| 成建梅.考虑可信度的弥散度尺度效应分析[J].水利学报,2002,33(2):0090-0094 |
| 考虑可信度的弥散度尺度效应分析 |
| Analysis on field scale effect of dispersivity in consideration of relative reliability level of data |
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| DOI： |
| 中文关键词: 弥散度尺度效应 加权最小二乘法 可信度 分维值 |
| 英文关键词: scale effect dispersivity weighted least-square data fitting relative reliability fractal dimension |
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| 摘要点击次数: 2173 |
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| 中文摘要: |
| 弥散度是表征含水层中介质弥散特征的重要参数, 具有尺度效应性质, 它反映了含水层介质空间结构的非均质性. 本文收集了大量国内外在不同试验尺度下和实验条件下分别运用解析方法和数值方法所得的纵向弥散度资料; 考虑各种资料数据的可信度, 将其分为Ⅰ、Ⅱ、Ⅲ级, 并以可信度为权重, 运用加权最小二乘法对纵向弥散度与试验尺度数据进行了分析. 通过给3级可信度资料赋予不同的权重, 计算出了3种权值方案(2:1.5:1、3:2:1、1:1:1)条件下纵向弥散度尺度效应的分维值, 得到不同空隙介质在不同计算方法条件下的纵向弥散度尺度效应分维值, 为弥散度参数初步估计提供依据. |
| 英文摘要: |
| The dispersivity parameter reflecting the characteristics of aquifer heterogeneity is characterized by field scale effect, which is one of the most important parameters representing the dispersion feature of aquifer. A number of disperivity data obtained from laboratory and experiments in site are collected to analyze the relation between dispersivity and field scale. Taking account of the relative reliability of the data, the weighted least-square data fitting method, in which weight value is assigned according to the reliability of the data, is used to calculate the fractal dimension in the aquifer void media so that the accuracy of dispersivity for preliminary evaluation can be improved. |
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