利用精密水准数据分析晋冀蒙交界区垂直形变特征

The Analysis of Vertical Deformation Characteristics in Shanxi-Hebei-Inner Mongolia Area Using Precise Leveling Data

在水准复测数据分析过程中,针对水准点遭到破坏导致数据连续性不佳、利用率降低等情况,利用相邻年份同名水准点数据求解垂直形变量,以距离、待内插点与观测点所处断层信息进行确权,构建多项式内插模型,对研究区范围内的垂直形变量进行内插,丰富研究区范围内的数据量,提高数据的连续性及利用率。以每个内插值的垂直形变量、形变速率、形变加速率组成的状态向量构建卡尔曼滤波模型,对研究区范围进行滤波,利用滤波结果对1984年以来晋冀蒙交界区的垂直形变特征进行分析,并与前人研究结果进行对比。实验证明本文方法有效,对地震预测的研究有一定的参考意义。

In the process of level retest data analysis,in view of the destruction of the benchmark point,the data continuity is poor and the utilization rate is reduced.In this paper,the vertical point variable of the same name is selected in the adjacent year.The distance,the interpolation point and the fault information at the observation point are used to determine the weight,construct a polynomial interpolation model,interpolate the vertical variables in the measurement area,enrich the data volume of the measurement area,and improve data continuity and utilization.We construct the Kalman filter model by constructing the state vector with the vertical shape variable,deformation rate and deformation acceleration rate of each interpolation value,and filtering the range of the measurement area.Using the filtering results,we analyze the vertical deformation characteristics of the Shanxi-Hebei-Inner Mongolia border area since 1984 and compare them with previous research results.The experiment proves the method is effective and can be applied to the study of earthquakes.