天津高村井水位主要周期成分的干扰因素及特征分析

Analysis of Interfering Factors and Characteristics of Main Periodic Components of Well Water Level in Gaocun,Tianjin

以天津高村井水位与气压观测数据及理论固体潮为研究对象,首先利用别尔采夫滤波滤除其日波、半日波;其次利用一般多项式分段曲线拟合(按月分段),将周期在1-2个月内的月波滤除;再次利用小波分析研究高村井水位分钟值与气压、理论固体潮的关系,结果表明:1)高村井水位观测主要周期有日波、半日波、1-2月的月波及年周期;2)高村井水位的日波、半日波主要的影响因素为固体潮,它们之间为线性关系;3)高村井水位1-2月的月波频段受气压影响较显著,井水位与气压呈线性关系;4)小波分析结果表明,在64-256min频段高村井水位与气压线性相关程度较高,受气压影响显著.

In this paper,the observation data of water level and pressure in Gaocun well,Tianjin and the theoretical solid tide are researched.Firstly,the daily wave and semidaily wave are filtered out by Birzef filtering.Secondly,the general polynomial piecewise curve fitting(piecewise by month)is used to filter the monthly wave with a period of 1-2 months.Wavelet analysis is used to study the relationship between the short period information of gaocun well water level and meteorological factors.The results show that:1)The main periods of the Gaocun Well water level observation include daily waves,halfdiurnal waves,and monthly and annual cycles from January to February;2)The main influencing factors of the daily and semi-diurnal waves of the Gaocun well water level are solid tides.Linear relationship;3)The monthly wave frequency of Gaocun well water level from January to February is significantly affected by air pressure,and the well water level has a linear relationship with air pressure;4)Wavelet analysis results show that the water level of Gaocun well is linear with air pressure in the 64-256 min frequency band The correlation is relatively high,and it is significantly affected by air pressure.