马鞍山皖27井数字化水位观测资料分析与效能评估

Analysis and Efficacy Evaluation of Digital Water Level Observation Data from Ma'anshan Well No.27 in Anhui Province

马鞍山皖27井是安徽省2008年第一批数字化改造的观测井,为加强对观测资料的应用及评估观测井的效能,对该井的井水位动态特征、主要干扰因素、异常变化特征、井水样水化特征等进行分析。结果表明,皖27井水位资料连续可靠,年变规律明显,地壳应力—应变响应灵敏度较高,对周边200公里范围内的中强震有很好的对应关系,能够在中短期前兆异常监测中发挥一定的作用。

Well No.27 in Ma'anshan,Anhui Province,was among the first batch of wells to be digitalized in 2008.To enhance the application of observation data and assess the effectiveness of observation wells,an analysis is conducted on the dynamic characteristics of the well water level,main interference factors,characteristics of abnormal changes,and the hydrochemical characteristics of well water samples.The results indicate that the water level data from Well No.27 is continuous and reliable,with clear annual patterns and high sensitivity to the crustal stress-strain response.The well has a good correspondence with moderate and strong earthquakes within a 200 km radius and can play a role in the monitoring of medium and short-term precursor anomalies.