| 利用有限单元伽勒金法反求非线性流情况下砾石层的渗透系数 |
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| 引用本文： | 罗焕炎,李洪吉,陈雨孙.利用有限单元伽勒金法反求非线性流情况下砾石层的渗透系数[J].地质科学,1976,11(1):56-63. |
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| 作者姓名： | 罗焕炎 李洪吉 陈雨孙 |
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| 作者单位： | 1. 中国科学院地质研究所;
2. 华北勘察院 |
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| 摘 要： | 地下水流问题的数字计算机的应用,现虽处于高度发展阶段,但在采用这种数学物理模型时,首先要知道含水层的导水性能。过去利用水位观察资料或抽水试验资料计算水文地质参数的方法,只能适用于简单的含水体系,由于高度复杂的地质体并且间隙水流为非线性的这类参数如何确定还没有解决,如果利用近期发展起来的有限单元法来反求参数是一种理想的选择,特别是与古典的伽勒金法结合起来,既可简化数学处理过程,并有利于解非线性流问题。古典的伽勒金法原来只能适用于简易的分析域,而且要求介质为均一,但与空间离散的有限单元法结合起来,还便于解非均质而且边界不规则的问题。
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| 关 键 词： | , |
FINITE ELEMENT GALERKIN METHOD FOR THE INVERSE PROBLEM OF NON-DARCY FLOW IN A GRAVEL AQUIFER |
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| LOO HUANYEN,LI HONGJI,CHEN YUSUN.FINITE ELEMENT GALERKIN METHOD FOR THE INVERSE PROBLEM OF NON-DARCY FLOW IN A GRAVEL AQUIFER[J].Chinese Journal of Geology,1976,11(1):56-63. |
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| Authors: | LOO HUANYEN LI HONGJI CHEN YUSUN |
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| Abstract: | Hydraulic gradient dependant permeability of a gravel aquifer is determined inversely using finite element Galerkin method. Comparison between the computed and measured hydraulic head distribution along the top of the aquifer shows a good agreement except near the pumped well.Natural aquifers are generally highly complex systems, both time and space dependant, the inverse problem in groundwater flow is thus very difficult to handle, and it clearly is not amenable to complete solution within the context of a single paper. However, the application of this method to a nonlinear problem appears to be a valuable step toward the goal of establishing a systematic proceduce for geological parameter identification. |
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