透水性舗装体の地下水涵養機能評価に用いるタンクモデル定数の同定について

抄録

The authors previously evaluated the groundwater recharge functions of porous pavement using a tank model (JSMS, JP, Vol. 59, No. 11, pp. 861–868), and used Powell's conjugate direction method (Powell's method), which is said to be prone to local suboptimal solutions, as a method for identifying the tank model parameters. Doubts have been raised about the results of identifying the tank model parameters and the evaluation of the groundwater recharge functions of the porous pavement based on this tank model constant identification. In this paper, the tank model parameters were re-identified using the Genetic Algorithm Random Search method (GA method), and the validity of the identification results (tank model parameters) using the Powell's method and the validity of the groundwater recharge functions evaluation of the porous pavement based on these identification results were verified. As a result, it was confirmed that there was no need to revise the evaluation of the groundwater recharge functions (rainwater infiltration function and rainwater storage function) of the porous pavement, even though the identification result by the Powell's method may have resulted in a localized suboptimal solution.