Gravity change and its mechanism after the first water impoundment in Three Gorges Project

被引：1

作者：

孙少安 ^{[1
]}

项爱民 ^{[1
]}

朱平 ^{[2
]}

申重阳 ^{[1
]}

机构：

[1] Institute of Seismology,China Earthquake Administration

[2] Institute of Geophysics,China Earthquake Administration

来源：

Acta Seismologica Sinica(English Edition) | 2006年 / 05期

关键词：

the Three Gorges Project; the first water impoundment; gravity change;

D O I：

暂无

中图分类号：

P312.4 [地球的体潮、重力的时间变化];

学科分类号：

070801 ;

摘要：

In this paper we have analyzed precise gravity survey and gravity effects resulted from water loading,crustal de-formation,ground water level change and precipitation before and after the water impoundment in the Three Gorges Reservoir. We found that: 1 In dam area of the reservoir,gravity effect resulted from water load increase is the most significant,maximum gravity change is 200×10?8 m/s2,but this effect is limited in amplitude and range. Gravity change can be observed about 5 km offshore. The gravity change caused by ground water level change is regional; and the impact of precipitation on it should not be neglected. 2 At head area of the reservoir,the maxi-mum gravity change is near Xiangxi. Monitoring the variation of gravity field and further study should continue in the future.

引用

页码：522 / 529 +604

页数：9