长沙井数字化水位观测资料典型干扰分析

Typical Interference Analysis of Digital Water Level Observation Data in Changsha Well

从自然环境、人为因素、观测技术系统和地球物理事件等方面总结长沙井水位在日常观测中可能遇到的干扰因素,分析不同干扰因素对长沙井水位观测数据产生的影响,归纳其干扰特征。结果表明,长沙井水位受到的自然环境干扰主要有气压、降雨和雷电等;人为干扰主要包括更换仪器、井房改造、清理排水管路和调节气氡进水量等;观测系统干扰主要为排水管堵塞和供电故障;地球物理事件干扰主要为同震响应。不同干扰因素引起的干扰特征各不相同。本次研究不仅能够提高对非地震前兆异常的识别能力,同时还能够促进对地震前兆异常信息的有效提取。

All kinds of interference factors in the daily observation of Changsha well are concluded in this paper,including the natural environment,human factors,observation system,geophysical events and so on.The influences of Changsha well observation data caused by various interference factors are analyzed,and the interference characteristics are generalized.The results show thatthe natural environment interfer-ences mainly include air pressure,rainfall and lightning,the human interferences mainly include the replacement of instruments,the reconstruction of well house,the cleaning of drainage pipe and the regulation of the amount of water into the gas radon,the observation system interferences mainly include the blockage of drainage pipe and the failure of power supply,the geophysical event interference is mainly co-seismic response.The interference characteristics caused by different interference factors are different.This study can not only improve the ability to recognize non-seismic precursor anomalies,but also promote the effective extraction of seismic precursor anomalies.