金沙江水网各观测井温度梯度的精细测量结果及其分析  

THE RESULTS OF FINE MEASUREMENT OF TEMPERATURE GRADIENT IN WELLS OF JINSHAJIANG GROUNDWATER OBSERVATION NETWORK AND ITS ANALYSIS

作　　者：车用太[1] 何案华[2] 鱼金子[1] 刘成龙[1] 李万明[3] 

机构地区：[1]中国地震局地质研究所,北京100029 [2]中国地震局地壳应力研究所,北京100085 [3]中国地震局工程力学研究所,哈尔滨150080

出　　处：《地震地质》2011年第3期615-626,共12页Seismology and Geology

基　　金：中国长江三峡工程开发集团金沙江开发有限责任公司项目(JSJ(06)007)资助

摘　　要：在金沙江水网的6口观测井进行了温度及其梯度的精细测量。测量结果表明:太阳辐射热的影响深度为50～125m;不同井的平均水温梯度不等,最小者仅0.11℃/hm,最大者可达2.81℃/hm,一般为1～2℃/hm;同一口井的不同深度段上温度梯度变化较大,地层岩性及其完整性,尤其是高角度的断层破碎带,对各井受太阳辐射热的影响深度与温度梯度的影响是主要的;水温微动态的特征如同震效应、潮汐效应与震前异常特征等,在相当程度上可能取决于水温传感器放置的深度段的温度梯度特征。The temperature and its gradient is measured carefully in 6 wells of Jinshajiang groundwater observation network.The result shows that the influence depth of sun-radiation heat is 50～125m.The average water temperature gradient is different in deferent wells,the minimum value is 0.11℃/hm,the maximum is 2.81℃/hm,and the general is 1～2℃/hm.The temperature gradient diversity in deferent depth sections in one well is very obvious,with values being in decimal fraction of ℃/hm,and the larger ones being 4～5℃/hm.Lithology of stratum and completeness of rockmass,particularly the high-angle fault crush zone,play a major role in affecting the influence depth of sun-radiation heat and temperature gradient of each well.The micro-behavior characteristics of water temperature in well,e.g.co-seismic effect,tide effect and anomalies before an earthquake etc,depend largely on the temperature gradient of the depth section where the temperature sensor is fixed.

关 键 词：温度 温度梯度 观测井 金沙江水网 

分 类 号：P315.723[天文地球—地震学]