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Describing coseismic groundwater level rise using tank model in volcanic aquifers, Kumamoto, southern Japan
http://hdl.handle.net/10069/39620
http://hdl.handle.net/10069/39620039d01c1-d415-4a0e-823f-61972a232ca3
名前 / ファイル | ライセンス | アクション |
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JHydrol582_124464.pdf (2.6 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2020-12-18 | |||||
タイトル | ||||||
タイトル | Describing coseismic groundwater level rise using tank model in volcanic aquifers, Kumamoto, southern Japan | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Earthquake | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Groundwater level change | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Kumamoto | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Tank model | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Kagabu, Makoto
× Kagabu, Makoto× Ide, Kiyoshi× Hosono, Takahiro× Nakagawa, Kei× Shimada, Jun |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The change of groundwater levels after the 2016 Mw 7.0 Kumamoto crustal earthquake was evaluated using a simple conceptual hydrological model in an attempt to show the presence, intensity, and probable mechanism of water level rise observed in Kumamoto where a comprehensive observation-well network exists. A tank model was applied to verify 16 wells in the study field. In the model groundwater levels were first calibrated for the periods in ca. 2 years before the main shock using several hydrological parameters including precipitation, evapotranspiration, water recharge and discharge, and artificial recharge by irrigation. Water levels were then simulated by extrapolating this law of water fluctuating patterns for ca. 2.5 years after the main shock of the earthquake, without considering hydrogeological changes due to the earthquake. A difference in groundwater levels between observation and simulation results yields a degree of coseismic water level rises for each well. The coseismic abnormal water level increase was calculated to be ~11 m in 4?5 month after the main shock and was most significantly on the western slope of the Aso caldera rim mountains. The spatial distribution of the coseismic water increases clarified that the most dominate increasing anomalies prevail at mountain feet surrounding the plains, suggesting the occurrence of coseismic mountain water release resulting in the rise of water levels in downslope aquifers. Identified coseismic water level increases still continue up to 2.5 years after the earthquake, probably because changes in hydrogeological properties in mountain aquifers, i.e., permeability, are still sustained. Our forecasting water recovering trends require ca. 3.5?5 year after the earthquake for complete recovery to the original conditions. We demonstrated that our approaches are capable of describing coseismic water level changes and could potentially be applied to other fields. | |||||
書誌情報 |
Journal of Hydrology 巻 582, p. 124464, 発行日 2019-12-15 |
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出版者 | ||||||
出版者 | Elsevier B.V. | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00221694 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1016/j.jhydrol.2019.124464 | |||||
権利 | ||||||
権利情報 | c 2019 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Journal of Hydrology, 582, art.no.124464; 2020 |