Groundwater level changes related to the ground shaking of the Noto Hanto Earthquake in 2007

Itaba, Satoshi; Koizumi, Naoji; Matsumoto, Norio; Takahashi, Makoto; Sato, Tsutomu; Ohtani, Ryu; Kitagawa, Y.; Kuwahara, Yasuto; Sato, Takashi; Ozawa, Kunio

doi:10.1186/bf03352872

Cited by 12 publications

(5 citation statements)

References 20 publications

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“…Dynamic strain, induced by the passage of seismic waves, can also cause groundwater‐level changes (Montgomery & Manga ; Itaba et al . ). Several studies have investigated the relationship between co‐seismic water‐level changes and ground shaking in Taiwan and Japan (Wang et al .…”

Section: Mechanisms Of the Co‐seismic Water‐level Changementioning

confidence: 97%

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Continental‐scale water‐level response to a large earthquake

et al. 2014

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Co-seismic groundwater-level changes induced by earthquakes have been reported for thousands of years. The M8.0 Wenchuan earthquake caused co-seismic groundwater-level responses across the Chinese mainland. Three types of changes were recorded in 197 monitoring wells: co-seismic oscillations ranging in amplitude from 0.004 to 1.1 m, immediate co-seismic step changes ranging from 0.0039 to 9.188 m, and more gradual postseismic changes ranging from 0.014 to 1.087 m. We find that the co-seismic groundwater-level response is complex. There is neither a clear relationship between the response amplitude and the distance from the epicenter, nor a clear relationship between the groundwater response and lithology at the continental scale. Both the sign and amplitude of water-level changes are random at the continental scale, and a poroelastic response to the coseismic static strain cannot explain most of the co-seismic changes. However, wells located near the edges of tectonically active blocks have larger response amplitudes than those in the middle of these 'stable' blocks. Considered together, these observations indicate that permeability enhancement caused by the earthquake is a significant or dominant mechanism causing water-level changes. These data indicate that large earthquakes can cause the widespread permeability changes in the shallow crust although the magnitude of permeability change is uncertain.

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Section: Mechanisms Of the Co‐seismic Water‐level Changementioning

confidence: 97%

“…; Wong & Wang ; Itaba et al . ). As the peak ground velocity ( PGV ) is proportional to the dynamic strain (Brodsky et al .…”

Section: Mechanisms Of the Co‐seismic Water‐level Changementioning

confidence: 97%

Continental‐scale water‐level response to a large earthquake

et al. 2014

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“…Modeling of volumetric strain due to fault movement during earthquakes has been conducted in previous studies Rojstaczer et al 1995;Koizumi et al 1996;Quilty and Roeloffs 1997;Grecksch et al 1999;Lee et al 2002;Matsumoto et al 2003;Koizumi et al 2004;Itaba et al 2008;Shi et al 2014;Cucci and Tertulliani 2015). The polarities of some calculated strains are moderately consistent with the observed changes; however, the magnitude of most calculated strains did not match the observed changes Grecksch et al 1999;Matsumoto et al 2003;Koizumi et al 2004;Itaba et al 2008;Shi et al 2014). Long-term data of groundwater level in the near-field revealed that only co-seismic falls were recorded at LJ3 and 11 out of 13 changes were co-seismic rises at PD.…”

Section: Discussionmentioning

confidence: 72%

Impacts of hydrogeological characteristics on groundwater-level changes induced by earthquakes

et al. 2017

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Changes in groundwater level during earthquakes have been reported worldwide. In this study, field observations of co-seismic groundwater-level changes in wells under different aquifer conditions and sampling intervals due to near-field earthquake events in Taiwan are presented. Sustained changes, usually observed immediately after earthquakes, are found in the confined aquifer. Oscillatory changes due to the dynamic strain triggered by passing earthquake waves can only be recorded by a high-frequency data logger. While co-seismic changes recover rapidly in an unconfined aquifer, they can sustain for months or longer in a confined aquifer. Three monitoring wells with long-term groundwaterlevel data were examined to understand the association of coseismic changes with local hydrogeological conditions. The finite element software ABAQUS is used to simulate the porepressure changes induced by the displacements due to fault rupture. The calculated co-seismic change in pore pressure is related to the compressibility of the formation. The recovery rate of the change is rapid in the unconfined aquifer due to the hydrostatic condition at the water table, but slow in the confined aquifer due to the less permeable confining layer.Fracturing of the confining layer during earthquakes may enhance the dissipation of pore pressure and induce the discharge of the confined aquifer. The study results indicated that aquifer characteristics play an important role in determining groundwater-level changes during and after earthquakes.

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“…Since then, digital and automatic instrumental records of water level changes during earthquakes have become available, and significant achievements have been obtained in terms of quantitative analyses (Cooper et al 1965;Roeloffs 1998;Wang and Manga 2010). With an abundance of observational data, the co-and post-seismic changes in the water levels of wells have been reported and are among the most widely documented earthquake-induced hydrologic phenomena (Wang and Manga 2010); for example, the changes in groundwater and the mechanisms associated with earthquakes have been studied in the U.S. (Rojstaczer and Wolf 1992;Peltzer et al 1996), Japan (Wakita 1975;Akita and Matsumoto 2004;Itaba et al 2008), India (Ramana et al 2007;Radhakrishnan et al 2010), Europe (Grecksch et al 1999), and China (Lee et al 2002(Lee et al , 2004Zheng et al 2012;Shi et al 2013;Sun et al 2015;He et al 2016He et al , 2017aHe et al , 2017b. There are four possible causal mechanisms that we have summarized from existing studies.…”

Section: Introductionmentioning

confidence: 99%

“…That is, the water level will rise in contraction zones and fall in regions of dilation (Wang and Manga 2010). Itaba et al (2008) computed that the sensitivity of the groundwater level to the crustal volumetric strain ranges from a few centimeters to 10 À8 strain. However, there is some evidence (Koizumi et al 2004;Wang and Manga 2010) that contradicts this hypothesis.…”

Section: Introductionmentioning

confidence: 99%

Groundwater level response to the Wenchuan earthquake of May 2008

Anhua¹,

Singh

2018

Geomatics, Natural Hazards and Risk

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We have comprehensively analysed the co-seismic response of the groundwater levels of 280 wells in mainland China that were associated with the Wenchuan earthquake (Mw 7.9) that occurred on 12 May 2008. The observed co-seismic responses can be classified as step-like changes in 138 wells, variations in 69 wells and nonresponses in 73 wells. After a quantitative analysis of spatial distribution, there was no spatially coherent signal found in the step-like changes (positive values indicate a step-like rise, and negative values indicate a step-like fall), even within 300 km of the epicenter. The amplitude and the phase shift of the M 2-wave were compared between the pre-and post-earthquake conditions. The phase was forward and was concentrated at 0:23p $ 0:4p, regardless of the proximity of wells to the epicenter; however, the change in amplitude randomly increased or decreased. By computing the post-seismic groundwater recession, the characteristic times of the aquifers were s 2 ðÀ3:3 Â 10 6 ; 1:8 Â 10 6 Þ. We concluded that by assuming a first-order approximation, i.e. a one-dimensional aquifer, the causal mechanism of the co-seismic response of the groundwater level was that the seismic waves enhanced rock permeability by clearing the facture-filling materials. The shapes of the co-seismic responses were determined by the well-aquifer system and the proximity of the wells to recharge or discharge areas (x=L). The water level rose if the well was closer to the recharge area, the water level decline if the well was closer to the discharge area, and the water level oscillated if the well was farther from the recharge or discharge areas when the seismic wave was transmitted. The water level remained unchanged if the well did not penetrate any confined aquifer.

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Groundwater level changes related to the ground shaking of the Noto Hanto Earthquake in 2007

Cited by 12 publications

References 20 publications

Continental‐scale water‐level response to a large earthquake

Continental‐scale water‐level response to a large earthquake

Impacts of hydrogeological characteristics on groundwater-level changes induced by earthquakes

Groundwater level response to the Wenchuan earthquake of May 2008

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