| 二维强非均质含水层中渗透系数空间变异对污染物迁移的影响 |
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| 引用本文： | 王开丽,黄冠华.二维强非均质含水层中渗透系数空间变异对污染物迁移的影响[J].水利学报,2010,41(4). |
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| 作者姓名： | 王开丽 黄冠华 |
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| 作者单位： | 中国-以色列国际农业研究培训中心,北京,100083;中国农业大学水利与土木工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金，教育部新世纪优秀人才支持计划，长江学者创新团队发展计划资助，北京市重点学科"水文学及水资源"建设资助项目 |
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| 摘 要： | 对于强非均质介质,渗透系数的对数lnK的空间分布可表征为其增量遵从Levy稳定分布的非平稳随机场。本文利用改进的连续随机增量方法生成含水层lnK增量具有Levy稳定分布的统计特征的随机场;采用Monte-Carlo数值实验方法并结合MODFLOW与MT3DMS分别模拟研究区域内水流和溶质迁移过程,分析渗透系数强变异性对污染物浓度空间矩及宏观弥散的影响。结果表明:Levy指数α决定lnK的空间分布形状,宽度参数C则影响lnK的取值范围;污染物的质心位置与C、α的大小无关;C越大、α越小,污染物形状越不规则,污染物的扩散范围越大;且α越小,污染物具有明显的拖尾现象;纵向宏观弥散度随时间呈幂函数递增趋势。
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| 关 键 词： | 污染物迁移 渗透系数 空间变异性 Levy 稳定分布 Monte-Carlo 数值模拟 矩分析 宏观弥散度 |
Effect of hydraulic conductivity on contaminant transport in highly heterogeneous two-dimensional aquifers |
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| WANG Kai-li and HUANG Guan-hua.Effect of hydraulic conductivity on contaminant transport in highly heterogeneous two-dimensional aquifers[J].Journal of Hydraulic Engineering,2010,41(4). |
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| Authors: | WANG Kai-li and HUANG Guan-hua |
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| Affiliation: | WANG Kai-li1,2,HUANG Guan-hua1,2(1.China Agricultural University,Beijing 100083,China,2.Chinese International center for Research , Training in Agriculture,China) |
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| Abstract: | For the highly heterogeneous media,the logarithm hydraulic conductivity(lnK) is considered as a non-stationary random field with its increments following a Levy-stable distribution.In this paper,the successive random additional(SRA) algorithm is used to produce the lnK field of the aquifer based on the Levy-stable distribution.A Monte-Carlo simulation,with which the MODFLOW and MT3DMS are used to simulate water flow and contaminant transport respectively,is performed to investigate the impact of highly hete... |
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| Keywords: | contaminant transport hydraulic conductivity spatial variability Levy-stable distribution Monte-Carlo simulation moment analysis macrodispersivity |
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