Improvements in a simple harmonic analysis of groundwater time series based on error analysis on simulated data of specified lengths

Improvements in a simple harmonic analysis of groundwater time series based on error analysis on simulated data of specified lengths
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基于指定长度模拟数据误差分析的地下水时间序列简谐分析的改进

DOI:
10.1007/s10333-016-0525-3
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发表时间:
2016
影响因子:
2.2
通讯作者:
Satoshi Ishida
Satoshi Ishida
中科院分区:
农林科学4区
文献类型:
--
作者:
Katsushi Shirahata;Shuhei Yoshimoto;Takeo Tsuchihara;Satoshi Ishida

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潮汐响应法是研究海岛和沿海高渗透地质条件下含水层水力特性的一种有效方法。本研究扩展了一种简单而直接的调和分析技术,该技术是最近作为潮汐响应方法应用于淡水透镜体含水层的一部分。用人工合成的由多个真实潮汐分量组成的时间序列检验了这一简单的分析技术。如果分析的时间序列长度受到适当的限制,则主要的日和半日分量的分析输出是足够准确的。简单调和分析在适用的时间序列长度内的局限性源于在有限长度的分析中发生的潮汐分量干扰。最终推荐的简单调和分析技术结合了时间序列长度和可提取潮汐分量的适当组合,便于研究含水层的水力特性,例如在淡水透镜是唯一淡水资源的偏远岛屿上。
Tidal response method is an efficient technique for investigating hydraulic properties of an aquifer in insular and coastal areas of highly permeable geological settings. The present study extends a simple and straightforward harmonic-analysis technique recently introduced as part of a tidal response method applied to a freshwater-lens aquifer. This simple analysis technique was examined with artificially synthesized time series composed of multiple realistic tidal components. The analysis outputs of major diurnal and semidiurnal components are sufficiently accurate if the analyzed time-series length is appropriately restricted. Limitations of the simple harmonic analysis in the applicable time-series length arise from tidal-component interference that occurs in analyses over a finite length. Definitively recommended simple harmonic-analysis technique with appropriate combinations of time-series lengths and extractable tidal components are convenient for investigating hydraulic properties of an aquifer, such as on a remote island where the freshwater lens is the only freshwater resource.
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