基于DEM的三峡库区垂直形变场格林函数法模拟

GREEN FUNCTION SIMULATION ON VERTICAL DEFORMATION FIELD IN THREE GORGES REGION BASED ON DEM

利用全球免费的高精度DEM数据——SRTM数据,依据Farrell提出的质量负载产生的地壳形变理论,计算三峡库区3次蓄水后的垂直形变。结果表明,库区垂直形变分布严格遵守三峡库区新增库容,形变量随离岸距离增加急剧衰减,最大值出现在香溪段,坝区次之。

Using the global free accurate DEM data—SRTM data,the vertical deformation of Three Gorges region was calculated 3 times according to the Farrell s crustal deformation theory.All of the results show that,the vertical deformation distributed according to the new increased loading of Three Gorges seriously,and the values reduce rapidly as the distance from the reservoir bank increases.The max deformation appears in Xiangxi segment,followed by dam segment.