复形法在反求水文地质参数中的应用

APPLICATION OF COMPLEX METHOD TO CALCULATING FOR HYDROGEOLOGY PARAMETERS

在众多的水文地质调参方法中,目前,经常使用的是单纯形法。此法虽很有效,但有一较大缺点,即在迭代过程中易出退化现象,从而使迭代难以继续,给计算造成很大的麻烦。复形法却因其顶点数增多,可使退化现象得到改善。在大水矿区水文地质参数反演计算中,尝试利用了复形法。结果表明:复形法稳定性能好,收敛速度快,求解精度高,节省时间,使用方便,所求参数基本上能代表所求区水文地质条件。复形法可求解高维(一般≤30维)有约束的非线性函数极值问题,它是求解多参数的水文地质反演问题的有效方法之一,适应于水文条件复杂、参数分区多的情况。

At the present time,single method as one of the methods used in calculation of hydrogeology parameters can give good results. But this method has a weakness which the single model can retrograde easily during computing procedure,which makes the computing can not continue. However, complex can avoid such result to some extent. So it is used more and more in many field. Complex method was used in this article to compute the hydrogeology parameters in one coal field where has been threatened by great amount of karst water,while the advantages and disadvantages were discussed. Conclusions prove to be that this method has good stability,converges rapidly and can give high precise solution. So we can save much time if we use complex method. In our practice,the parameters obtained with this method can present the hydrogeology conditions in the researching area.