中文摘要：

基于三峡库区DEM及现有GPS站点位置坐标数据，建立了三峡库区有限元网格模型，采用弹性有限元分析方法模拟计算水库蓄水至135m、156m和175m时库区地壳的垂直形变场；随后根据Farrell提出的质量负载原理产生的地壳形变理论计算库区蓄水至135m时的库区垂直形变场；通过两种模拟方法对比可以看出变形等值线圈都包络河谷线，变形最大处都出现在香溪段，同时区域沉降是一个综合地质作用，水体的重力作用是主要诱因。

英文摘要：

The finite element model of Three Gorges area was built based on DEM and the actual GPS stations＇ coordinates. The crustal vertically deformation of the Three Gorges reservoir area was calculated under the condition of 135 meter, 156 meter and 175 meter water level impoundment by means of the elasticity finite element analysis method respectively. Based on the Farrell＇s globosity deformation theory, the vertically deformation fields of the Three Gorges reservoir area was simulated under the condition of 135 meter water level impoundment. By comparing the two simulated fields, the mechanism of crustal vertically deformation are analyzed. The deformation isoline covered the valley line with the maximum in Xiangxi segment, and the regional sedimentation is synthetically geological function and the water body gravity as the main reason.