ON GENETIC ALGORITHM FOR 3D INVERSION OF UNDERGROUND DENSITY CHANGES
Xuan Songbai 1) ; Shen Chongyang 1) ;Sun Shaoan 1) ;Liu Jie 2) ; Li Hui 1) ; and Liu Shaoming 1)
1)institute of Seismology,CEA,Wuhan 4300712)China Earthquake Network Center,CEA,Beijing 100036
Abstract The method for inversing density changes of underground abnormal body with genetic algorithm by use of the repeated gravity data is described. The validity and stability of this method are proved by simulating trial calculation.The density changes before and after the first water impounding of Three Gorges Reservoir are inversed. Considering some possible situations of underground rock body’s density changes caused by the water impounding, four priori density contrasts are used to fit the remaining gravity changes obtained by repeat gravity data from April to July 2003 after deducting the gravity changes caused by the water loading. Some meaningful results are given.
Key words ：
gravity data
genetic algorithm(GA)
density change
inversion
water impounding
Received: 01 January 1900
Corresponding Authors:
Xuan Songbai
Cite this article:
Xuan Songbai ,Shen Chongyang ,Sun Shaoan et al. ON GENETIC ALGORITHM FOR 3D INVERSION OF UNDERGROUND DENSITY CHANGES[J]. , 2008, 28(1): 36-40.
Xuan Songbai ,Shen Chongyang ,Sun Shaoan et al. ON GENETIC ALGORITHM FOR 3D INVERSION OF UNDERGROUND DENSITY CHANGES[J]. jgg, 2008, 28(1): 36-40.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2008/V28/I1/36
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