| Budget Amount *help |
¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2023: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2020: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
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| Outline of Final Research Achievements |
We developed a dynamic precipitation isoscape model using global objective analysis data as input and constructed various isotope models that can be integrated with it. Furthermore, we applied thes models to component separation in watershed evapotranspiration, snowmelt runoff, lake water balance, and hot springs. As a result, we found that: (1) proper consideration of selection effects is necessary to accurately estimate the transpiration/evapotranspiration ratio; (2) river water isotope information is effective for advancing the snowmelt runoff model and accurately estimating snowmelt components; (3) the spatiotemporal heterogeneity of recharge water isotope ratios must be appropriately considered to accurately estimate the evaporation/inflow ratio of lakes; and (4) the use of a meteoric water isoscape model and a lithospheric water curve allows for the precise evaluation of the mixing ratio of lithospheric water components.
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