Coseismic response of water level in Changping well, China, to the Mw 9.0 Tohoku earthquake
Coseismic response of water level in Changping well, China, to the Mw 9.0 Tohoku earthquake
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中国昌平井水位对东北9.0级地震的同震响应
DOI：
10.1016/j.jhydrol.2015.11.005
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发表时间：
2015-12
影响因子：
6.4
通讯作者：
Xuanhui Yang
中科院分区：
文献类型：
--
作者：
Xiaolong Sun;Guangcai Wang;Xuanhui Yang
安装在中国昌平井的水位计记录了2011年3月11日东北Mw9.0地震引起的同震波动和阶跃变化。在这里，我们分析了水位在井和垂直地面运动记录在附近的地面站点之间的相关性，我们研究这两个数据集的特性和井含水层系统参数之间的关系。在P波和S波到达期间，水位提供了有关高频地面运动增强的信息。在表面波到达期间，水位波动的幅度与垂直分量的表面运动的速度密切相关。这两个参数的波动周期在15-35 s的范围内，振荡周期显示出由大到小的特征行为。面波引起的压力脉动对昌平井水位的放大作用相对较小，但同震期间呈现出由低到高的特征，这与地震波作用使含水层渗透性逐渐增强有关。水位同震阶跃上升与地震波作用下含水层渗透性增强有关，水位潮汐响应特征反演结果表明，昌平井附近渗透性响应于东北地震波的作用而增加了6.56 × 10− 14 m2。
A water-level meter installed in Changping well, China, recorded coseismic fluctuations and a step change induced by theMw9.0 Tohoku earthquake of 11 March 2011. Here we analyse the correlation between water level in the well and vertical ground motions recorded at a nearby surface site, and we examine the relationship between the characteristics of these two datasets and the well-aquifer system parameters. During the arrival period of P- and S-waves, the water level provides information about the intensification of high-frequency ground motions. During the arrival period of the surface waves, the amplitude of water-level fluctuations was closely related to the velocity of vertical-component surface motions. The fluctuation periods of these two parameters are in the range 15–35 s, and the period of oscillation displays a large-to-small characteristic behaviour. The amplification effect on the water level in Changping well, driven by the pressure fluctuation induced by the surface wave, was relatively small, but a low-to-high characteristic is apparent during the coseismic period, related to the gradual enhancement of aquifer permeability due to the action of seismic waves. The coseismic step increase in water level was related to the enhancement of aquifer permeability under the action of seismic waves, and the results of an inversion of water-level tidal-response characteristics show that permeability increased by ∼6.56 × 10−14m2in the vicinity of Changping well in response to the action of seismic waves emanating from the Tohoku earthquake.
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影响因子：
5.2
作者：
Chi‐yuen Wang;D. Dreger;Chung-Ho Wang;D. Mayeri;J. Berryman
通讯作者：
Chi‐yuen Wang;D. Dreger;Chung-Ho Wang;D. Mayeri;J. Berryman
影响因子：
2.2
作者：
D. Mays
通讯作者：
D. Mays
影响因子：
--
作者：
E. Roeloffs
通讯作者：
E. Roeloffs
影响因子：
5.8
作者：
Chi‐yuen Wang;Chung-Ho Wang;M. Manga
通讯作者：
Chi‐yuen Wang;Chung-Ho Wang;M. Manga
影响因子：
64.8
作者：
Elkhoury, Jean E.;Brodsky, Emily E.;Agnew, Duncan C.
通讯作者：
Agnew, Duncan C.