On the hydro-spectrum of deep wells and the response ability of well-aquifer system

onclusions 1) A set of period components corresponding well to those of Earth tides and barometric pressure can be separated from the hydro-spectra of deep well. The well-aquifer system responds to these components in some degree, which shows that groundwater regime is influenced by Earth tides and barometric pressure. However, in different frequency bands a well-aquifer system possesses different transfer ability for various inputs. 2) The transfer function quantitatively describes the response ability of well-aquifer system to Earth tides and barometric pressure. It is a characteristic parameter that the system itself possesses. According to the transfer function value of well-aquifer system to a certain input factor, we can objectively understand the influence of the input on the groundwater regime in a deep well. This is of important significance for revealing the formation of groundwater regime in a deep well and for evaluating the seismic supervising well. The work was supported by National Natural Science Foundation of China (No. 49372149).