Variations of temperature are accompanied by exchange of heat, and thus, co-seismic response of water temperature during the activity of earthquake should obey the laws of thermodynamics. Taken the cases of the 2008 Wenchuan Ms8. 0 earthquake in China and the 2011 Fukushima 9. 0 Earthquake of Japan, and based on the coseismic response data of water temperature collected from well ZK26 in Haikou, Hainan province, we analysed the relationship between variations of water temperature and heat conduction as well as the thermodynamic mechanism by numerical simulation of thermodynamic conduction e-quation. Then through forward modeling, we obtained several simulation curves of coseismic effect of water temperature along the axis of well at different times, and the water temperature simulation curves fit the measurement curves approximately. Our research indicates that the way of coseismic response (ascending, descending or stable) has something to do with factors like the locations of sensors, distribution and locations of heat sources, the span between sensors and heat sources and so on.%热量的流动必然伴随着温度的改变,地震活动期间的井孔水温同震响应也服从热力学的基本规律.本文以汶川8.0级地震和日本9.0级地震为例,以海口ZK26井水温同震响应的观测数据为基础,运用热力学传导方程的数值模拟方法,研究了同震响应过程中井孔水温度变化与热量传导之间的关系及相关的热力学机制问题.通过正演的方法,得出沿井深方向不同时刻水温同震响应变化的数值模拟曲线,水温数值模拟曲线与实际测量数据一致.研究结果表明,井孔中水温同震响应方式(上升、下降或不变),与水温传感器的位置、热源的位置和分布、传感器与热源之间的相对空间等因素有关.
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