A physically and chemically heterogeneous aquifer : field study and reactive transport modelling
A physically and chemically heterogeneous aquifer : field study and reactive transport modelling
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物理和化学非均质含水层：现场研究和反应输运模型
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
P. L. Bjerg
中科院分区：
文献类型：
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作者：
J. S. Christiansen;P. Engesgaard;P. L. Bjerg
介绍了丹麦异质含水层水力传导率 (K) 和阳离子交换能力 (CEC) 空间变异性的地统计现场数据。这些数据用于生成相关的 K 和 CEC 场，用于蒙特卡罗分析，并对受非线性离子交换反应影响的阳离子进行多物种反应输运建模。蒙特卡罗分析表明，最延迟阳离子的表观色散是由大约 2/3 表观物理色散和 1/3 表观化学色散引起的。结果表明，表观化学色散是由于 CEC 的异质性和多物质离子交换的非线性效应导致的色散量大致相等。
Geostatistical field data on the spatial variability in hydraulic conductivity (K) and cation exchange capacity (CEC) of a heterogeneous aquifer in Denmark are presented. The data were used to generate correlated K and CEC fields for a Monte Carlo analysis with multi-species reactive transport modelling of cations affected by nonlinear ion exchange reactions. The Monte Carlo analysis shows that apparent dispersion of the most retarded cations is caused by approximately 2/3 apparent physical dispersion and 1/3 apparent chemical dispersion. It is shown that apparent chemical dispersion is due to approximately equal amounts of dispersion due to the heterogeneity in CEC and to the nonlinear effects of multi-species ion exchange.