| 华蓥山地区4口井水位潮汐动态特征研究 |
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| 引用本文： | 巩浩波,廖欣,李光科,陈敏.华蓥山地区4口井水位潮汐动态特征研究[J].震灾防御技术,2016,11(3):600-610. |
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| 作者姓名： | 巩浩波 廖欣 李光科 陈敏 |
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| 作者单位： | 重庆市地震局，重庆 401147,防灾科技学院，三河065201,重庆市地震局，重庆 401147,重庆市地震局，重庆 401147 |
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| 基金项目： | 2015年度震情跟踪定向工作任务（2015010303）；测震台网青年骨干培养专项（20150519） |
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| 摘 要： | 本文选择沿华蓥山断裂带分布的荣昌等4口观测井,利用Baytap-G潮汐分析方法,计算各井水位和气压及理论固体潮的潮汐振幅谱,比较其潮汐频谱差异,通过对主要潮汐分波振幅的回归计算定量分析各井水位受气压潮和固体潮影响的大小。基于对井水位正常动态的认识,选择各井水位潮汐的主要分波,对井水位长时序数据进行分析计算,提取水位潮汐响应特征参数(振幅比和相位差),进而探讨特征参数动态变化特征。最后对井水位受气压潮和固体潮影响的差异原因进行了初步探讨。结果表明,荣昌井水位主要受气压作用的影响,北碚、大足、南溪三口井水位受固体潮-气压潮综合作用的影响,而荣昌井水位只受气压潮影响可能与该井所处含水层裂隙发育且该井未下设止水套管有关;荣昌井P_1S_1K_1波和南溪井M_2波振幅比和相位差在几次大震后没有明显变化,说明地震波没有使井孔与含水层之间的水流交换发生显著变化,而北碚井和大足井M_2波振幅比和相位差分别在汶川和芦山地震时发生变化,反映了地震波的疏通影响。
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| 关 键 词： | 井水位 气压 固体潮 振幅比 相位差 |
| 收稿时间： | 2015/12/11 0:00:00 |
Dynamic Characteristics of Water Level Tides of Four Wells in the Huayingshan Area |
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| Gong Haobo,Liao Xin,Li Guangke and Chen Min.Dynamic Characteristics of Water Level Tides of Four Wells in the Huayingshan Area[J].Technology for Earthquake Disaster Prevention,2016,11(3):600-610. |
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| Authors: | Gong Haobo Liao Xin Li Guangke and Chen Min |
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| Institution: | Earthquake Administration of Chongqing Municipality, Chongqing 401147, China,Institute of Disaster Prevention, Sanhe 065201, Hebei, China,Earthquake Administration of Chongqing Municipality, Chongqing 401147, China and Earthquake Administration of Chongqing Municipality, Chongqing 401147, China |
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| Abstract: | We selected four observation wells along the Huayingshan fault zone, to study tidal amplitude spectrum of each well water level, barometric pressure, theoretical earth tide with the tidal analysis method provided by Baytap-G, and to compare the difference between tidal spectrum of each well. The influence of the barometric pressure and the earth tidal on the well water level was analyzed by regression calculation of the main tidal partial wave amplitudes. The results showed that, the water level change of Rongchang well is mainly caused by the barometric pressure, while the water level changes of other three wells are mainly caused by the barometric pressure combine with tide force. The water level of Rongchang well was only effected by the barometric pressure may be related to the fractured aquifer, and the well pipe without sealing casing. The amplitude ratios and phases of Rongchang well P1S1K1 wave and Nanxi Well M2 wave are not significantly changed after several large earthquakes. There is no significant change in flow exchange between the wellbore and the aquifer, caused by seismic waves. The changes of M2 wave amplitude ratio and phase of Beibei well and Dazu well occurred in the Wenchuan earthquake and the Lushan earthquake, reflecting the clear impact of seismic waves. |
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| Keywords: | Well water level Barometric pressure Earth tide Amplitude ratios Phases |
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