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Development of environmental analysis methods based on tracability in water and organisms

Research Project

Project/Area Number 18K19878
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 64:Environmental conservation measure and related fields
Research InstitutionKagawa University

Principal Investigator

Yamada Yoshihiro  香川大学, 農学部, 教授 (30297460)

Co-Investigator(Kenkyū-buntansha) 大森 浩二  愛媛大学, 社会共創学部, 教授 (10152258)
井上 幹生  愛媛大学, 理工学研究科(理学系), 教授 (10294787)
申 基チョル  総合地球環境学研究所, 研究基盤国際センター, 准教授 (50569283)
Project Period (FY) 2018-06-29 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2018: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywordsアンチモン / トレーサー / 西条平野 / 灌漑 / 地下水 / 水循環 / 西条市 / 水源 / 河川 / 水の起源 / 市の川 / 加茂川 / Sr安定同位体比 / ヨシノボリ / 河川水 / 安定同位体比 / トレーサビリティ / 水利用 / 生態系 / 生物生産
Outline of Final Research Achievements

The water source of the Saijo Plain was quantified by using Sb, a geological substance, as a tracer. The surface water sources of the Saijo Plain are diverse, including Kamo River water, shallow groundwater, deep groundwater. The Sb concentration was different between these four sources. The highest concentration was over 10μg L-1 in shallow groundwater, the lowest concentration was ca. 0.2μg L-1 in deep groundwater. The contribution of the water origin in each waterway was determined by using the Sb concentration. The contribution of the Kamo River irrigation water was almost 100% in the upstream area, but the contribution of shallow groundwater exceeded 80% in the middle basin area. In the downstream area, the influence of the Kamo River irrigation water became smaller, and the contribution of deep groundwater was about 50%. We found that the deep groundwater discharged from domestic and agricultural wells into waterways is an important source of water in the Saijo Plain.

Academic Significance and Societal Importance of the Research Achievements

集水域の地質的な偏りは、水に反映される。それを利用し、水循環の解析を行った。下流の平野域では、標高差が少なく、人為的な河道変更も加わることで、水動態の解析を行うことが難しい。この研究では、的確なトレーサーを選定することで、水循環解析の低労力・迅速化を行い、この地域の水文的データベースの充実に貢献した。気候変動は地域の水循環を大きく変えている。西条市でも地下水の塩水化が起こっており、それを防止するための水利用が求められている。水文情報の定量化は、持続可能な水利用のために不可欠であり、本研究はそのための手法を提供した。

Report

(5 results)
  • 2023 Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2020 2019 2018

All Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] 微量元素をトレーサーとした西条平野の窒素・リン負荷の解析2020

    • Author(s)
      徳増 実,申 基澈,山田 佳裕
    • Organizer
      JpGU Joint Meeting 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 微量元素をトレーサーとした西条平野の窒素・リン負荷の解析2019

    • Author(s)
      徳増 実、申 基澈、山田 佳裕
    • Organizer
      第9回同位体環境学シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] Analyzing the origin of surface water in the Saijo Plain, Japan, based on the antimony concentration in the water2019

    • Author(s)
      Minoru Tokumasu, Ki-Cheol SHIN, Yoshihiro YAMADA
    • Organizer
      JpGU 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 西条平野における中小河川の物質循環と水の起源2018

    • Author(s)
      徳増実・山田佳裕
    • Organizer
      日本陸水学会大会
    • Related Report
      2018 Research-status Report
  • [Presentation] アンチモンからみた西条平野表流水の起源2018

    • Author(s)
      徳増実・山田佳裕
    • Organizer
      第8回同位体環境学シンポジウム
    • Related Report
      2018 Research-status Report

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Published: 2018-07-25   Modified: 2025-01-30  

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