Prediction of surface horizontal displacements, and gravity and tilt changes caused by filling the Three Gorges Reservoir |
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| Authors: | H Wang H T Hsu Y Z Zhu |
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| Institution: | (1) Laboratory of Dynamical Geodesy, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, 174 Xudong Road, Wuhan 430077, China e-mail: lgy@asch.whigg.ac.cn; Tel.: +86-27-8678 3920; Fax: +86-27-8678 3841, CN |
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| Abstract: | Horizontal displacements, and gravity and tilt changes induced by filling the Three Gorges Reservoir are modeled using elastic
loading Green functions. When the water surface reaches its highest level, the effects become maximum on the reservoir banks.
The longitudinal and latitudinal components of the horizontal displacements reach −8.2 and 7.7 mm respectively, gravity is
increased by up to 3.4 mGal, and the prime vertical and meridian components of the tilt changes are −7.8 and −17.5 arcseconds
respectively. Accordingly, the filling of the reservoir will influence values observed from global positioning system (GPS),
gravimetry and tilt measurements in the area. The results given can be used to provide important corrections for extracting
earthquake-related signals from observed data.
Received: 19 January 2001 / Accepted: 3 September 2001 |
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| Keywords: | : Numerical Modeling – Three Gorges Reservoir – Elastic Responses to Water Loads |
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