziyan reservoir area at different impoundment stagesZhenggang Yang0Zhenggang Yang1Junxing Cao2Yuchuan Wu3Juan Qin4Huibao Huang5Xingzhong Du6Mingxing Yang7Jianchao Wu8College of Geophysics, Chengdu University of Technology, Chengdu, ChinaPower China Guiyang Survey Design and Research Institute Co., Ltd., Guiyang, ChinaCollege of Geophysics, Chengdu University of Technology, Chengdu, ChinaPower China Guiyang Survey Design and Research Institute Co., Ltd., Guiyang, ChinaChongqing Earthquake Agency, Chongqing, ChinaGuodian Dadu River Basin Hydropower Development Co., Ltd., Chengdu, ChinaPower China Guiyang Survey Design and Research Institute Co., Ltd., Guiyang, ChinaSchool of Resource and Environment Engineering, Guizhou Institute of Technology, Guiyang, ChinaHubei Key Laboratory of Earthquake Early Warning, Institute of Seismology, China Earthquake Administration, Wuhan, ChinaHigh-resolution three-dimensional VP, VS and VP/VS images in the Houziyan Reservoir Area were obtained by using Fast Marching Tomography Package (FMTOMO) with the travel time data from 6330 seismic events monitored by the Houziyan Reservoir Seismic Network. This analysis yielded the 3-D velocity structure, including longitudinal wave velocity (VP), shear wave velocity (VS), and the ratio of longitudinal and shear wave velocity (VP/VS) at different impoundment stages. The data changes at various impoundment times, depths of sections, and directions of profiles were analyzed to obtain these results. The final findings demonstrate the following results: 1) Through tomographic analysis, it was determined that the underground velocity structure in the Houziyan reservoir area was anisotropic before impoundment. 2) The area of high wave velocity increases in stage 1, stage 3, and stage 4. The area of low wave velocity increases in stage 2, especially in depth, indicating significant changes in the underground velocity structure at different impoundment stages. 3) Compared to the changes in underground velocity structures in other reservoirs after impoundment, the Houziyan reservoir exhibited a unique pattern. 4) In general, the underground velocity structure displayed an overall increasing trend after impoundment. However, it also exhibited instances of decreasing velocity, reflecting continuous dynamic adjustments to the underground velocity structure after impoundment. These conclusions highlight the impact of impoundment in the reservoir area on the underground velocity structure and provide scientific theoretical support for seismic risk assessment following impoundment in the reservoir area.https://www.frontiersin.org/articles/10.3389/feart.2024.1324268/fullreservoir impoundmentreservoir earthquakeseismic tomographyvelocity structurehouziyan reservoir area |
| spellingShingle | Zhenggang Yang Zhenggang Yang Junxing Cao Yuchuan Wu Juan Qin Huibao Huang Xingzhong Du Mingxing Yang Jianchao Wu Study of 3-D velocity structure characteristics in Dadu river Houziyan reservoir area at different impoundment stages Frontiers in Earth Science reservoir impoundment reservoir earthquake seismic tomography velocity structure houziyan reservoir area |
| title | Study of 3-D velocity structure characteristics in Dadu river Houziyan reservoir area at different impoundment stages |
| title_full | Study of 3-D velocity structure characteristics in Dadu river Houziyan reservoir area at different impoundment stages |
| title_fullStr | Study of 3-D velocity structure characteristics in Dadu river Houziyan reservoir area at different impoundment stages |
| title_full_unstemmed | Study of 3-D velocity structure characteristics in Dadu river Houziyan reservoir area at different impoundment stages |
| title_short | Study of 3-D velocity structure characteristics in Dadu river Houziyan reservoir area at different impoundment stages |
| title_sort | study of 3 d velocity structure characteristics in dadu river houziyan reservoir area at different impoundment stages |
| topic | reservoir impoundment reservoir earthquake seismic tomography velocity structure houziyan reservoir area |
| url | https://www.frontiersin.org/articles/10.3389/feart.2024.1324268/full |
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