川滇地区井水位潮汐响应特性分析

摘要/Abstract

摘要： 利用Baytap-G潮汐分析软件对川滇地区12口观测井数字化水位的长时序数据进行计算, 提取井水位潮汐响应特征参数(振幅比和相位差), 分析其形态、阶段变化等特征, 探讨地震前后井水位潮汐响应特征参数的变化情况, 为深入分析井水位与固体潮、气压之间响应关系的研究提供新的方法和途径。结果表明, 泸沽湖井等10口受固体潮影响的井水位振幅比和相位差变化相对稳定; 而南溪井和大姚井受到气压-固体潮综合作用影响的井水位振幅比和相位差变化则比较离散。其中江油川10井、泸沽湖井、东川井等3口井水位振幅比和相位差对大震的响应显著, 并给出了地震能量密度与这三口井水位M₂波相位差和振幅比的变化关系。

关键词: 井水位, 潮汐响应, 川滇地区

Abstract: In this paper, the long time series of well water-level data of 12 wells in Sichuan and Yunnan area are analyzed by the tidal analysis software of Baytap-G, and well water level tidal response characteristic parameters (amplitude ratio and phases) are extracted . We analyzed the features of shape and stage change, and characteristic parameters of the tidal response of well water level before and after earthquakes, which can provide a new method and approach to analyze the response relationships between well water level and earth tide and barometric pressure. The results show that Luguhu well and other 9 wells are affected by earth tides, and their well water level amplitude ratios and phases are relatively stable; Nanxi Well and Dayao Well water level changes are affected by the barometric pressure combined with tide force, their well water level amplitude ratios and phases are more discrete. The water level amplitude ratios and phases of Jiangyou Well, Luguhu Well and Dongchuan Well are significant to large earthquakes, the relationship between the seismic energy density and the water level amplitude ratios and phases of M2 wave of the three wells are presented.

Key words: Well water level, Barometric pressure, Earth tide, Amplitude ratios

中图分类号:

P315.7

巩浩波,李光科,廖欣,陈敏. 川滇地区井水位潮汐响应特性分析[J]. 地震, 2017, 37(1): 20-30.

GONG Hao-bo,LI Guang-ke,LIAO Xin,CHEN Min. Tidal Response Characteristics of Well Water Level in Sichuan—Yunnan Region[J]. EARTHQUAKE, 2017, 37(1): 20-30.

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