English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This study conducted an evaluation of hot spring discharge using five groundwater drainage wells in Hikaruma District of Matsunoyama, Tokamachi City, Niigata Prefecture. The samples collected from two groundwater drain wells were Na–Cl type water and had heavier oxygen and hydrogen isotope ratios than the other samples. The isotope ratio results indicated that the two samples formed by mixing between hot spring water and groundwater originated from meteoric water. An evaluation of the mixing ratio of the hot spring water and the groundwater originated from meteoric water, with a twocomponent mixing model using Cl concentration, showed that the mixing ratio of hot spring water was approximately 5 to 14% . When the mixing ratio was multiplied by the drainage amount of the two groundwater drain wells, the annual hot spring discharge from the two groundwater drain wells was estimated to be approximately 4.5×10 L. Key Word: groundwater drainage wells for landslide mitigation, Matsunoyama, hot spring discharge, Na-Cl type 地下水学会誌 第 60 巻第 4号 511 ~ 516(2018)

chikasui gakkaishi

Evaluation of hot spring discharge in the Hikaruma District of Matsunoyama, Tokamachi City, Niigata Prefecture, using groundwater drainage wells installed for landslide mitigation