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High-precision evaluation of mountainous catchment water balance by combined use of isotopic tracers and numerical models

Research Project

Project/Area Number 15H02957
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Geography
Research InstitutionUniversity of Tsukuba

Principal Investigator

Yamanaka Tsutomu  筑波大学, 生命環境系, 准教授 (80304369)

Project Period (FY) 2015-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥15,470,000 (Direct Cost: ¥11,900,000、Indirect Cost: ¥3,570,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2016: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Fiscal Year 2015: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Keywords流域水収支 / 山岳 / 同位体トレーサー / 数値モデル / 水循環 / 水資源 / 水収支 / 山岳流域 / 同位体
Outline of Final Research Achievements

Stable isotopic monitoring for precipitation and river water was made over mountainous region mainly in the central Japan, with regional survey for soil water, lake water, cold and hot springs. Based on these data set and meteorological/horological data, each term of catchment water and isotope budgets were estimated by spatiotemporal averaging using various types of numerical models. As a result, estimated precipitation was in good agreement with Radar-AMEDAS data, although Climate Mesh data were underestimated. In common catchments, groundwater flow across the divide accounts for 2.2-5.5% of precipitation and tends to be greater in large catchments with lower mean elevation.

Academic Significance and Societal Importance of the Research Achievements

我が国をはじめとして、山岳地域に主たる水源を求める国は多い。しかしながら、山岳域では降水量観測地点が疎であることにより水収支評価の精度が低く、流域界を横切る地下水流の存在や程度についても十分な検討がなされてこなかった。そこで本研究では、同位体トレーサーと数値モデルを融合させたアルゴリズムを開発し、降水量と越境地下水流量の定量的評価を可能とした。結果として、越境地下水流量は他の水収支項と比較して軽微であったが、未知の物理量を科学的根拠をもって示せたことには価値があり、山岳降水量観測値の信頼性評価がなされたことも重要である。また、新たに構築された方法論は今後の水循環トレーシングの基盤となり得る。

Report

(5 results)
  • 2019 Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • Research Products

    (8 results)

All 2018 2017 2016 2015

All Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Open Access: 5 results,  Acknowledgement Compliant: 1 results) Presentation (2 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Root functional change achieves water source separation under vegetation succession2018

    • Author(s)
      Yamanaka Tsutomu
    • Journal Title

      Ecohydrology

      Volume: 11 Issue: 7

    • DOI

      10.1002/eco.1985

    • NAID

      120007128252

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Runoff prediction in a poorly gauged basin using isotope-calibrated models2017

    • Author(s)
      Yamanaka Tsutomu、Ma Wenchao
    • Journal Title

      Journal of Hydrology

      Volume: 544 Pages: 567-574

    • DOI

      10.1016/j.jhydrol.2016.12.005

    • NAID

      120007135043

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Regional assessment of recharge elevation of tap water sources using the isoscape approach2017

    • Author(s)
      Yamanaka Tsutomu、Yamada Yuki
    • Journal Title

      Mountain Research and Development

      Volume: 37 Issue: 2 Pages: 198-205

    • DOI

      10.1659/mrd-journal-d-16-00066.1

    • NAID

      120007128946

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comparing root water uptake profile estimations from an isotope-calibrated mechanistic model and a mixing model2017

    • Author(s)
      Yamanaka Tsutomu、Kimura Takeo、Sun Xingchao、Kato Hiroaki、Yuichi Onda
    • Journal Title

      Hydrological Research Letters

      Volume: 11 Issue: 3 Pages: 161-167

    • DOI

      10.3178/hrl.11.161

    • NAID

      130006041712

    • ISSN
      1882-3416
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Isotope mapping on mountainous regions: current state and way forward2016

    • Author(s)
      山中 勤、鈴木啓助、脇山義史、岸 和央、牧野裕紀、丸山浩輔、加納正也、馬 文超、正木大祐、杉山昌典、山川陽祐、吉竹晋平
    • Journal Title

      Journal of Japanese Association of Hydrological Sciences

      Volume: 46 Issue: 2 Pages: 73-86

    • DOI

      10.4145/jahs.46.73

    • NAID

      130005408934

    • ISSN
      1342-9612, 1883-7166
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] How reliable are modeled precipitation isoscapes over a high-relief mountainous region?2015

    • Author(s)
      Yamanaka, T., Y. Makino, Y. Wakiyama, K. Kishi, K. Maruyama, M. Kano, W. Ma and K. Suzuki
    • Journal Title

      Hydrological Research Letters

      Volume: 9 Issue: 4 Pages: 118-124

    • DOI

      10.3178/hrl.9.118

    • NAID

      130005130496

    • ISSN
      1882-3416
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Synergy between isotope tracers and numerical modelling: Is it useful?2018

    • Author(s)
      Tsutomu Yamanaka
    • Organizer
      日本地球惑星連合2018年大会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Elevational dependence of catchment-scale evapotranspiration partitioning as revealed by water stable isotopes2017

    • Author(s)
      Yamanaka Tsutomu、Sato Rei
    • Organizer
      American Geophysics Union 2017 Fall Meeting
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research

URL: 

Published: 2015-04-16   Modified: 2022-11-04  

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