甘肃天水元龙井水位和清水李沟井流量映震能力与无震异常分析

Reflecting Earthquake Ability and Aseismic Anomalies of Water Level of Yuanlong Well and Flow Rate of Ligou Well in Tianshui City

利用"看图识字"法对天水麦积元龙井水位和清水李沟井流量多年的观测资料进行了研究,认为麦积元龙井水位年动态基本稳定,在未出现较大降雨干扰的情况下,井水位出现弓形或大幅度的升降变化,可视为短临前兆异常;通过降雨与流量资料的对比分析,认为降雨对清水李沟井流量影响较小。当流量出现时间较长的大幅度变化时,认为是短临前兆异常。

As an important precursor observation method for earthquake monitoring and prediction in southeast Gansu, the water level of the Yuanlong well in the Mairi area, and the flow rate ofthe Ligou well in Qingshui county, Tianshui city are both strong indicators of earthquake precusor anomalies. It is also important to study the aseismic anomalies of these two wells. In this study, we used the ＂flashcards＂ method to examine the water level and flow rate observation data of the two wells over many years. The results show that （1） The annual dynamic change in water level of the Yuanlong well is basically stable. （2） In the absence of heavy rainfall, if the water level shows a bow-shaped or large amplitude of change, it can be regarded as a short-impending precursor anomaly. A comparison of rainfall data and the flow rate of the Qingshui well reveals that the influence of rainfall on the flow rate of the well is small, so if tlarge and long-term change, it can be regarded as a short and impending anomaly.