Geoscience reports of Shimane University

島根大学総合理工学部地球資源環境学教室

ISSN:1343-9774

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Use this link to cite this item : https://ir.lib.shimane-u.ac.jp/6102

Geoscience reports of Shimane University 20

2001-12-28 発行

大根島淡水レンズの動態観測とトリチウム濃度

Long-term observation of the behavior of the freshwater-lens in Daikonjima lsland and tritium concentration in the groundwater

Sampei, Yoshikazu

Tokuoka, Takao

Ueno, Hiroyoshi

Fukita, Ayumi

Inoue, Takahiko

Nishioka, Kiyokazu

Suzuki, Shigenori

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c006020024.pdf 1.41 MB

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The gmundwater in Daikonjima island in Shimane prefecture，southwest Japan were investigated for salinity and temperature using the long-term observation system“CT-sensor”．Tritium concentrations of the groundwater supported the interpretation of the freshwater-lens behavior．Bottom fluctuation of the freshwater-lens was compared with tidal variation in Lake Nakaumi．Tidal effect was recognized in the intermediate zone below the freshwater-lens and above the high saline water．High tritium concentrations in the intermediate zone suggest the advection of new saline water from Lake Nakaumi．

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c006020024.pdf 1.41 MB

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