Site characterization at Treasure Island and Delaney Park downhole arrays by heterogeneous data assimilation

This article extends a recently proposed heterogeneous data assimilation technique for site characterization to estimate compression and shear wave velocity ( V p s , respectively) damping at Treasure Island Delaney Park downhole arrays. The adopted method is based on the joint inversion of earthquake acceleration time series experimental surface dispersion includes physical constraints improve inverse problem’s well-posedness. We first use synthetic these two sites refine approach then apply refined algorithm real datasets available results show that estimated profiles are in very good agreement with measured sites. Our experiment suggest estimation from arrays can be improved by integrating water table depth information or higher modes Rayleigh data. In last part this article, we compare performance inverted other methods used incorporate spatial variability scattering effects one-dimensional (1D) ground response analysis (GRA). comparisons inversion-based ratios better integrate into 1D GRAs, especially array, which classified as poorly modeled using traditional GRA.