Atoll permeability calculated from tidal diffusion
Atoll permeability calculated from tidal diffusion
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根据潮汐扩散计算环礁渗透率
DOI：
10.1029/jc079i021p03073
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发表时间：
1974
影响因子：
--
通讯作者：
R. K. Lam
中科院分区：
文献类型：
--
作者：
R. K. Lam
本文提出了一种从地下水潮汐的地面测量值计算环礁平均地下渗透率的方法。在托克劳群岛南部的一个环礁岛斯温斯岛进行了为期约一个月的潮汐测量。海洋、泻湖和陆地上的八口威尔斯井都有记录。将这些测量结果与数值模型进行比较，以预测地下渗透率。由于数据的复杂性，必须使用具有复杂但现实的表面边界条件的模型。潮汐振幅比较预测平均渗透率为4.4×10−6 cm 2，而相位考虑导致预测为14.1×10−6 cm 2。由于可以通过调整表面边界条件来模拟这组测量结果，因此无法调查斯温斯岛内部的不均匀性问题。
A method is presented for calculating the average subsurface permeability of an atoll from surface measurements of ground water tides. Tide measurements of about 1-month duration were taken on Swains Island, an atoll located in the southern Tokelau group. Records were obtained for the ocean, the lagoon, and eight wells on land. These measurements were compared with numerical models to predict subsurface permeability. The complex nature of the data necessitated the use of models with complicated but realistic surface boundary conditions. Tide amplitude comparisons predict a mean permeability of 4.4×10−6 cm2, whereas phase considerations lead to a prediction of 14.1×10−6 cm2. Because the set of measurements could be modeled by adjusting surface boundary conditions, it was not possible to investigate the question of inhomogeneity in the interior of Swains Island.