地下水位气压效应的消除及主要气压影响分波的识别
摘要
气压变化对地下水位微动态存在影响,而地下水位微动态变化通常携带了大量构造活动和地震异常信息,消除地下水位的气压效应对于有效识别地震异常信息具有重要意义.通过识别地下水位中主要气压影响分波并分析其变化,可以进一步探求地震过程中含水层介质的变化,进而达到预测地震的目的.本文以2008年5月12日汶川地震为例,利用南溪、巢湖与邛崃井的地下水位与气压观测数据,进行了地下水位的气压效应消除和影响地下水位的主要气压分波识别研究.通过2种回归方法得到了消除气压影响后的校正水位;利用调和分析法结合频谱分析识别了影响水位波动的气压分波;对地震前后影响井水位变化的气压分波进行了对比研究,发现地震前后主要气压影响分波发生了改变,各气压分波振幅也有不同程度的增减,这可能与气压分波各自周期性变化有关,也可能是地震造成含水层特性发生改变从而使井水位对气压的响应改变所致.
引文
1汪成民,车用太,万迪堃,等.地下水微动态研究.北京:地震出版社,1988.149–154
2巩浩波.地下水位微动态对应力的响应关系研究.硕士学位论文.吉林:吉林大学,2009.3-9,60–63
3Jacob C E.On the flow of water in an elastic artesian aquifer.Eos Trans AGU,l940,21:574–586
4Bredehoeft J D.Response of well-aquifer systems to earth tides.J Geophys Res,1967,72(12):3075–3087
5张昭栋,郑金涵,冯初刚.气压对水井水位观测的影响.地震,1986,(01):42–46
6张昭栋,郑金涵,张广城,等.承压井水位对气压动态过程的响应.地球物理学报,1989,32(05):539–549
7Roeloffs E A.Hydrological precursors to earthquake:A review.Pure Appl Geophys,1988,126:177–206
8Rojstaczer S.Determination of fluid flow properties from the response of water level in wells to atmospheric loading.Water Resour Res,1988,24(11):1927–1938
9张昭栋,郑金涵,张广城.井水位对气压响应的滞后及其机理.大地测量与地球动力学,1993,13(04):51–56
10晏锐.影响井水位变化的几种因素研究.硕士学位论文.北京:中国地震局地震预测研究所,2008.1–4,23–25
11Nathanial J T,Todd C R.Removal of barometric pressure effects and earth tides from observed water levels.Ground Water,2007,45(01):101–105
12Hsieh P A,Bredehoeft J D,Farr J M.Determination of aquifer transmissivity from earth tide analysis.Water Resour Res,1987,23(10):1824–1832
13Merritt M L.Estimating hydraulic properties of the Floridan aquifer system by analysis of earth-tide,ocean-tide,and barometric effects,Collier and Hendry counties,Florida.U S Geol Surv Water Resour Invest Rep,2004,03-4267:1–70
2巩浩波.地下水位微动态对应力的响应关系研究.硕士学位论文.吉林:吉林大学,2009.3-9,60–63
3Jacob C E.On the flow of water in an elastic artesian aquifer.Eos Trans AGU,l940,21:574–586
4Bredehoeft J D.Response of well-aquifer systems to earth tides.J Geophys Res,1967,72(12):3075–3087
5张昭栋,郑金涵,冯初刚.气压对水井水位观测的影响.地震,1986,(01):42–46
6张昭栋,郑金涵,张广城,等.承压井水位对气压动态过程的响应.地球物理学报,1989,32(05):539–549
7Roeloffs E A.Hydrological precursors to earthquake:A review.Pure Appl Geophys,1988,126:177–206
8Rojstaczer S.Determination of fluid flow properties from the response of water level in wells to atmospheric loading.Water Resour Res,1988,24(11):1927–1938
9张昭栋,郑金涵,张广城.井水位对气压响应的滞后及其机理.大地测量与地球动力学,1993,13(04):51–56
10晏锐.影响井水位变化的几种因素研究.硕士学位论文.北京:中国地震局地震预测研究所,2008.1–4,23–25
11Nathanial J T,Todd C R.Removal of barometric pressure effects and earth tides from observed water levels.Ground Water,2007,45(01):101–105
12Hsieh P A,Bredehoeft J D,Farr J M.Determination of aquifer transmissivity from earth tide analysis.Water Resour Res,1987,23(10):1824–1832
13Merritt M L.Estimating hydraulic properties of the Floridan aquifer system by analysis of earth-tide,ocean-tide,and barometric effects,Collier and Hendry counties,Florida.U S Geol Surv Water Resour Invest Rep,2004,03-4267:1–70
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心