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Title:: Experimental Analysis of Water Temperature Variation in Qujing Seismic Observation Well

作者:: 张立¹; 苏有锦¹; 张磊²; 田雷³; 高文斐¹; 应骁睿¹; 王云¹; (1.云南省地震局,云南昆明 650224; 2.中国地震局地壳应力研究所,北京 100085; 3.中国地震台网中心,北京 100045)

Author(s):: ZHANG Li¹; SU Youjin¹; ZHANG Lei²; TIAN Lei³; GAO Wenfei¹; YING Xiaorui¹; WANG Yun¹; (1. Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)(2. Institute of Crustal Dynamics,China Earthquake Administration,Beijing 100085,China(3.China Earthquake Networks Center,Beijing 100045,China)

Keywords:: water temperature; continuous heating; Solid tide; Qujiang seismic observation well

摘要:: 通过理论分析和现场观测实验,对云南曲江地震观测井水温观测出现的持续升温变化进行了成因分析,证明了观测井泄流口的“堵塞”或“疏通”可产生水温持续的变化。实验还发现水温可以记录到固体潮效应,对地壳动力作用有响应,地震观测井水温变化可用作地壳应力-应变关系的分析。最后建议重新放置水温探头到更适宜的位置,以提高该井水温观测的映震能力。

Abstract:: Based on theoretical analysis and field observation experiments,the causes of continuous temperature rise of Qujiang well in Yunnan are analyzed,it is proved that the main reason for the change is the blockage and dredging of the outlet of the observation well. For the abnormal change of water temperature,based on theoretical analysis and experimental results,we have made a judgement. Secondly,it is found that the water temperature can record the change of the earth tide,the water temperature can also respond to the dynamic action of the earth’s crust,the variation of water temperature in the seismic well can be used as an analysis of the crustal stress-strain relationship. It is suggested that the water temperature probe of the well be repositioned to a more suitable location to enhance the earthquake reflecting ability of the well.