中国大陆地壳运动速度场模型的构建方法研究

发布时间：2018-05-02 03:31

本文选题：CGCS2000 + 块体划分　；参考：《辽宁工程技术大学》2013年硕士论文

【摘要】：中国于2008年7月1日正式启用2000国家大地坐标系(CGCS200)目前,CGCS2000坐标系只能提供对应于国际地球参考框架ITRF97,2000.0历元的静态坐标,这对于广泛采用的GPS精确定位(ITRF2005框架和当前历元)带来不便,若要进行历元转换,必须要有高分辨率的速度场资料。基于目前CGCS2000框架点的分布密度,还不能提供高密度的速度场信息,需要在中国大陆地区建立地壳运动速度场模型。通过对构建速度场模型的方法进行研究,为CGCS2000坐标系维持提供高密度的速度场模型。利用网络工程(1999年～2009年)近十年观测数据解算出的站点坐标及速度值作为建立中国大陆地壳运动速度场模型的数据源,分别采用反距离加权、欧拉矢量、有限元、最小二乘配置等方法建立中国大陆地壳运动速度场模型。根据分析得到的不同的模型及适用范围,综合上述方法在各块体构建最优速度场模型,计算中国大陆1°×1°格网点速度,建立格网速度场模型,介绍速度场模型的应用方法。基于河北省CORS网(2009-2012)的观测资料,解算出河北区域地壳垂直运动速度场,分析河北区域垂直形变,探讨诱发河北区域地面沉降的原因。采用多面函数法建立河北区域垂直运动速度场模型,计算河北区域30'×30'格网点垂直运动速度值并提供等值线图,为河北地区的经济建设、防灾减灾、地震等方面提供参考资料。
[Abstract]:China officially launched the 2000 National Geodetic coordinate system on July 1, 2008. At present, the CGCS2000 coordinate system can only provide the static coordinates corresponding to ITRF97 / 2000.0. This brings inconvenience to the widely used GPS precise positioning framework ITRF2005 and current epoch. For epoch conversion, it is necessary to have high resolution velocity field data. Based on the distribution density of CGCS2000 frame points at present, it is not possible to provide high density velocity field information, so it is necessary to establish a crustal movement velocity field model in the mainland of China. The method of constructing velocity field model is studied to provide a high density velocity field model for CGCS2000 coordinate system. In this paper, the data sources of crustal movement velocity field in mainland China are established by using the coordinates and velocities calculated from the network engineering (1999 ~ 2009) observation data in the past ten years. The inverse distance weighting, Euler vector and finite element method are used respectively. The velocity field model of crustal movement in mainland China is established by least square collocation and other methods. According to the different models and their application range, the optimal velocity field model is constructed in each block by the above methods, the 1 掳脳 1 掳grid velocity in mainland China is calculated, the grid velocity field model is established, and the application method of the velocity field model is introduced. Based on the observational data of CORS net in Hebei Province 2009-2012, the velocity field of vertical crustal movement in Hebei region is calculated, the vertical deformation in Hebei region is analyzed, and the causes of ground subsidence in Hebei region are discussed. The model of vertical motion velocity field in Hebei region is established by using multi-plane function method. The vertical motion velocity value of 30'脳 30'lattice dot in Hebei region is calculated and the isoline map is provided, which provides references for economic construction, disaster prevention and mitigation, earthquake and so on in Hebei area.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P227

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