Evaluation of Estimation Accuracy of River Model AIST-SHANEL– For Bisphenol A in the Tama River –

Y. Ishikawa, Yumi Komatsubara, Tomomi Eriguchi
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Abstract

The accuracy of the AIST-SHANEL model for estimating chemical concentrations in river water and sediment was evaluated for bisphenol A in the Tama River from 2017 to 2019 to promote the risk assessment of chemicals in river basins. The estimated river water and sediment concentrations of bisphenol A using the PRTR data were more than one order of magnitude lower than the measured values for both. After confirming the validity of the flow rate, the estimated chemical concentrations in river water and sediment were recalculated by adding the emissions of bisphenol A other than the PRTR data. As a result, the estimated river water concentrations were almost the same as the measured values. Although the concentration in river sediment tended to be underestimated, at about 1/3 of the measurement sites, the estimated concentrations were of the same level as the measured values. To enable further use of the AIST-SHANEL model, it is necessary to accumulate the accuracy evaluation data for more rivers and chemical substances and to examine the validity of the model.
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河流模型ist - shanel -对多摩河双酚A估算精度的评价
以2017 - 2019年多摩河双酚A为研究对象,对AIST-SHANEL模型估算河流水和沉积物中化学物质浓度的准确性进行了评价,以促进流域化学物质风险评估。使用PRTR数据估计的河水和沉积物双酚A浓度比两者的实测值低一个数量级以上。在确认流量的有效性后,通过添加PRTR数据以外的双酚A排放量,重新计算了河流水和沉积物中估计的化学物质浓度。结果,估计的河水浓度与实测值几乎相同。虽然河流沉积物中的浓度有被低估的趋势,但在约1/3的测点,估计浓度与实测值处于同一水平。为了使AIST-SHANEL模型的进一步应用,需要积累更多的河流和化学物质的精度评价数据,并对模型的有效性进行检验。
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