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2023 Fiscal Year Final Research Report

Estimating the degree of recovery of aquatic organisms through the reduction of chemical concentrations at approximately 3,000 river sites nationwide

Research Project

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Project/Area Number 20K12213
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 64010:Environmental load and risk assessment-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

IWASAKI Yuichi  国立研究開発法人産業技術総合研究所, エネルギー・環境領域, 主任研究員 (00748840)

Project Period (FY) 2020-04-01 – 2024-03-31
Keywords水質 / 河川 / 底生動物 / 土地利用 / 有機汚濁 / 平均スコア / 水生昆虫 / データベース
Outline of Final Research Achievements

This study has compiled physicochemical characteristics such as water quality and land use (Iwasaki et al. 2022, Journal of Japan Society on Water Environment) as well as biological characteristics based on the average score per taxon (ASPT) of macroinvertebrates (Iwasaki et al. 2024, Environmental Science and Pollution Research) at approximately 3,000 water quality monitoring sites (environmental reference points) in rivers across Japan. Data and results related to these studies are available on the GitHub repositories. We have compiled information that enables the inference of the degree of recovery through the reduction of chemical concentrations at these water quality monitoring sites.

Free Research Field

生態リスク学

Academic Significance and Societal Importance of the Research Achievements

本研究で整備した水質測定地点の物理化学的特徴及び平均スコア(河川環境の良好性の指標)に基づいて、例えば、任意の水質測定地点が森林の土地利用が集水域で卓越し水質が良好なグループに属しており底生動物の平均スコアから「とても良好」と判定される場合、当該地点で任意の化学物質の顕著な影響が懸念される場合はそれを低減することによる水生生物の保全効果は大きいと期待される。一方で、田畑または都市の土地利用割合が集水域で卓越し水質の悪化が懸念され、底生動物の平均スコアが低いグループの場合は、任意の化学物質の濃度低減による水生生物保全効果は低いと推察できる。

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Published: 2025-01-30  

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