以钟祥马岭井历年水温观测资料为研究对象，发现2套SZW-1A型数字水温仪记录的数据曲线自2016年7月以来均具有“V”型异常特征，从观测系统、地震、降雨等因素进行分析，排查干扰因素，并分析水温变化的可能机理，认为现该异常应为降雨干扰所致。干扰机理如下：降雨量累积值达40 mm以上，降雨迅速补充地下水，浅层冷水经井段223—246 m处存在的岩石裂隙、断层、溶洞等渗入井孔，造成静水位迅速上升，井水温度随之下降，上下层冷—热水之间的热传导使得位于井孔深部的水温下降；降雨结束，地表水渗入量减少，水温逐渐恢复正常。
In this paper, we mainly study the historical water temperature observation data of Maling well in Zhongxiang. It is found that the data curves recorded by two SZW-1A digital water temperature meters have "V" type abnormal characteristics since July 2016. So we analyse the possible mechanism of water temperature changes and screen interference factors, which include the observation system, earthquake, rainfall and other factors. It is believed that the "V" type anomaly should be caused by rainfall disturbance. The interference mechanism is as follows:When the rainfall accumulation is more than 40 mm, the rainfall replenishes the groundwater rapidly, the shallow cold water penetrates into the well through rock fissures, faults, karst caves at 223-246 m of the well. As a result, the static water level rise rapidly and water temperature drops. The heat transfer between the upper and lower cold-hot water causes the temperature of deep water to drop. After the rainfall, the infiltration of surface water decrease and the water temperature gradually return to normal.
2019,40(2): 123-130 收稿日期：2018-08-29
DOI：10.3969/j.issn.1003-3246.2019.02.017
基金项目：湖北省地震局基础科研基金项目（项目编号：IS201866292-34）
作者简介：刘迁(1989-),男,湖北随州人,硕士,助理工程师,主要从事地震监测、分析预报工作。E-mail:qliu2013@163.com
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