Evaluation of the Performance of Permeable Reactive Barriers for Contaminated Groundwater Remediation

土壌・地下水汚染対策工法の反応透過壁工法(反応性バリア)を対象として，その設計パラメータを平面2次元浸透流解析により評価した。その結果に基づき，汚染サイトの特性に応じた最適な反応透過壁構造を見出すことができる設計手法を提案した。汚染サイトを正常に浄化することのできる条件を満たし，なおかつ施工費用が最小になるという視点から最適な反応透過壁構造を議論した。
Performance of permeable reactive barriers for contaminated groundwater remediation was evaluated using FEM seepage analysis. The retention time and the capture zone were calculated on the funnel-and-gate systems (FGSs) having different geometries, in order to evaluate the effects of these geometries on the FGSs performance. Based on the calculated results, costs associated with the installation of funnel-and-gate systems satisfying a certain performance were obtained to estimate the cost-effective geometry. Finally, optimum design flow for FGS was proposed.