| 海原甘盐池地震观测井水位动态特征分析 |
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| 引用本文： | 朱鹏涛,丁风和,沈宁,贺嘉伟,李新艳,王晨曦.海原甘盐池地震观测井水位动态特征分析[J].西北地震学报,2022,44(6):1489-1496. |
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| 作者姓名： | 朱鹏涛 丁风和 沈宁 贺嘉伟 李新艳 王晨曦 |
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| 作者单位： | 宁夏回族自治区地震局,宁夏 银川 750001 |
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| 摘 要： | 影响因素及埋藏类型是地下水观测数据前兆分析的重要资料.通过海原甘盐池拉分盆地内两口地震水位观测井(GYC 和 GYCN 井)的气压、降雨与水位资料,综合分析水位变化的影响因素,并分别利用阶跃响应函数、频谱分析法、潮汐波群相位超前或滞后法分析地下水埋藏类型.结果表明:(1)气压和降雨是影响海原甘盐池两口地震观测井水位动态变化的主要因素.(2)GYC井地下水埋藏类型为混合水,与该井成井时的判定资料不一致(承压水),可能与其时间较长、长年失修、存在破损现象有关,或受地表水影响较大 ；GYCN 井地下水埋藏类型为承压水.该研究结果为该地区地震水位观测井的准入(退出)机制、今后观测井点的勘选等提供科学依据,对今后异常识别和震情跟踪具有重要意义.
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| 关 键 词： | 地震观测井 井水位 影响因素 地下水埋藏类型 |
Dynamic characteristics of water levels of the Ganyanchi seismic observation wells in Haiyuan, China |
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| ZHU Pengtao,DING Fenghe,SHEN Ning,HE Jiawei,LI Xinyan,WANG Chenxi.Dynamic characteristics of water levels of the Ganyanchi seismic observation wells in Haiyuan, China[J].Northwestern Seismological Journal,2022,44(6):1489-1496. |
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| Authors: | ZHU Pengtao DING Fenghe SHEN Ning HE Jiawei LI Xinyan WANG Chenxi |
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| Institution: | Earthquake Agency of Ningxia Hui Autonomous Region,Yinchuan 750001 ,Ningxia,China |
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| Abstract: | Influencing factors and burial types play an important role in the precursor analysis of groundwater observation data.In this study,on the basis of the air pressure,rainfall,and water level data of two wells in the Ganyanchi pull-apart basin of Haiyuan,namely,the GYC and GYCN wells,the influencing factors of water level change were analyzed,and the burial types of groundwater were studied by using three methods: the step response function,frequency spectrum analysis,and phase advance/phase lag of the tidal wave group method.Results showed that (1) air pressure and rainfall are the primary factors affecting the dynamic variation in the water levels of the two wells.(2) As a result of circulation for a long period,disrepair,casing damage,and the great effects of surface water,the burial type of groundwater in the GYC well is mixed water,which is inconsistent with the type of confined water recorded in historical data.The groundwater of the GYCN well is confined water. The research results provide a scientific basis for the access (exit) mechanism of the water levels of observation wells and the position of future observation wells in the study area. Furthermore, the findings are of great significance for anomaly identification and earthquake situation tracking in the future. |
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