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| 长江三峡库区地震地形变监测研究 | |
| 引用本文： | 杜瑞林,邢灿飞,伍中华,李胜乐,乔学军,游新兆,王琪,孙少安,申重阳,凌模.长江三峡库区地震地形变监测研究[J].大地测量与地球动力学,2004,24(2):23-29. |
| 作者姓名： | 杜瑞林 邢灿飞 伍中华 李胜乐 乔学军 游新兆 王琪 孙少安 申重阳 凌模 |
| 作者单位： | 1. 中国地震局地震研究所,武汉,430071 2. 长江水利委员会长江勘测规划设计研究院,武汉,430010 3. 中国地震局分析预报中心,北京,100036 |
| 基金项目： | 地震科学联合基金 ( 10 3 0 3 0 ,60 2 0 15 )，科技部 2 0 0 2年公益研究专项项目(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： | 三峡地壳形变监测网络结合空间大地测量(GPS、InSAR)和传统大地测量的优点，在1998年以来的三峡工程建设期间和2003年水库首次蓄水中获取了大量监测成果。结果显示库区地壳运动的基本图像：垂直形变较为显著，主要来自因蓄水荷载而产生的形变，水平形变不明显．库区主要断层的活动性在蓄水期间有明显加强迹象。水准测量反映从1998年首期观测至2003年10月首次蓄水后的库区垂直位移．沉降范围较大；GPS给出了2003年蓄水前后库区的垂直位移，形变的范围主要集中在水库近岸区域。水准测量与GPS观测反应的垂直位移的量级基本一致，沉降的最大幅度在3～4cm左右。水准监测、GPS观测与重力监测结果有一定的对应性。从地壳形变监测与研究结果分析，近期负荷改变而诱发中强地震的可能性不大。 |
| 关 键 词： | 长江三峡 空间大地测量 监测 地壳形变 诱发地震 |
| 文章编号： | 1671-5942(2004)02-0023-07 |
| 修稿时间： | 2004年1月9日 |
CRUSTAL DEFORMATION OF THREE GORGES AREA |
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| Du Ruilin,Xing Canfei,Wu Zhonghua,Li Shengle,Qiao Xuejun You Xinzhao,Wang Qi,Sun Shaoan,Shen Chongyang and Ling Mo Institute of Seismology,CEA,Wuhan Changjiang Institute of Survey,Planning,Design and Research,CWRC Center for Analysis and Prediction,CEA,Beijing.CRUSTAL DEFORMATION OF THREE GORGES AREA[J].Journal of Geodesy and Geodynamics,2004,24(2):23-29. | |
| Authors: | Du Ruilin Xing Canfei Wu Zhonghua Li Shengle Qiao Xuejun You Xinzhao Wang Qi Sun Shaoan Shen Chongyang and Ling Mo Institute of Seismology CEA Wuhan Changjiang Institute of Survey Planning Design and Research CWRC Center for Analysis and Prediction CEA Beijing |
| Institution: | Du Ruilin1),Xing Canfei1),Wu Zhonghua2),Li Shengle1),Qiao Xuejun1) You Xinzhao3),Wang Qi1),Sun Shaoan1),Shen Chongyang1) and Ling Mo1) 1)Institute of Seismology,CEA,Wuhan 4300712)Changjiang Institute of Survey,Planning,Design and Research,CWRC 4300103)Center for Analysis and Prediction,CEA,Beijing 100036 |
| Abstract: | A good number of monitoring data has already been obtained by the crustal deformation network of the Three Gorges reservoir-induced earthquake monitoring system combined with space geodesy ,such as GPS and InSAR, and the traditional geodesy since 1998, especially during reservoir impounding in 2003.These data show the basic characters of crustal deformation in the Three Gorges reservoir area,which includes:the vertical subsidence is substantial and the horizontal deformation is modest, the activity of the main faults in the reservoir area has been intensified during reservoir impounding.In addition,leveling data shows that there was a large vertical displacement from 1998 to the first reservoir impounding in 2003.And GPS data shows that the vertical deformation is mainly located in shore of the reservoir before and after impoundment.The magnitudes of vertical displacement surveyed by leveling and GPS are consistent with each other and the maximum value is about 3-4 cm. Leveling, GPS and Gravity observations are corresponding to each other. According to the crustal deformation observation data and analysis, the induced earthquake caused by water load change would not likely to occur in the near future. |
| Keywords: | the Three Gorges space geodesy monitoring crustal deformation induced earthquake |
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