期刊
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
卷 40, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ejrh.2022.101051
关键词
Yonaguni Island; Spring water; Discharging mechanism; Seawater influence; Apparent residence time
资金
- Agency for Cultural Affairs
- JSPS KAKENHI [JP18H03733, JP20H04315]
- JST RISTEX grant [JPMJRX19IA]
- ORCHIDS project of the University of the Ryukyus
- Research Institute for Humanity and Nature (RIHN: a constituent member of NIHU) Project [14200145]
This study investigates the chemical composition of groundwater in the vicinity of Sanninudai on the southeast coast of Yonaguni Island to understand the mechanism of groundwater discharge. Accurate determination of groundwater flow paths is crucial for the conservation and management of groundwater sources.
Study region: Spring along the southeast coast of Yonaguni Island, located at the western end of the Ryukyu forearc. Study focus: The chemical composition of groundwater, including SF6 concentration, was investigated to clarify the mechanism of groundwater discharge around Sanninudai on the southeast coast of Yonaguni Island. New hydrological insights for the region: Accurate determination of groundwater flow paths is essential to the conservation and management of groundwater sources and their sustainable use. Other areas around the world may show similar complexity, requiring a review of past findings. This possibility indicates the need for re-examination of groundwater sources around the world. In particular, the development of novel analytical methods for chemical components may provide valuable information. The chemical composition of spring water on remote islands, where anthropogenic activities have little influence, should be investigated continuously to monitor the effects of sea-level rise caused by global warming.
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