Determination of Appropriate Geodetic Observational regions to Monitor the Mechanical behavior of NTF by Sensitivity Analysis of Okada Model Using HDMR Method

Authors

Civil Engineering Faculty, University of Tabriz, Tabriz, Iran

Abstract

The faulting phenomenon involves different variables. Some of these variables are determined more accurately than others using non-modeling approaches. The main subject of this paper is to investigate the influence of both individual geometrical and physical input parameters involved in the Earth surface displacement models. For different physical and geometrical parameters, it is recommended to use sensitivity analysis on parameters that are determined from a field study with less accuracy. Both slip rate and locking depth of the fault are major parameters, in this aspect.
In this paper, the role of all faulting parameters on surface displacement data has been investigated. To do this analysis, the elastic half-space model of Okada (1985) was used. As a case study, the surface displacements model was applied to the North Tabriz Fault. The medium is composed of an elastic half-space. Sensitivity analysis was conducted on all geometrical and physical parameters. Finally, the regions of the most appropriate surface displacements were determined to obtain the most accurate values for the studied parameters. According to the obtained results, the model parameters, i.e., locking depth and slip rate, could be determined more effectively in the regions near and away from the fault trace, respectively.

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Main Subjects


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