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Updated: Nov 19, 2025

An R-Based Landscape Validation of a Competing Risk Model
Published on: September 16, 2022
Risk dynamic evolution index based on fraction transformation and its application to site risk assessment
Haochen Dong1, Minoru Yoneda2, Liu Feng3
1Division of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto 6158540, Japan; Department of Environmental Sciences and Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
Abstract:
In this study, a potential ecological risk index for site dynamic risk evolution was proposed with the development trend of the Hakanson approach. The possibility factor Pi was attached to the contamination factor Cfi, representing the burst probability factor of dynamic risk arising from the transformation of metal(loid) fractions, ascertained by the delayed geochemical hazard (DGH) methodology. The toxic effects of different elements were explored through a meta-analysis. The effects of soil pH and soil organic matter on the mobile fraction of elements were examined, and the toxic factors (Tri) of six elements (arsenic, cadmium, chromium, copper, lead, and zinc) were modified for the site application. A total of 16 case studies representing four soil types (agricultural soil, industrial zone, mining area, and soil of river basin) were tested, and the results indicated that the proposed index could provide an early warning of site risk dynamics.
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