ANALYZING the RESPONSE of GROUNDWATER LEVEL to TIDAL WAVE in COASTAL AQUIFER, TAOYUAN, TAIWAN

Duong Quynh Thanh, Chuen Fa Ni, Wei Ci Li, Nguyen Dinh Giang Nam

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Groundwater fluctuation in the coastal region is affected primarily by tidal oscillation. This study aimed to identify the effects of ocean tides on groundwater levels in the coastal aquifer of the Taoyuan-Hukou Table plain, Taiwan. In this study, Fast Fourier Transform (FFT) analysis was conducted to investigate the frequency of groundwater level based on the field monitoring data. The field observation showed that groundwater level fluctuates following the tide and fluctuations similar to a waveform, which suggested tidal wave-induced groundwater level changes periodically. The frequency analysis indicated that groundwater fluctuation was influenced by the multi constituents tide and significant component of the semidiurnal tide (M2) dominant with a period of 12.3 hours. The results also indicated that the fluctuation amplitudes decreased exponentially, and phase lag increased linearly for dominant tidal signals as they propagated inland. The tidal effects on the groundwater level reached up to 400 m inland from the coast.

Original languageEnglish
Title of host publication42nd Asian Conference on Remote Sensing, ACRS 2021
PublisherAsian Association on Remote Sensing
ISBN (Electronic)9781713843818
StatePublished - 2021
Event42nd Asian Conference on Remote Sensing, ACRS 2021 - Can Tho, Viet Nam
Duration: 22 Nov 202126 Nov 2021

Publication series

Name42nd Asian Conference on Remote Sensing, ACRS 2021

Conference

Conference42nd Asian Conference on Remote Sensing, ACRS 2021
Country/TerritoryViet Nam
CityCan Tho
Period22/11/2126/11/21

Keywords

  • Fast Fourier Transform (FFT)
  • groundwater level
  • ocean tides
  • Taoyuan-Hukou Table Plain

Fingerprint

Dive into the research topics of 'ANALYZING the RESPONSE of GROUNDWATER LEVEL to TIDAL WAVE in COASTAL AQUIFER, TAOYUAN, TAIWAN'. Together they form a unique fingerprint.

Cite this