River Basin Environment Assessment Considering Chemical Impact against Fish

Abstract

For an environment assessment related with the water pollution in the river basin, an analysis of each process such as pollutant release, distribution and exposure processes is needed to link in the significant scale. The purpose of this research is to build a hydrological river basin assessment model for an estimation of the water pollution distribution and an assessment of damage on fish population by using the distributed runoff model. A target area of the proposed simulation is the Yodo River basin including the Lake Biwa. The simulation is performed for an estimation of the distribution of Nonylphenol and Linear Alkylbenzene Sulfonate by physical-based model. Physiologically Based Pharmacokinetic model is used to estimate the accumulation of the chemical substance in fish body and the risk assessment of chemical substances is analyzed based on the simulated concentration of the chemical substances.