Modelling tool estimates chemical contamination in rivers

The National Institute of Advanced Industrial Science and Technology (AIST) in Japan developed a modelling tool that assesses the risks of chemical substances in river basins and the effectiveness of risk reduction measures.

Called the AIST Standardised Hydrology-based Assessment Modelling Tool for Chemical Exposure Load (AIST=SHANEL) Ver.0.8, the new tool will provide data that is necessary to conduct risk assessment. The new tool is expected to help solve problems for businesses that emit chemicals, for local municipalities in charge of affected river basins, and for the general public.

The model uses data on the surrounding area’s meteorology, geography and sewage systems with PRTR emission data from industries to derive detailed data on exposure levels to concentrations of chemical substances. Estimates of chemical concentration exposure levels are issued daily in terms of square kilometre units.

This level of information detail makes it possible to assess ecological risks and identify causal links between an emission source and concentration exposures, enabling risk reduction measures to be evaluated.