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Analysis of earthquake-induced groundwater level change using self-organizing maps
http://hdl.handle.net/10069/39382
http://hdl.handle.net/10069/393823e49bfd1-4e9f-4f49-a12b-74540cc16dd2
名前 / ファイル | ライセンス | アクション |
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EES78_455pdf.pdf (1.1 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2020-07-20 | |||||
タイトル | ||||||
タイトル | Analysis of earthquake-induced groundwater level change using self-organizing maps | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Kumamoto earthquake | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Groundwater level (GWL) change | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Self-organizing map (SOM) | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Cluster analysis | |||||
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 |
Nakagawa, Kei
× Nakagawa, Kei× Yu, Zhi-Qiang× Berndtsson, Ronny× Kagabu, Makoto |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | For a better understanding of possible physical links between geophysical observables and earthquake characteristics, it is important to analyze statistical spatiotemporal patterns in nature related to such events. For this purpose,characteristic changes in groundwater level (GWL) were observed before and after the 2016 Kumamoto earthquake in Japan. Previous research has shown that self-organizing maps (SOM) can be used to classify complex patterns of GWL-change during different parts of the earthquake sequence. In this study, we used before and after earthquake GWL data as input vectors to SOM. In total, 64 observed GWLs were classified into 12 different clusters. Most shallow wells displayed GWL difference that was small during the foreshock (first earthquake) and large during the main-shock (second earthquake). Upstream deep wells showed relatively large difference in water level from 1 to 2 days after the earthquakes. The GWL rapidly increased just after the earthquake, then tended to gradually decrease from September. Most of the shallow wells in the unconfined aquifer rapidly recovered to initial GWLs within several hours to several days, because of hydrostatic pressure. However, most of the deep wells in the confined aquifer needed longer time to recover, in some cases several weeks to several months. These findings are important for the physical understanding of earthquake effects on the groundwater environment, disaster prevention, and possibility for development of earthquake precursors. | |||||
書誌情報 |
Environmental Earth Sciences 巻 78, 号 15, p. 455, 発行日 2019-07-20 |
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出版者 | ||||||
出版者 | Springer Verlag | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18666280 | |||||
EISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18666299 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1007/s12665-019-8473-z | |||||
権利 | ||||||
権利情報 | c Springer-Verlag GmbH Germany, part of Springer Nature 2019 | |||||
権利 | ||||||
権利情報 | The final publication is available at link.springer.com | |||||
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 | Environmental Earth Sciences, 78(15), art.no.455; 2019 |