皖14井地下水观测资料变化的原因剖析

Analysis for Changes in Groundwater Observation Data of No.14 Well in Anhui Province

按照异常识别4个"相关性"原则,对皖14井水位陡降、水温突升的异常现象进行了分析。结果表明:该井主要含水层在165 m以上;水位的陡降是含水层孔裂隙环境在水震波的触发下发生改变后,水体流速增大产生了伯努利效应;195 m和165 m处的水温几乎同时发生升温变化,说明是下部水体向上流动引起的,也是伯努利效应的反映。

In July 25th, 2012, rapid drawdown of water level appeared in No.14 well of Anhui Province, while data of water temperature measured by two instruments in different depths showed that water temperature rose simultaneously. By using four relevance principles in anomaly recognition, this paper analyzes the anomalies mentioned above and gets 3 conclusions. Firstly, the main aquifer of the well is above 165 m. Secondly, the environment of pore-fracture in aquifer changed after the trigger of water shock, then velocity of water flow increased and generated Bernoulli Effect, which finally caused rapid drawdown of water level. Thirdly, the phenomenon of water temperature in the depths of 195 m and 165 m rising almost simultaneously indicates that lower water flows upwards can make this change, and verifies the Bernoulli effect. This paper also introduces a practical method for numerical smoothing of the data observed by digital temperature instrument.