Possible Continuous Vertical Water Leakage of Deep Aquifer: Records from a Deep Well in Tianjin Province, North China

Figure 13

(a) Above: distilled O₁ (blue) and K₁ (red) spectra with a time series of 27.95 days. Below: IFFT of the distilled O₁ (blue) and K₁ (red) tides. (b) Above: distilled O₁ (blue) and K₁ (red) spectra with a time series of 15 days. Below: IFFT of the distilled O₁ (blue) and K₁ (red) tides.

(a)

(b)