仙游井水位在2017年7月打井干扰前后频带响应的特性变化  

Frequency band response characteristics of Xianyou well water level before and after drilling disturbance in July 2017

作　　者：樊俊屹[1] 刘春国[1] 陶志刚 FAN Junyi;LIU Chunguo;TAO Zhigang(China Earthquake Networks Center, Beijing 100045, China)

机构地区：[1]中国地震台网中心,北京100045

出　　处：《地震工程学报》2021年第5期1123-1128,1141,共7页China Earthquake Engineering Journal

基　　金：中国地震局地震科技星火计划攻关项目(XH20002)。

摘　　要：利用小波变换、相关分析、调和分析方法,分析仙游井水位在2017年7月打井抽水干扰前后各频带的变化特征。结果显示:打井抽水干扰严重时,水位的全频率影响显著;趋于稳定后中频带基本恢复,但低频带仍然存在多个强信号,M_(2)潮汐应变响应能力略有下降,表明仙游井水位中频带在受干扰后是应力变化的有效监测波段。文章研究方法和结果可为水位资料干扰分析与异常提取提供参考。In this paper,the methods of wavelet transform,correlation analysis,and harmonic analysis were used to analyze the variation characteristics of Xianyou well water level in each frequency band before and after being disturbed by well drilling and pumping in July 2017.The results showed that the serious well drilling and pumping disturbance has a significant influence on the full frequency of water level.After the interference tends to be stable,the intermediate frequency band basically recovers,but there are still many strong signals in the low frequency band,and the response capacity of M_(2) tidal strain is slightly decreased,indicating that the intermediate frequency band of Xianyou well water level is an effective monitoring band for stress change after being disturbed.The research methods and results of this paper can provide reference for interference analysis and anomaly extraction of water level data.

关 键 词：抽水干扰 小波变换 潮汐参数 干扰后效 

分 类 号：P315.7[天文地球—地震学]