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

doi:10.3969/j.issn.0253-4967.2011.03.011

SEISMOLOGY AND GEOLOGY ›› 2011, Vol. 33 ›› Issue (3): 615-626.DOI: 10.3969/j.issn.0253-4967.2011.03.011

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

CHE Yong-tai¹, HE An-hua², YU Jin-zi¹, LIU Cheng-long¹, LI Wan-ming³

1. Institute of Geology,China Earthquake Administration, Beijing 100029,China;
2. Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China;
3. Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China

Received:2011-04-11 Revised:2011-08-02 Online:2011-09-29 Published:2011-12-16

金沙江水网各观测井温度梯度的精细测量结果及其分析

车用太¹, 何案华², 鱼金子¹, 刘成龙¹, 李万明³

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

作者简介:车用太,男,1942年生,1969年研究生毕业于中国科学院地质研究所水文地质专业,研究员,主要致力于地震地下流体监测与地震预测研究,电话010-62009057,E-mail: che@ies.ac.cn。
基金资助:
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。

Abstract

Abstract:

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.

Key words: temperature, temperature gradient, observation well, Jinshajiang groundwater observation network

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。

关键词: 温度, 温度梯度, 观测井, 金沙江水网

CLC Number:

P315.72⁺3

CHE Yong-tai, HE An-hua, YU Jin-zi, LIU Cheng-long, LI Wan-ming. THE RESULTS OF FINE MEASUREMENT OF TEMPERATURE GRADIENT IN WELLS OF JINSHAJIANG GROUNDWATER OBSERVATION NETWORK AND ITS ANALYSIS[J]. SEISMOLOGY AND GEOLOGY, 2011, 33(3): 615-626.

车用太, 何案华, 鱼金子, 刘成龙, 李万明. 金沙江水网各观测井温度梯度的精细测量结果及其分析[J]. 地震地质, 2011, 33(3): 615-626.

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

金沙江水网各观测井温度梯度的精细测量结果及其分析

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