基于最频值法直线图解水文地质参数

由抽水试验数据应用计算机进行直线图解水文地质参数时,拟合直线的方法是基于最小二乘理论,但该方法易受异常值影响,拟合结果常常不理想,从而导致求解的参数值误差较大。相比最小二乘法,基于信息损失最小化的最频值算法对异常值不敏感,是一种更为稳健的算法。本文将最频值算法与直线图解法耦合,推导出了求解导水系数和贮水系数的新公式。最后,通过MATLAB环境下自行编制的程序,以一个抽水试验为例,对两种直线图解法进行了对比。结果表明,基于最频值算法的直线图解法求参结果更准确可靠。

Solving hydrogeologic parameters by linear graphic approach based on the most frequent value method

When solving hydrogeologic parameters by linear graphic approach,it is dealt with computer under pumping test data,the method of fitting line is basing on the least squares principle.However,this method is easily influenced with outliers,and the fitting result is usually not satisfying,thus it leads to the errors of parameters.Compared with the least squares principle,the most frequent value method(MFV),which is theoretically derived from the minimization of information loss,is insensitive to outliers,so(it...