Analysis on features of well water response in Hainan Province to tropical cyclones

Well water vibration phenomena caused by tropical cyclones were recorded by Hainan underground fluid observatory from 2001 to 2010. Taking strong tropical cyclone Swan on July 21, 2003, and typhoon Damrey on September 27, 2005, as examples, this paper systematically studies the features of water vibration caused by the above two tropical cyclones. The results show that water vibration variation image is more obvious through high-pass filtering, the water vibration period caused by tropical cyclones is 1mdash;10 min according to spectrum analysis, the starting time and amplitude peak time of well water vibration are consistent with the time of tropical cyclone passing Hainan Island, and are associated with the structural features, progress and movement process of tropical cyclones, as well as the response capability of well aquifer system to micro-dynamic message. Analysis shows that atmospheric pressure fluctuation and friction enabletropical cyclones to cause water level fluctuation.