海南琼海加积井水位受万泉河水位的影响及震例分析

Characteristics of Jiaji Well Water Level of Qionghai City Influenced by Wanquan River Water Level in Hainan and Its Earthquake Example Analysis

利用逐步回归法分析了琼海加积井受万泉河水影响的各因素,可知地下井水受河水的影响,其距离越近影响越大;在日均值数据背景下,相比固体潮、气压、降雨量,河水位对井水位的影响最大;河流潮汐与固体潮汐效应,以及河水位对地下井水影响的滞后时间在不同时期下是不同的。以2008年5月12日汶川8.0级地震为震例分析背景,得出井水位与万泉河水位小波细节3阶中在震前或震后均有较显著的震兆异常反应,值得跟踪类似的震兆异常。

The paper analyzes the factors of Jiaji well influenced by Wanquan river by using the stepwise regression method. The results show that： the closer the distance between the river and well, the greater the influence of underground well water impacted by the river impact; in the daily mean data background,comparing with the tide, atmospheric pressure, rainfall, the effects of river level to well water level is biggest;for river tide, solid tide effect, and the river level, the lag time effect on the underground water is different in different period. Taking Wenchuan earthquake as example analysis background, the paper gets the significant precursor anomalies in 3-oreder wavelet details of the well water level and Wanquan river water level before or after the earthquake, which is worth tracking.