The aim of this paper is to analyse the hydrogeological issues involved in the sizing and the optimization of hydraulic barriers. In fact, the effectiveness of hydraulic barriers is often reduced because of incorrect sizing, not sufficiently related to the contamination and hydrogeological scenarios. This study, starting from the state of the art and using some analytical methods and a numerical model, analyses a series of optimization criteria strictly related to the hydrogeological situation and the state of contamination. The results show the reliability of the Javandel and Tsang (1986) analytical method also for unconfined aquifers; however the indications given by this method need to be reviewed through more complex tools, like numerical models. Then, the study examines the feasibility of combined barriers in complex scenarios for hydraulics barriers. In terms of safety systems, simulations reveal the advantages of a combination between a traditional barrier and a physical one. In terms of aquifer remediation, the association of a traditional extraction barrier and an injection one, upstream or downstream the polluted area, can highly reduce the remediation time.
A study about hydrogeological issues affecting the sizing of hydraulic barriers for groundwater remediation
Marengo D.;Antonio De Luca D.
2015-01-01
Abstract
The aim of this paper is to analyse the hydrogeological issues involved in the sizing and the optimization of hydraulic barriers. In fact, the effectiveness of hydraulic barriers is often reduced because of incorrect sizing, not sufficiently related to the contamination and hydrogeological scenarios. This study, starting from the state of the art and using some analytical methods and a numerical model, analyses a series of optimization criteria strictly related to the hydrogeological situation and the state of contamination. The results show the reliability of the Javandel and Tsang (1986) analytical method also for unconfined aquifers; however the indications given by this method need to be reviewed through more complex tools, like numerical models. Then, the study examines the feasibility of combined barriers in complex scenarios for hydraulics barriers. In terms of safety systems, simulations reveal the advantages of a combination between a traditional barrier and a physical one. In terms of aquifer remediation, the association of a traditional extraction barrier and an injection one, upstream or downstream the polluted area, can highly reduce the remediation time.
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