Modeling sewage leakage and transport in carbonate aquifer using carbamazepine as an indicator
| Autor: | Noam Zach Dvory, M. Kuznetsov, Eilon Adar, Ovadia Lev, Alexander Yakirevich, Guy Gasser, Irena Pankratov, Yakov Livshitz |
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| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
0208 environmental biotechnology Carbonates Sewage Aquifer 02 engineering and technology Vadose zone Groundwater discharge Israel Groundwater Waste Management and Disposal Water Science and Technology Civil and Structural Engineering Hydrology geography geography.geographical_feature_category Environmental Biomarkers business.industry Ecological Modeling Water Pollution Environmental engineering Groundwater recharge Models Theoretical Karst Pollution 020801 environmental engineering Carbamazepine business Groundwater model Porosity Water Pollutants Chemical Geology |
| Zdroj: | Water Research. 128:157-170 |
| ISSN: | 0043-1354 |
| Popis: | The Western Mountain Aquifer (Yarkon-Taninim) of Israel is one of the country's major water resources and partially flows through a karst system. During late winter 2013, maintenance actions were performed on a central sewage pipe that caused sewage to leak into the creek located in the study area. Carbamazepine (CBZ) was used as an indicator for the presence of sewage in the groundwater. The research goal was to develop a mathematical model for quantifying flow and contaminant transport processes in the karst/fractured-porous unsaturated zone and groundwater system. The model was used to simulate CBZ transport during and after an observed sewage leakage event. A quasi-3D dual permeability numerical model represents the 'vadose zone – aquifer' system, by a series of 1D vertical flow and transport equations solved in a variably-saturated zone and by 3D-saturated flow and transport equation in groundwater. The results of simulation showed that after the leakage stopped, significant amounts of CBZ were retained in the porous matrix of the unsaturated zone below the creek. Water redistribution and slow recharge during the dry summer season contributed to a continuous supply of CBZ to the groundwater in the vicinity of the creek and hundreds of meters downstream. |
| Databáze: | OpenAIRE |
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