[1]LI Layue,YANG Guohua,ZHENG Zhijiang,et al.Dynamic Adjustment of Re-measurement Leveling Network and Its Application in Vertical Crustal Deformation in Sichuan-Yunnan Region[J].Journal of Seismological Research,2020,43(01):87-94.
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Dynamic Adjustment of Re-measurement Leveling Network and Its Application in Vertical Crustal Deformation in Sichuan-Yunnan Region
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
43
Number of periods:
2020 01
Page number:
87-94
Column:
Public date:
2020-01-30
- Title:
- Dynamic Adjustment of Re-measurement Leveling Network and Its Application in Vertical Crustal Deformation in Sichuan-Yunnan Region
- Keywords:
- precise level measurement; Sichuan-Yunnan region; dynamic adjustment; crustal deformation; fault movement
- CLC:
- P315.725
- DOI:
- -
- Abstract:
- The starting point problem of leveling has always been a key issue in leveling network adjustments.Based on dynamic classical adjustment,Quasi-stable adjustment,pseudo-inverse adjustment and GPS rate-constrained adjustment,this paper takes the measured data of 1995—2016 in Sichuan and Yunnan as an example,and carries out the adjustment calculation by the above adjustment methods,then explores the advantages and disadvantages of these kinds of adjustment methods in the leveling network adjustment.On this basis,we analyze the vertical crustal deformation characteristics of the Sichuan-Yunnan region from 1995 to 2016.The results show that the GPS rate constraint adjustment is better than the dynamic classical adjustment,quasi-stable adjustment and pseudo-inverse adjustment in case of conditions.It is mainly reflected that the GPS rate is known,rate error after adjustment is significantly reduced,and it can effectively restrain the propagation and accumulation of error; while the Quasi-stable adjustment and pseudo-inverse adjustment are better than dynamic classical adjustment,but there are also the problem of the benchmark assumption.During the period of 1995-2016,the Sichuan-Yunnan region was in a period of differential uplift.Only a few parts of the Sichuan Basin,Northwest Yunnan and SouthernYunnan were subsiding.The results of the cross-fault profile show that several main faults in the Sichuan-Yunnan region are dominated by inherited movements.
- References:
- -
- Similar References:
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Last Update:
2020-01-30