利用资源三号(ZY-3)高分辨率多光谱遥感影像提取了三峡库区江河湖库水体数据,结合水位数据,通过负荷格林函数积分模型法模型计算出三峡水库蓄放水导致水位升降的过程中水体对地壳垂直及水平形变的影响。研究发现:①以1a为周期,三峡库区库岸及长江近岸地壳垂直及水平形变的趋势与水库的蓄放水时期对应;②三峡水库放水期间水位下降,水库库岸及长江近岸地面水平向内形变,方向指向江心,反之向外形变;蓄水期间水位上升,地面下降,反之地壳回弹。
This paper uses ZY 3 high resolution muhispectral remote sensing image to extract the river and lake water data in the Three Gorges reservoir area. The influence of water body on vertical and horizontal crustal deformation in the process of water level fluctuation of the Three Gorges reser voir is calculated by the load Green function integral model method. Results show that : ①for one year period, the verti- cal and horizontal deformation trend of the Three Gorges res- ervoir banks and the river shores corresponds to the water impoundment and drainage period; ②the water level drops during the Three Gorges reservoir drains, ground level of the reservoir shore and the Yangtze River coastal has an inward deformation, pointing to the middle of the river; otherwise deforms outward. During the storage, the water level rises, the ground falls.