基于小波分析的水位观测气压效应研究

Abstract

Abstract: To investigate the main characteristics of the barometric pressure effects on groundwater level, we use groundwater level data and barometric pressure data in Nanning Shibu and Nanning Jiutang station to reveal period characteristics of both as well as their relations in time-frequency space by wavelet analysis, cross wavelet and wavelet coherence. Wavelet power spectrum shows that period band between 7.8 and 14.7 hours is the same significant period band for both groundwater level and barometric pressure. Another significant period band of barometric pressure is between 17.5 and 27.8 hours. Cross wavelet analysis indicates that the resonant period of groundwater level and barometric pressure is between 7.8 and 14.7 hours. The results of the wavelet coherence analysis show that groundwater level and barometric pressure have significant correlation in a wider period band, and the correlation coefficient of groundwater level and barometric pressure changes over period and time, and their relative phase angle also show differences due to difference of cycle.

Key words: Groundwater level, Barometric effect, Wavelet analysis, Time-frequency space

CLC Number:

P315.7

YUAN Yong-dong,Zhou Rui,MO Pei-chan,XIANG Wei,FU Heng. Wavelet Analysis of Barometric Pressure Effects on Groundwater Level[J]. EARTHQUAKE, 2017, 37(4): 162-172.

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Wavelet Analysis of Barometric Pressure Effects on Groundwater Level

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