三峡井网地下流体动态在水库蓄水前后的变化  

SUBSURFACE FLUID BEHAVIORS AND ITS CHANGES IN THREE GORGES WELL NETWORK BEFORE AND AFTER RESERVOIR IMPOUNDING

作　　者：车用太[1] 刘五洲[1] 颜萍[2] 刘喜兰[3] 刘成龙[1] 

机构地区：[1]中国地震局地质研究所,北京100029 [2]中国地震局地震研究所,武汉430071 [3]天津市地震局,天津300201

出　　处：《大地测量与地球动力学》2004年第2期14-22,共9页Journal of Geodesy and Geodynamics

基　　金：科技部 2 0 0 2年公益研究专项 (国科发财字 [2 0 0 2 ] 484号 );长江三峡工程开发总公司 2 0 0 3年专项资助项目 (CT -0 3 -0 7-0 2 )"长江三峡水库诱发地震监测研究"

摘　　要：在系统分析长江三峡诱发地震地下水动态监测井网 2 0 0 1～ 2 0 0 2年 8个井台 16个测项的地下流体正常动态及其影响因素的基础上 ,调查研究了井网外围 5 0km范围内两个中等地震震例 ,对比分析了 2 0 0 3年三峡水库蓄水前后各测项动态的变化 ,发现水库蓄水对三峡井网地下流体动态的影响是局部的 ,推测三峡库首区近期诱发中等以上水库地震的可能性不大 ;同时分析了受水库蓄水影响测项的异常特征及其机理 。On the basis of systematic analysis of the normal behaviors and their influence factors of subsurface fluids, including 16 observation items from 8 stations in 2001 and 2002, among the ground water monitoring well network for the Three Gorges induced earthquakes, two moderate events within 50 km are investigated and studied, and changes of all the observation items before and after the reservoir impounding during the year of 2003 are analyzed. The results indicate that the impacts of the impounding on subsurface fluid regimes are characterized locally. So it is not likely for a moderate event or above to occur within the dam areas recently. Also the features and mechanism of the anomalies influenced by the reservoir impounding are studied. More work should be done in this field and it plays an important role for the development of earthquake monitoring and prediction.

关 键 词：地下流体 三峡井网 水库蓄水 动态监测 诱发地震 

分 类 号：P315.728[天文地球—地震学]