Fig. 13From: Identification of hydrogeological evolution using hydrogeology-seismology analysis of groundwater head fluctuation related to the 1999 MW = 7.5 Chi-Chi earthquakeComparison of filtered drawdown hydrographs of post-seismic groundwater head by using a SVD, b wavelet transform, and c wavelet de-noising for (-1) SC2 and (-2) GH3Back to article page