| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-12-02 |
| タイトル |
|
|
タイトル |
Integrated assessment and classification of inland water chemistry in New Zealand |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Surface water |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Groundwater |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Water chemistry |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Self-organizing map (SOM) |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
New Zealand |
| 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
Amano, Hiroki
Rajanayaka, Channa
Yang, Jing
|
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Understanding freshwater characteristics is essential for the ecological and environmental management of water resources. New Zealand was selected as the research area, and a water chemistry survey was conducted on freshwater resource management. Addressing the growing water demand for irrigation is essential for adapting to climate change in the primary sectors of New Zealand. The intensification of livestock farming in recent years has led to water pollution issues, particularly from animal waste. In view of these concerns, it is crucial to study the status of inland water characteristics in New Zealand. In November 2023, water samples were collected from 33 sites, and their chemical characteristics were investigated. According to the Piper-trilinear diagram, most of the sites (65.6 %) were classified as alkaline earth carbonate type, seven sites (21.9 %) as alkali non-carbonate type, two sites (6.3 %) as alkaline carbonate type, and two sites (6.3 %) alkaline earth non-carbonate type. The Stiff patterns show that Ca-HCO3 and Na-HCO3 types exist in most of the sampling sites, and the Na-Cl type was found in a specific location of the coastal area. According to the Gibbs diagram, this water chemistry is formed by precipitation, mineral dilution, and ion exchange during water flow. The applicability of irrigation was assessed using the United States Salinity Laboratory (USSL) diagram. Self-organizing maps (SOMs) demonstrated diverse water quality characteristics across sample sites. Water samples were classified into four groups: (1) South Islands surface water group, (2) North Islands downstream water group, (3) nitrate polluted groundwater group, and (4) sodium affected large ionic strength group. This study demonstrated the effectiveness of a comprehensive and integrated approach to assess inland water chemistry by combining various conventionally used diagrams (Piper-trilinear diagram, Stiff patterns, Gibbs diagram, and USSL diagram) and neural networks (SOM). Although this integrated approach was applied to New Zealand in this study, it is generally applicable to all regions and countries that depend on inland water for their water resources. |
|
言語 |
en |
| 書誌情報 |
en : Heliyon
巻 11,
号 16,
p. art. no. e44105,
発行日 2025-11-13
|
| 出版者 |
|
|
出版者 |
Elsevier Ltd |
|
言語 |
en |
| ISSN |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
24058440 |
| DOI |
|
|
関連タイプ |
isIdenticalTo |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.1016/j.heliyon.2025.e44105 |
| 権利 |
|
|
権利情報 |
© 2025 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
|
言語 |
en |
| 著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 引用 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
Heliyon, 11(16), art. no. e44105; 2025 |
|
言語 |
en |
H11_e44105.pdf (7 MB)
