摘要
介绍了三峡工程蓄水前后的精密重力测量和取得的初步研究成果。观测资料表明 :库坝附近水荷载的直接重力效应明显 ,最大重力变化约 2 0 0× 10 -8ms-2 ,地下水渗透和地形变引起的间接重力效应 ,其影响范围离库岸约 5km ;库首区的最大重力变化区域在香溪附近 。
This paper presents the high precise gravity survey and primary results before and after the impoundment in the Three Gorges reservoir. The direct effects of gravity caused by water load near the dam area of the reservoir is evident, whose maximum is about 200×10-8ms-2. There are some indirect effects of gravity due to the infiltration of underground water and crustal deformation, and its affecting range is about 5 km from the bank. The maximum gravity change in the head area of the reservoir is near XiangXi.Monitoring the variation of gravity field and deeply study should succeed in the future.
出处
《大地测量与地球动力学》
CSCD
2004年第2期30-33,共4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"
关键词
蓄水
三峡工程
精密重力测量
重力变化
地下水渗透
地震监测
The Three Gorges project,before and after water impoundment, high precise gravity survey,gravity variety,infiltration of underground water
