Assessing the Composite Risk of River Contamination: Perspectives, Problems, Methodology

Abstract

本研究では都市化の進展や産業構造の変化に伴って、河川汚染リスクが複雑化・複合化している可能性について指摘する。その際、低頻度・甚大被害リスクに特に着目する。公表されているPRTR データベースを活用することにより、この種の複合リスクの特定とその潜在的危険性の評価のための研究アプローチと方法論を議論する。具体的には名古屋都市圏を対象に分析を行う。併せて、今後のデータ・情報の整備の必要性についても検討する。

Surface water from rivers has become more important in Japan over the last fewdecades. The water demand of households and industry has increased. This study showshow publicly distributed data (ministries, prefecture administrations and others) can beused to improve the assessment of the risk of surface water contamination includingtriggers and consequences of releases of hazardous substances to surface waters. Toachieve this, six analysis methods based on publicly available data are presented in thisstudy, helping to identify sites at risk, possible threats to these sites, gaps in monitoring, accident analysis and combinations of these for proactive measures. Low frequency, highimpact events like inundation or accidents are mostly neglected in the current attempts topreserve the water resources and to analyse the risk of contamination. Those cases arealso considered in this study.