2024-03-28T22:05:27Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00028097
2022-12-15T03:58:06Z
453:456
503:836:1555:1571
長岡地区地下水の流動状況の地球化学的研究
長岡地区地下水の流動状況の地球化学的研究
Geochemical study of Ground Water Recharge and Movement in Nagaoka Area.
佐藤, 修
鈴木, 幸治
青木, 滋
ground water
geochemistry
recharge
Nagaoka
tritium
地下水
地球化学
涵養
長岡
トリチウム
Ground waters are sampled from observation wells bored to measure ground water levels in Nagaoka and its outskirts. The water samples are analized for major ions and tritium concentrations. The analysis indicates 4 main aquifers (I, II, Ⅲ, IV) in an investigation area. Age of ground water in the aquifer I estimated from tritium concentration is youngest and ages of other aquifers become older with depth. The ground water in aquifer Ⅲ is recharged from rainfalls containing a large amount of tritium supplied since 1952 by the detonation of thermonuclear devices explosion in the atmosphere. The aquifer Ⅱ from which water using for snow melt is mainly pumped up is recharged from upperstream and infiltration in eastern mountain foot and partly recharged from river water of the Shinano river.
新潟大学積雪地域災害研究センター
1991-03
jpn
departmental bulletin paper
http://hdl.handle.net/10191/39125
https://niigata-u.repo.nii.ac.jp/records/28097
AN00183327
03877892
新潟大学積雪地域災害研究センター研究年報
新潟大学積雪地域災害研究センター研究年報
12
45
55
https://niigata-u.repo.nii.ac.jp/record/28097/files/12_45-55.pdf
application/pdf
472.7 kB
2019-08-20