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Classification of groundwater chemistry in Shimabara, using self-organizing maps
http://hdl.handle.net/10069/37625
http://hdl.handle.net/10069/376259938039f-5ba5-48b1-9c9a-d4dec68b1aa2
名前 / ファイル | ライセンス | アクション |
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HydroRes48_840.pdf (1.3 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2018-01-01 | |||||
タイトル | ||||||
タイトル | Classification of groundwater chemistry in Shimabara, using self-organizing maps | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | cluster analysis | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | groundwater | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | major ions | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | self-organizing map | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | water chemistry | |||||
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× Amano, Hiroki× Kawamura, Akira× Berndtsson, Ronny |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Shimabara City in Nagasaki Prefecture, Japan, is located on a volcanic peninsula that has abundant groundwater. Almost all public water supplies use groundwater in this region. For this reason, understanding groundwater characteristics is a pre-requisite for proper water supply management. Thus, we investigated the groundwater chemistry characteristics in Shimabara by use of self-organizing maps (SOMs). The input to SOM was concentrations of eight major groundwater chemical components, namely Cl?, NO3?, SO42?, HCO3?, Na+, K+, Mg2+, and Ca2+ collected at 36 sampling locations. The locations constituted private and public water supply wells, springs, and a river sampled from April 2012 to May 2015. Results showed that depending on the chemistry, surface water and groundwater could be classified into five main clusters displaying unique patterns. Further, the five clusters could be divided into two major water types, namely, nitrate- and non-polluted water. According to Stiff and Piper trilinear diagrams, the nitrate-polluted water represented Ca-(SO4 + NO3) (calcium sulfate nitrate) type, while the non-polluted water was classified as Ca-HCO3 (calcium bicarbonate) type. This indicates that recharging rain water in the upstream areas is polluted by agricultural activities in the mid-slope areas of Shimabara. | |||||
書誌情報 |
Hydrology Research 巻 48, 号 3, p. 840-850, 発行日 2017-06 |
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出版者 | ||||||
出版者 | IWA Publishing | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00291277 | |||||
EISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 22247955 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.2166/nh.2016.072 | |||||
権利 | ||||||
権利情報 | c IWA Publishing 2017 | |||||
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 | Hydrology Research, 48(3), pp.840-850; 2017 |