| Summary: | 碩士 === 中原大學 === 土木工程學系 === 88 === This essay is a study of the fluctuation of the groundwater level of aquifer at groundwater well stations all over the north of Chou-shui River by filter analysis. Kuo-Sheng, Hsien-His, Fang-Yuan, His-Kang, and the south of Chou-shui River, Kang-Hou, Hou-An, Po-Tzu, are compared by each two-month hourly data of seawater at groundwater well stations in Wang-Kung and Po-Tzu-Liao, and then demonstrates the characteristics of fluctuation of the groundwater level.
After comparing the filter analysis and the observation, the results are as follows：(1)The diurnal, semidiurnal, ter-diurnal, quarter-diurnal, and six-diurnal fluctuant components and waves of all the groundwater well stations are partly similar to the periods of astronomical tidal level in Wang-kung and Po-Tzu-liaos. (2)It is shown us that the amplitude and fluctuation of groundwater level along the coast are higher and bigger than those inland. (3)The components of diurnal period and semidiurnal period are much clear. (4)The amplitude and fluctuation of groundwater level along the coast at the south of Chou-shui River are higher and bigger than those at the north of Chou-shui River. (5)The fluctuant energy of complex waves except the components of tides is very small. (6)The smoothing filter exactly makes the time series smooth, and it’s helpful to filter analysis.
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